KB9224
VIDEO-CD 2ND GENERATION
KB9224
PRELIMINARY
DATA SHEET
1999.6.7
1
VIDEO-CD 2ND GENERATION
KB9224
INTRODUCTION
The KB9224 is a Servo Signal Processor designed specifically for the Samsung Video-CD designed using the
BICMOS process. RF Block and Picture Quality Enhancing Items are built-in. The processor is a Hard-wired FreeAdjustment Servo with the Pre-signal parts adjustment point automatically adjusted.
FEATURES
• Focus Error Amplifier & Servo Control
• Tracking Error Amplifier & Servo Control
• Sled Amplifier
• Embedded CLV Control LPF
• APC (Auto Laser Power Control) Circuit for Constant Laser Power
• Double Speed Play Available
• Circuit for Interruption Countermeasure
• Mirror, FOK & Defect Detector Circuit
• FE Bias & Focus Servo Offset Free Adjustment
• EF Balance & Tracking Loop Gain Free Adjustment
• Tracking Servo Offset Free Adjustment
• Enhanced Auto-Sequence Algorithm (Fast-Search)
• Tracking Mutting by Window Mirror
• Current, Voltage Pick-up Interaction available
• Embedded RF 3T Boost Circuit
• Enhanced RF Equalize AGC Circuit
• Built-in Envelope EFM Slicer
• Built-in DSP C1-flag Control Circuit
• RF Peaking Prevention Circuit
• Focus & Tracking mutting by EFM Duty Countermeasure
• Built-in Focus, Tracking 2x Filter Adjust
• Single Power Supply: +5 V
•- Related Products
. KS9287 Data Processor
. KA9258D/KA9259D Motor Driver
2
VIDEO-CD 2ND GENERATION
KB9224
IRF
RFO
RF-
RFL
BOOSTC2
IVSEL
VCC
VR
LD
PD
E
F
PDD
PDB
PDC
PDA
80
79
78
77
76
75
74
73
72
71
70
69
68
67
66
65
PIN CONFIGURATION
EQI
1
64
DVEE
EQI2
2
63
FEBIAS
RFI
3
62
TG2
4
61
TGU
MOC
5
60
FDFCT
CAGC
6
59
FE1
GND
7
58
FE2
MCP
8
57
TDFCT
DCB
9
56
DVDD
FRSH
10
55
LPFT
DCC2
11
54
TE1
DCC1
12
53
TE2
FSET
13
52
TZC
VDDA
14
51
ATSC
ENBR
15
50
TEO
ENC
16
49
TE-
ENVO
17
48
FEO
ISET
18
47
FE-
VREG
19
46
SPDLO
WDCK
20
45
SPDL-
SMDP
21
44
SL-
SMON
22
43
SLO
SMEF
23
42
SL+
DEFECT
24
41
SSTOP
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
FS3
FGD
LOCK
TRCNT
ISTAT
EFM
EFM2
ASY
VSSA
MCK
MDATA
MLT
RESET
MIRROR
FOK
KB9224
FLB
ARF2
3
VIDEO-CD 2ND GENERATION
KB9224
PIN DESCRIPTION
No.
Pin Name
I/O
Description
1
EQI
I
RF AGC & Eqaualize input pin
2
EQI2
I
RF AGC & Equalize input connect switch (controled by Flag)
3
RFI
I
EFM COMPARATOR input pin
4
ARF
O
RF AGC & EQ output pin.
5
ARF2
O
RF AGC & EQ output connect pin (controled by Falg)
6
CAGC
I
AGC_EQUALIZE LEVEL control pin, VCA input pin & NOISE eliminating CAP pin
7
GND
G
Ground (RF block)
8
MCP
I
Half-wave rectifier CAP pin for MIRROR output
9
DCB
I
DEFECT MAX DUTY limiting CAP pin
10
FRSH
I
FOCUS SEARCH generating & charge/discharge CAP pin
11
DCC1
O
DEFECT MIN DUTY generating DC eliminating CAP pin. (connected DCC1)
12
DCC2
I
DEFECT MIN DUTY generating DC eliminating CAP pin (connected DCC2)
13
FSET
I
FCOUS,TRACKING,SPINDLE PEAKING frequency compensation BIAS pin
14
VDDA
P
5V POWER pin for SERVO
15
ENBR
I
BIAS pin for ENVELOPE EFM-SLICE
16
ENC
I
RF ENVELOPE DC BIAS extract voltage input pin
17
ENVO
O
RF ENVELOPE output pin
18
ISET
I
FOCUS SERARCH,TRACKING JUMP, SLED KICK voltage generating BIAS pin
19
VREG
O
3.4 V REGULATOR output pin
20
WDCK
I
88.2KHz input pin from DSP
21
SMDP
I
SMDP input pin of DSP
22
SMON
I
SMON input pin of DSP
23
SMEF
I
External LPF time constant connection pin of CLV servo error signal
24
DEFECT
O
DEFECT output pin.
25
FLB
I
CAP pin for FOCUS LOOP rising low band
26
FS3
I
FOCUS LOOP’s high frequency gain adjustment pin
27
FGD
I
FOCUS LOOP’s high frequency gain adjustment pin
28
LOCK
I
SLED RUN AWAY preventing pin (L: Sled Off and Tracking Gain Up)
29
TRCNT
O
Track Count output pin
30
ISTAT
O
INTERNAL STATUS output pin
31
EFM
O
RFO SLICE EFM output pin (to DSP)
4
VIDEO-CD 2ND GENERATION
KB9224
PIN DESCRIPTION (Continued)
No.
Pin Name
I/O
Description
32
EFM2
O
EFM comparator integrating output pin
33
ASY
I
AUTO asymmetry control input pin
34
VSSA
G
SERVO part analog VSSA power supply PIN
35
MCK
I
MICOM clock pin
36
MDATA
I
DATA input pin
37
MLT
I
DATA LATCH input pin
38
RESET
I
RESET input pin
39
MIRROR
O
MIRROR detect output pin
40
FOK
O
FOCUS OK output pin
41
SSTOP
I
PICK UP's maximum lead-in diameter position check pin
42
SL+
I
SLED SERVO non-inverting input
43
SLO
O
SLED SERVO output
44
SL-
I
SLED SERVO inverting input
45
SPDL-
I
SPINDLE AMP inverting input pin
46
SPDLO
O
SPINDLE AMP output pin
47
FE-
I
FOCUS SERVO AMP inverting input pin
48
FEO
O
FOCUS SERVO AMP output pin
49
TE-
I
TRACKING SERVO AMP inverting input pin
50
TEO
O
TRACKING SERVO AMP output pin
51
ATSC
I
ANTI-SHOCK input pin
52
TZC
I
TRACKING ZERO CROSSING input pin
53
TE2
I
TRACKING SERVO input pin
54
TE1
O
TRACKING ERROR AMP output pin
55
LPFT
I
TRACKING ERROR integrating input pin (Auto adjust)
56
DVDD
P
LOGIC DVDD power supply pin
57
TDFCT
I
DEFECT TRACKING ERROR integrating CAP connection pin
58
FE2
I
FOCUS SERVO input pin
59
FE1
O
FOCUS ERROR AMP output pin
60
FDFCT
I
When DEFECT, FOCUS ERROR integrating CAP connection pin
61
TGU
I
High frequency TRACKING GAIN SWITCHING CAP connection pin
62
TG2
I
Time constant controlling TRACKING LOOP's high frequency gain control pin
63
FEBIAS
I
FOCUS ERROR BIAS control connect pin
5
VIDEO-CD 2ND GENERATION
KB9224
PIN DESCRIPTION (Continued)
No.
Pin Name
I/O
Description
64
DVEE
G
LOGIC DVEE power supply pin
65
PDA
I
POTO-DIODE A & RF I/V AMP1 inverting input pin
66
PDC
I
POTO-DIODE C & RF I/V AMP1 inverting input pin
67
PDB
I
POTO-DIODE B & RF I/V AMP2 inverting input pin
68
PDD
I
POTO-DIODE D & RF I/V AMP2 inverting input pin
69
F
I
POTO-DIODE F & TRACKING (F) I/V AMP inverting input pin
70
E
I
POTO-DIODE F & TRACKING (E) I/V AMP inverting input pin
71
PD
I
APC AMP input pin
72
LD
O
APC AMP output pin
73
VR
O
(VCC+GND)/2 VOLTAGE REFERENCE output pin
74
VCC
P
RF PART VCC power supply pin
75
IVSEL
I
Pick-UP Type Select pin(Default Pull Down)
76
BOOSTC2
I
RF SUMMING AMP 3T BOOST's CAP connection pin (connected GND)
77
RFL
I
RF SUMMING AMP NOISE eliminating CAP connection pin (connected RFO)
78
RF-
I
RF SUMMING AMP inverting input pin
79
RFO
O
RF SUMMING AMP output pin
80
IRF
I
RFO DC eliminating input pin (Used in MIRROR, FOK pin)
6
VIDEO-CD 2ND GENERATION
KB9224
MICOM COMMAND
($0X, $1X)
Address
Item
Data
Symbol
Focus Control
0000
Tracking Control
0001
D3
D2
D1
D0
FS4
FS3
FS2
FS1
Focus On Gain Down Search On Search Up
AntiShock
Brake On
TG2
Gain Set
ISTAT
Output
FZC
TG1
Gain Set
ATSC
ISTAT
Output
Tracking Gain Setting for Anti-Shock
D7
0
D6
0
D5
D3
D2
D1
D0
Anti-Shock
Lens. Brake
TG2 (D3=1)
TG1
D4
0
1
Item
0
1
AntiShock
Off
AntiShock
On
0
Lens
Brake
Off
Hex
1
Lens
Brake
On
$13,$17,$1B,$1F (AS0)
$13,$17,$18,$1C (AS1)
TRACKING GAIN UP
At this time, MIRROR
MUTTING is OFF
High
Freq.
Gain
1
High
Freq.
Gain
AS=0
TG2
Tracking Gain Control
TG1, TG2=1 GAIN UP
0
0
1
Normal Gain
Gain
Up
ATSC
AS=1
TG1
TG2
TG1
$10
0
0
0
0
$11
0
1
0
1
$12
1
0
1
0
$13
1
1
1
1
$14
0
0
0
0
$15
0
1
0
1
$16
1
0
1
0
$17
1
1
1
1
$18
0
0
1
1
$19
0
1
1
0
$1A
1
0
0
1
$1B
1
1
0
0
$1C
0
0
1
1
$1D
0
1
1
0
$1E
1
0
0
1
$1F
1
1
0
0
7
VIDEO-CD 2ND GENERATION
KB9224
$2X
D7
D6
D5
D3
D4
D2
D1
Tracking Servo Mode
0
0
1
0
TM1
Mode
D0
ISTAT
Output
Sled Servo Mode
TM7
TM6
TM5
TM4
TM3
TM2
TM1
$20
1
0
1
0
1
1
0
0
Track. Servo Off
$21
1
0
1
0
1
0
0
1
Track. Servo On
$22
1
0
0
0
1
1
0
$23
1
1
1
0
1
1
0
TM2
0
Sled. Servo Off
$24
1
0
1
0
1
1
1
1
Sled. Servo On
$25
1
0
1
0
1
0
1
TM4
TM3
Track. Kick $26
1
0
0
0
1
1
1
0
0
FWD. Jump $27
1
1
1
0
1
1
1
0
0
$28
1
0
1
0
0
1
0
0
0
REV. Jump $29
1
0
1
0
0
0
0
TM4
TM3
Sled. Kick
$2A
1
0
0
0
0
1
0
0
0
FWD. Kick
$2B
1
1
1
0
0
1
0
0
0
Kick Off
$2C
1
0
1
1
1
1
0
0
0
REV. Kick
$2D
1
0
1
1
1
0
0
$2E
1
0
0
1
1
1
0
$2F
1
0
0
1
1
1
0
Jump Off
TM7 (Jump)
1
Lens Brake On
TZC
8
VIDEO-CD 2ND GENERATION
KB9224
Tracking Condition for DIRC (Direct 1 Track Jump)
Item
Hex
Tracking Mode
DIRC=1
DIRC=0
DIRC=1
TM[6:1}
TM[6:1}
TM[6:1}
$20
000000
001000
000011
$21
000010
001010
000011
$22
010000
011000
100001
$23
100000
101000
100001
$24
000001
000100
000011
$25
000011
000110
000011
$26
010001
010100
100001
$27
100001
100100
100001
$28
000100
001000
000011
$29
000110
001010
000011
$2A
010100
011000
100001
$2B
100100
101000
100001
$2C
001000
000100
000011
$2D
001010
000100
000011
$2E
011000
000100
100001
$2F
101000
100100
100001
Resistor $3X
Focus Search
Address
D15~D12
0011
D11
PS4
Search+2
Sled Kick
D10
PS3
Search+1
D9
PS2
Kick+2
Flag Detect Reference
D8
0
1
AFRC
SPEAK
MODEC
On/Off
TOCD
RFS
D5
D4
D3
D2
D1
D0
Equalize 3T
input Gain
Peaking prevent
standard freq.
EFM.SLICE
Peaking
prevent On/Off
TRACKING
offset adjust
Focus Servo
Cprak Muting
0: 1X
1: 1.5X
0: 44 kHz
1: 88 kHz
0: ENVEL.
1: NORMAL
0: 44 kHz
1: 88 kHz
0: OFF
1: ON
0: Off
1: ON
0
1
1
0
1
0
Address
Initial
D6
D7 D6 Defect Duty
0
0 0.45ms
0
1 0.54ms
1
0 0.63ms
1
1 0.73ms
PS1
Kick+1
Initial
D15~D12
0011
D7
NOTES:
9
VIDEO-CD 2ND GENERATION
1.
2.
3.
4.
5.
KB9224
D7,D6: 11>01>10>00 Equalize precision control
D3: Envelope EFM-slice or normal EFM-slice select
D1: Tracking Servo offset adjust select§
**TOCD: Tracking Balance, Gain, Offset **
Register reset command (0: Reset,1: Reset Cancel)
Select (Upper 8 bits out of 16 bits)
D7
D6
D5
D4
D3
D2
D1
Focus Servo
Search Level Control
0
0
1
1
DATA MODE
(LEVEL)
DATA
D0
ISTAT
Sled Servo
Kick Level Control
SSTOP
PS4
PS3
PS2
PS1
Search +2
Search +1
Kick +2
Kick +1
Search X1
$30 ~ $33
Kick
X1
$30,$34,$38,$3C
Search X2
$34 ~ $37
Kick
X2
$31,$35,$39,$3D
Search X3
$38 ~ $3B
Kick
X3
$32,$36,$3A,$3E
Search X4
$3C ~ $3F
Kick
X4
$33,$37,$3B,$3F
S.X1, K.X1
S.X2, K.X2
S.X3, K.X3
S.X4, K.X4
$30
$35
$3A
$3F
Auto Sequence Mode
ADDRESS
0
1
0
DATA
0
D3
D2
D1
D0
Auto-Sequence Cancel
0
0
0
0
Auto-Focus
0
1
1
1
1-Track Jump
1
0
0
10-Track Jump
1
0
1
2N-Track Jump
1
1
0
M-Track Jump
1
1
1
Fast Search
0
1
0
0: FWD
1: REV
10
VIDEO-CD 2ND GENERATION
KB9224
RAM Resistor Set
Item
Data
Address
D11
D10
D9
D8
BLIND A, E
$5XX
OVERFLOW. C
0.18
ms
0.09
ms
0.04
ms
0.02
ms
BRAKE. B
0.36
ms
0.18
ms
0.09
ms
0.04
ms
FAST
F
23.2
ms
11.6
ms
5.80
ms
2.90
ms
FAST
K
KICK D
D7
D6
D5
D4
D3
D2
D1
D0
I/V->1: Current Type 58K SHORT
T.RST->1: Adjust value RESET
0.72
ms
0.36
ms
0.18
ms
0.09
ms
I/V
SEL
T.RST
adjust
EFMB
C
FJTS
1
0
0
0
0
0
0
0
INI
1
0
1
0
$6XXX
11.6
ms
5.80
ms
2.90
ms
1.45
ms
EFMBC:0-Single Asy compensation
1-Double ASY compensation
23.2
ms
11.6
ms
5.80
ms
2.90
ms
FJTS: 0:Track mutt off Fast Search
1:Track mutt on Fast Search
FAST R
PWM DUTY
PD
8
4
2
1
PWM WIDTH
PW
5.80
ms
2.90
ms
1.45
ms
0.75
ms
INI.
0
1
1
1
1
0
1
0
0
0
1
0
2N TRA N
M TRA. M
$7XXX
4096
2048
1024
512
256
128
64
32
16
8
4
2
FAST SEARCH
T
$7XXX
1638
4
8192
4096
2048
1024
512
256
128
64
32
16
8
INI.
0
0
0
0
0
0
1
1
1
1
1
1
$BXXX
1638
4
8192
4096
2048
1024
512
256
128
64
32
16
8
INI.
0
0
0
0
0
0
1
1
1
0
0
0
BRAKE POINT
P
NOTES:
1.
Warning
1.
Out of the 16 settings, PWM Width (PW) can select only one of 1, 2, 4, or 8 (not a 4-bit mixture)
2.
When using a 2N Track or an M Track, more than 512 Tracks is not recommended (potential for error
within the algorithm)
3.
There can be a 1~2 error in the PWM Duty (PD), so set to fixed value + 2
4.
$5XXXs I/V SEL command (0: pick-up configuration using both voltage and current, 1: current-type only)
11
VIDEO-CD 2ND GENERATION
KB9224
ABSOLUTE MAXIMUM RATINGS
Item
Symbol
Min
Typ
Max
Unit
5
V
Supply Voltage
Vmax
Operating Temperature
TOPR
- 20
25
70
°C
Storage Temperature
TSTG
- 55
25
150
°C
Permissible Loss
Pd
150
mW
ELECTRICAL CHARACTERISTICS
No
1
Item
Supply current 6v
Symbol
Block
ICCHI
Supply
current
Min
Typ
Max
Unit
20
40
60
mA
15
32
50
mA
2
Supply current 5v
ICCTY
3
Supply current 4v
ICCLO
10
25
40
mA
4
RF AMP offset voltage
Vrfo
-85
0
+85
mV
5
RF AMP Oscillation voltage
Vrfosc
0
50
100
mV
6
RF AMP voltage gain
Grf
16.2
19.2
22.2
dB
7
RF AMP voltage gain 2
Grf2
16.2
19.2
22.2
dB
8
RF RHD charac.
RFTHD
-
-
5
%
9
RF AMP maximum output
voltage
Vrfpp1
3.8
-
-
V
10
RF AMP minimum output
voltage
Vrfpp2
-
-
2.0
V
11
1X RF AC charac.
RFAC1
1.00
1.50
2.0
-
12
2X RF AC charac.
RFAC2
0.50
1.25
4.0
-
13
RF AC coupling charac.
RFAC3
0.7
1
1.3
-
14
RF AC coupling charac. 2
RFAC4
0.2
0.5
0.8
-
15
RF IVSEL connection charac.
AC
RFSELAC
35
55
75
Kohm
16
RF IVSEL connection charac.
BD
RFSELBD
35
55
75
Kohm
17
RF IVSEL connection charac.
AC2
RFSELAC2
70
110
150
Kohm
18
RF IVSEL connection charac.
BD2
RFSELBD2
70
110
150
Kohm
RF AMP
RF Boost
Option
12
VIDEO-CD 2ND GENERATION
No
Item
KB9224
Symbol
Block
Min
Typ
Max
Unit
19
FOCUS ERROR OFFSET
voltage
VFEO1
-525
-250
-50
mV
20
FOCUS ERROR AUTO voltage
VFEO2
-35
0
+35
mV
21
ISTAT after FEBIAS adjust
VISTAT1
4.3
-
-
V
22
FOCUS ERROR voltage gain 1
GFEAC
18
21
24
dB
23
FOCUS ERROR voltage gain 2
GFEBD
18
21
24
dB
24
FOCUS ERROR voltage gain
difference
-3
0
+3
dB
25
FOCUS ERROR AC difference
VFEACP
0
50
100
mV
26
FERR maximum output
voltage H
VFEPPH
4.4
-
-
V
27
FERR minimum output voltage
L
VFEPPL
-
-
0.6
V
28
AGC max. gain
GAGC
16
19
22
dB
29
AGC EQ gain
GEQ
0
1
2
dB
30
AGC normal gain
GAGC2
3.0
6
9
dB
31
AGC compress ratio
CAGC
0
2.5
5
dB
32
AGC frequency
FAGC
-1.5
0
2.5
dB
33
AGC level control 1
AGCL1
1.03
1.15
1.3
-
34
AGC level control 2
AGCL2
1.0
1.15
1.3
-
35
AGC level control 3
AGCL3
1.0
1.15
1.25
-
Delta GFE
Focus Error
AMP
RF AGC &
Equalizer
13
VIDEO-CD 2ND GENERATION
No
Item
KB9224
Symbol
Block
Min
Typ
Max
Unit
36
TERR gain voltage gain 1
GTEF1
-1.5
0.5
2
dB
37
TERR gain voltage gain 2
GTEF2
1
1.7
2.4
-
38
TERR gain voltage gain 3
GTEF3
1
1.3
1.6
-
39
TERR gain voltage gain 4
GTEF4
1
1.45
1.9
-
40
TERR gain voltage gain 5
GTEF5
1
1.55
2.1
-
41
TERR gain voltage gain 6
GTEF6
1
1.45
1.9
-
42
TERR gain voltage gain 7
GTEF7
1
1.45
1.9
-
43
TERR balance gain
GTEE
10.5
13.5
16.5
dB
44
TERR balance mode 1
TBE1
1.0
1.05
1.1
-
45
TERR balance mode 2
TBE2
1.0
1.05
1.1
-
46
TERR balance mode 3
TBE3
1.0
1.05
1.1
-
47
TERR balance mode 4
TBE4
1.0
1.10
1.5
-
48
TERR balance mode 5
TBE5
1.0
1.20
1.4
-
49
TERR balance mode 6
TBE6
1.0
1.3
1.75
-
50
TERR EF voltage gain
difference
Delta GTEF
10.0
13.0
16.0
dB
51
TERR maximum output voltage
H
VTPPH
3.5
-
-
V
52
TERR minimum output voltage
L
VTPPL
-
-
1.5
V
53
APC PSUB voltage L
APSL
-
-
1.2
V
54
APC PSUB voltage H
APSH
3.8
-
-
V
55
APC NSUB voltage L
ANSL
-
-
1.2
V
56
APC NSUB voltage H
ANSH
3.8
-
-
V
57
APC PSUB voltage LDOFF
4.0
-
-
V
-
-
1.0
V
APSLOF
ANSLOF
Tracking
Error Gain &
Balance
Automatic
Power
Control
(APC)
58
APC NSUB voltage LDOFF
59
APC current drive H
ACDH
2.5
-
-
V
60
APC current drive L
ACDL
-
-
2.5
V
61
MIRROR minimum operting
freq.
FMIRB
-
550
900
HZ
62
MIRROR maximum operting
freq.
FMIRP
30
75
-
Khz
63
MIRROR AM charac.
FMIRA
-
400
600
HZ
64
MIRROR minimum input
voltage
VMIRL
-
0.1
0.2
V
65
MIRROR maximum input
voltage
VMIRH
1.8
-
-
V
MIRROR
14
VIDEO-CD 2ND GENERATION
No
Item
KB9224
Symbol
Min
Typ
Max
Unit
-420
-350
-300
mV
4.3
-
-
V
-
-
0.7
V
FFOK
40
45
50
KHZ
66
FOK THRESHOLD voltage
VFOKT
67
FOK output voltage H
VFOHH
VFOKL
Block
FOK
68
FOK output voltage L
69
FOK freq. charac.
70
DEFECT BOTTOM voltage
FDFCTB
-
670
1000
HZ
71
DEFECT Cutoff voltage
FDFCTC
2.0
4.7
-
KHZ
72
DEFECT minimum input
voltage
VDFCTL
-
0.3
0.5
V
73
DEFECT maximum input
voltage
VDFCTH
1.8
-
-
V
74
NORMAL EFM DUTY voltage 1
NDEFMN
-50
0
+50
mV
75
NORMAL EFM DUTY symmetry
NDEFMA
0
5
10
%
76
NORMAL EFM DUTY voltage 3
NDEFMH
0
+50
+100
mV
77
NORMAL EFM DUTY voltage 4
NDEFML
-100
-50
0
mV
-
-
0.12
V
DEFECT
Normal
EFM Slice
78
NORMAL EFM minimum input
voltage
NDEFMV
79
NORMAL EFM DUTY
difference 1
NDEFM1
30
50
70
mV
80
NORMAL EFM DUTY
difference 1
NDEFM2
30
50
70
mV
81
ENV EFM DUTY voltage 1
EDEFMN1
-50
0
+50
mV
82
ENV EFM DUTY voltage 2
EDEFMN2
-50
0
+50
mV
83
ENV EFM DUTY symmetry
EDEFMA
0
5
10
%
84
ENV EFM DUTY voltage 3
EDEFMH1
0
+50
+100
mV
85
ENV EFM DUTY voltage 4
EDEFMH2
+160
+250
+340
mV
86
ENV EFM DUTY voltage 5
EDEFML1
-100
-50
0
mV
87
ENV EFM DUTY voltage 6
EDEFML2
-340
-250
-160
mV
88
ENV EFM minimum input
voltage
EDEFMV
-
-
0.12
V
89
FZC THRESHOLD voltage
VFZC
35
69
100
mV
90
ANTI-SHOCK detect H
VATSCH
7
32
67
mV
91
ANTI-SHOCK detect L
VATSCL
-67
-32
-7
mV
92
TZC THRESHOLD voltage
VTZC
-30
0
+30
mV
93
SSTOP THRESHOLD voltage
VSSTOP
-100
-65
-30
mV
Envelope
EFM Slice
15
VIDEO-CD 2ND GENERATION
No
Item
KB9224
Symbol
Block
Min
Typ
Max
Unit
94
TRACKING GAIN WIN T1
VTGWT1
200
250
300
mV
95
TRACKING GAIN WIN T2
VTGWT2
100
150
200
mV
96
TRACKING GAIN WIN I1
VTGWI1
250
300
350
mV
97
TRACKING GAIN WIN I2
VTGWI2
150
200
250
mV
98
TRACKING BAL WIN T1
VTGW11
-50
0
+50
mV
99
TRACKING BAL WIN T2
VTGW12
-40
0
+40
mV
100
VREG voltage
VREG
3.20
3.45
3.65
V
101
Reference voltage
VREF
-100
0
+100
mV
102
Reference current H
IREFH
-100
0
+100
mV
103
Reference current L
IREFL
-100
0
+100
mV
Reference
Voltage
16
VIDEO-CD 2ND GENERATION
No
Item
KB9224
Symbol
Block
Min
Typ
Max
Unit
Focus
Servo
-100
0
+100
mV
0
+250
+550
mV
104
F.SERVO OFF OFFSET
VOSF1
105
F.SERVO DAC ON OFFSET
VOSF2
106
F.SERVO AUTO OFFSET
VAOF
-65
0
+65
mV
107
F.SERVO AUTO ISTAT
VISTAT2
4.3
-
-
V
108
FERR FEBIAS status
VFEBIAS
-50
0
+50
mV
109
F.SERVO loop gain
GF
19
21.5
24
dB
110
F.SERVO output voltage H
VFOH
4.4
-
-
V
111
F.SERVO output voltage L
VFOL
-
-
0.75
V
112
F.SERVO maximum output
voltage H
VFOMH
3.68
-
-
V
113
F.SERVO maximum output
voltage L
VFOML
-
-
1.32
V
114
F.SERVO osillation voltage
VFOSC
0
+100
+185
mV
115
F.SERVO FEED through
GFF
-
-
-35
dB
116
F.SERVO search voltage H
VFSH
+0.35
+0.50
+0.65
V
117
F.SERVO voltage L
VFSL
-0.65
-0.50
-0.35
V
118
FOCUS full gain
GFSFG
40.5
42.5
45.0
dB
119
F.SERVO AC gain 1
GFA1
19.0
23.0
27.0
dB
120
F.SERVO AC phase 1
PFA1
30
65
90
deg
121
F.SERVO AC gain 2
GFA2
14.0
18.5
23.0
dB
122
F.SERVO AC phase 2
PFA2
30
65
90
deg
123
F.SERVO mutting
GMUTT
-
-
-15
dB
124
F.SERVO AC charac. 1
GFAC1
0.75
0.85
0.95
-
125
F.SERVO AC charac. 2
GFAC2
0.68
0.78
0.88
-
126
F.SERVO AC charac. 3
GFAC3
0.60
0.70
0.80
-
127
F.SERVO AC charac. 4
GFAC4
0.68
0.78
0.88
-
128
F.SERVO AC charac. 5
GFAC5
0.94
1.04
1.14
-
129
F.SERVO AC charac. 6
GFAC6
0.73
0.83
0.93
-
130
T.SERVO DC gain
GTO
13.5
15.0
17.75
dB
131
T.SERVO OFF offset
VOST1
-100
0
+100
mV
132
T.SERVO DAC offset
VTDAC
150
320
550
mV
133
T.SERVO ON offset
VOST2
-250
0
+250
mV
134
T.SERVO AUTO offset
VTAOF
-50
0
+50
mV
135
T.SERVO oscillation
VTOSC
0
+100
+185
mV
136
T.SERVO ATSC gain
GATSC
17.5
20.5
23.5
dB
17
VIDEO-CD 2ND GENERATION
No
Item
KB9224
Symbol
Block
Min
Typ
Max
Unit
GLOCK
17.5
20.5
23.5
dB
137
T.SERVO LOCK gain
138
T.SERVO gain up
GTUP
17.5
20.5
23.5
dB
139
T.SERVO output voltage H
VTSH
4.48
-
-
V
140
T.SERVO output voltage L
VTSL
-
-
0.52
V
141
T.SERVO maximum output
voltage H
VTSMH
3.68
-
-
V
142
T.SERVO minimum output
voltage L
VTSML
-
-
1.32
V
143
T.SERVO JUMP H
VTJH
0.35
0.5
0.65
V
144
T.SERVO JUMP L
VTJL
-0.65
-0.5
-0.35
V
145
T.SERVO DIRC H
VDIRCH
0.35
0.5
0.65
V
146
T.SERVO DIRC L
VDIRCL
-0.65
-0.5
-0.35
V
147
T.SERVO output voltage L
GTFF
-
-
-39
dB
148
T.SERVO AC gain 1
GTA1
9.0
12.5
16.0
dB
149
T.SERVO AC phase 1
PTA1
-140
-115
-90
deg
150
T.SERVO AC gain 2
GTA2
17.5
21.5
25.5
dB
151
T.SERVO AC phase 2
PTA2
-195
-150
-100
deg
152
T.SERVO full gain
GTFG
29.5
32
34.75
dB
153
T.SERVO AC charac. 1
GTAC1
0.59
0.69
0.90
-
154
T.SERVO AC charac. 2
GTAC2
0.75
0.85
0.95
-
155
T.SERVO AC charac. 3
GTAC3
0.65
0.75
0.85
-
156
T.SERVO AC charac. 4
GTAC4
1.30
1.35
1.50
-
157
T.SERVO AC charac. 5
GTAC5
1.15
1.25
1.35
-
158
T.SERVO AC charac. 6
GTAC6
1.01
1.11
1.21
-
159
T.SERVO LOOP MUTT
TSMUTT
-250
0
+250
mV
160
T.SERVO LOOP MUTT AC
TSMTAC
0
+50
+100
mV
161
T.SERVO INT MUTT M1
TSMTM1
0
+50
+100
mV
162
T.SERVO INT MUTT M2
TSMTM2
0
+50
+100
mV
163
T.SERVO INT MUTT M4
TSMTM4
0
+50
+100
mV
164
SL.SERVO DC gain
GSL
20.5
22.5
24.5
dB
165
SL.SERVO FEED through
GSLF
-
-
-34
dB
166
SL.SERVO lock
SLOCK
0
+50
+100
mV
167
SLED forward kick
VSKH
0.45
0.60
0.75
V
168
SLED reverse kick
VSKL
-0.75
-0.60
-0.45
V
169
SLED output voltage H
VSLH
4.48
-
-
V
18
VIDEO-CD 2ND GENERATION
No
Item
KB9224
Symbol
Block
Min
Typ
Max
Unit
VSLL
-
-
0.52
V
170
SLED output voltage L
171
SLED maximum output voltage
H
VSLMH
3.68
-
-
V
172
SLED minimum output voltage
L
VSLML
-
-
1.32
V
173
SP.SERVO 1X gain
GSP
14.0
16.5
19.0
dB
174
SP.SERVO 2X gain
GSP2
19.0
23.0
27.0
dB
175
SP.SERVO output voltage H
VSPH
4.48
-
-
V
176
SP.SERVO output voltage H
VSPL
-
-
0.52
V
177
SP.SERVO maximum output
voltage H
VSPMH
3.68
-
-
V
178
SP.SERVO minimum output
voltage L
VSPML
-
-
1.32
V
179
SP.SERVO AC gain 1
GSPA1
-7.0
-3.5
0
dB
180
SP.SERVO AC phase 1
PSPA1
-120
-90
-60
deg
181
SP.SERVO SMEF gain
GSMEF
13.0
16.5
20.0
dB
182
SP.SERVO AC gain 2
GSPA2
5.5
9.0
12.5
dB
183
SP.SERVO AC phase 2
PSPA2
-120
-90
-60
deg
19
VIDEO-CD 2ND GENERATION
KB9224
AUTO-SEQUENCE
This feature automatically carries out the following commands: Auto-Focus, Track Jump, and Move. During AutoSequence, it Latches the Data when MLT is L, and outputs H when ISTAT is L and at the end.
AUTO FOCUS
Flow CHart
Auto Focus
Focus Search Up
FOK = H
No
Yes
FZC = H
No
Repeat this action
during Blind "E" time
set by Register 5,
until FOK and FZC are
both "H".
Yes
FZC = L
No
Yes
Focus Servo On
End
Timing Chart
The AUTO-FOCUS carries out the Focus Search UP by receiving the Auto-Focus command from MICOM in Focus
Search DOWN status. SSP is Focus Servo ON when the internal FOK and FZC satisfy the all H time set Blind E
(Register $5X) and transfer FZC to L. Then the internal Auto-Focus is finished, and transmitted to MICOM through
the ISTAT output.
20
VIDEO-CD 2ND GENERATION
KB9224
$47 Latch
MLT
FOK
Blind Time, E
FZC
Focus
Output
Focus Servo On
Serach Up
Seach Down
ISTAT
Internal
Status
$02
$03
$03
$03
$08
21
VIDEO-CD 2ND GENERATION
KB9224
1 TRACK JUMP {$48 (FWD), $49 (REV)}
FLOW-CHART
1 Track Jump
Track Jump
Sled Servo Off
$48: Foward Jump
$49: Reverse Jump
Wait Blind "A"
Wait using the WDCK
Standard clock for Blind
"A" time, set by register 5.
(1 WDCK = 0.011 mS)
TRCNT =
?
No
Repeat checks if TRCNT is
continuously "H" at rising
edge of WDCK, during
Blind time "B" set by
Register 5.
Yes
Track REV Jump
Wait Brake "B"
Track, Sled Servo On
End
1 Track Jump Timing Chart
NOTE: Inside () means Reverse.
Track Jump is carried out after receiving $48 ($49), and the blind time and the brake time is set by Register $5X.
22
VIDEO-CD 2ND GENERATION
KB9224
10 TRACK JUMP {$4A (FWD), $4B (REV)}
10 Track Jump
Track FWD Jump
Sled FWD Kickf
$4A: Foward Jump & Kick
$4B: Reverse Jump & Kick
Wait using the WDCK Standard
clock for Blind "A" time, set by
register 5. (1 WDCK = 0.011 mS)
Wait Blind "A"
TRCNT = 5
?
No
Yes
Track REV Jump,
Sled FWD Kick
$4A: Tracking REV Jump & Sled FWD Kick
$4B: Tracking FWD Jump & Sled REV Kick
C = Overflow?
Repeat check the TRCNT 1 period
using the WDCK standard clock to
see if it is longer than the Overflow C
time set by Register 5.
No
Yes
Track, Sled Servo On
End
10 Track Jump Timing Chart {$4A(FWD), $4B(REV), inside () is Reverse}
23
VIDEO-CD 2ND GENERATION
KB9224
$4A ($4B)
MLT
FWD
TRCNT
REV
Blind Time, A
Overflow time C,
Check Trcnt 1 period
Trcnt 5 count
Track
Output
Sled
Output
Tracking Forward Jump
Track Servo On
Reverse Jump
Sled Servo On
Sled Forward Kck
Track Servo On
Sled Servo On
ISTAT
Internal
Status
$25
$2A ($2F)
$2A ($2F)
$2E ($2B)
$25
10 Track Jump carries out Tracking Forward Jump until the Trcnt 5 track count. It carries out Tracking reverse
Jump until one period of Trcnt is longer than the Overflow C select time, then turns the Tracking Servo and Sled
Servo On. This function is to check if the Actuator speed is enough to turn the Servo On.
24
VIDEO-CD 2ND GENERATION
KB9224
2N TRACK JUMP
Flow-Chart
2N Track Jump
Track FWD Jump
Sled FWD Kickf
$4C: Foward Jump & Kick
$4D: Reverse Jump & Kick
Wait using the WDCK Standard
clock for Blind "A" time, set by
register 5. (1 WDCK = 0.011 mS)
Wait Blind "A"
TRCNT = N ?
No
Yes
Track REV Jump,
Sled FWD Kick
$4C: Tracking REV Jump & Sled FWD Kick
$4D: Tracking FWD Jump & Sled REV Kick
C = Overflow?
Repeat check the TRCNT 1 period
using the WDCK standard clock to
see if it is longer than the Overflow C
time set by Register 5.
Yes
Wait Kick "D"
No
$4C: Sled FWD Kick
$4D: Sled REV Kick is continuously
executed for KICK "D" time
Track Servo On
Sled FWD Kick
Track, Sled Servo On
End
25
VIDEO-CD 2ND GENERATION
KB9224
2N Track Jump Timing Chart {$4C(FWD), $4D(REV), inside () is Reverse}
$4A ($4D)
MLT
FWD
TRCNT
REV
Blind Time, A
Overflow time C,
C
Check Trcnt 1 period
Trcnt N count
Track
Output
Sled
Output
Tracking Forward Jump
Track Servo On
Reverse Jump
Sled Servo On
Track Servo On
Sled Forward Kck
Sled Servo On
D
ISTAT
Internal
Status
During D time,
Sled FWD Kick
Q data Read possible
$25+$17
$2A ($2F)
$2A ($2B)
$2E ($2B)
$26
($27)
$25+$18
Similar to 10 track. KICK D time is added to the Sled Kick and carried out. Servo is turned On after Lens Brake
execution.
26
VIDEO-CD 2ND GENERATION
KB9224
M TRACK JUMP {$4E(FWD), $4F(REV)}
FLOW-CHART
M Track Move
Track Servo Off
Sled FWD Kick
$4E: Foward Jump & Kick
$4F: Reverse Jump & Kick
Wait using the WDCK Standard
clock for Blind "A" time, set by
register 5. (1 WDCK = 0.011 mS)
Wait Blind "A"
TRCNT = M ?
No
Count M of Trcnt set by
Register 7
Yes
Track & Sled Servo On
End
M Track Jump Timing Chart {$4E(FWD), $4F(REV), inside () is Reverse}
27
VIDEO-CD 2ND GENERATION
KB9224
$4E ($4F)
MLT
FWD
TRCNT
REV
Blind Time, A
Trcnt M count
Track
Output
Sled
Output
Track Servo On
Tracking Servo Off
Sled Servo On
Track Servo On
Sled Forward Kck
Sled Servo On
ISTAT
Internal
Status
$25
$22 ($23)
$22 ($23)
$22 ($23)
$25
Sled Kick is carried out by counting Trcnt for the set M count value set by Register 7, using the clock.
28
VIDEO-CD 2ND GENERATION
KB9224
FAST SEARCH
FLOW-CHART
Fast Search
Track Servo On
Sled FWD Kick
Wait Blind time "F"
$44: Foward Jump & Kick
$45: Reverse Jump & Kick
Track FWD Jump,
Sled FWD Kick
Wait Blind time "F"
$44: Tracking FWD Jump & Sled FWD Kick
$45: Tracking REV Jump & Sled REV Kick
TRCNT = P ?
No
Count P of Trcnt set by
Register 7
Yes
Track FWD Jump,
Sled FWD PWM Kick
TRCNT = T ?
Yes
Track Servo On
Sled REV Kick
Wait (REV Kick "R")
No
Repeat checks Trcnt, until TRCNT equals T set by
Register 7, like the PD and PW set by Register 6,
PWMs Duty is decided with the PWs PWM 1 period
width used as the period, and PDs High, Low Duty
used as standard 4 bits (number selected from
0~15).
$44: Sled REV Kick
$45: Sled FWD Kick is continuously
executed for KICK "R" time
Track, Sled Servo On
End
29
VIDEO-CD 2ND GENERATION
KB9224
$44 ($45)
MLT
FWD
TRCNT
REV
Blind Time, F
Track
Output
Sled
Output
Blind
K
Trcnt P
count
Trcnt T
count
Kick, R
Tracking Forward Jump
Track Servo On
Sled Servo On
Track Servo On
REV
Kick
Sled Forward Kck
Sled Servo On
PWM
Count
ISTAT
Internal
Status
$25+$17
$26 ($27)
$2A ($2F)
$26
($27)
$25+$18
**** $5XXX FJTS=1: Tracking Forward Jump Changed Tracking Mutting ****
Suggestions for using AUTO-SEQUENCE
•
Tracking Gain Up and Brake On ($17) must be transmitted when carrying out 1, 10, 2n, Track Jump, and Fast
Search.
•
The entire Auto-sequence modes Mlt becomes L, and the Sequence process is carried out at the initial Wdck
Falling Edge after Data Latch.
•
Please judge Play status not by Istat, but by Fok and Gfs.
•
Tracking Gain Up, Brake, Anti-shock and Focus Gain Down are not carried out in Auto-sequence, and needs a
separate command.
•
If the Auto-sequence does not operate as Istat Max Time Over, apply $40 and clear the Ssps internal status,
then try again.
•
The WDCK mentioned above is input from DSP as 88.2 kHz (2x --> 176 kHz).
•
The Auto-sequence internal count differs a little from the actual count.
•
2N and M Track have the potential for errors within the Algorithm, when jumping more than 512 Tracks, so
please try to limit use for Track Jumps within 512.
•
Please limit the use of the Fast-Search Algorithm for more than 512 Tracks.
30
VIDEO-CD 2ND GENERATION
KB9224
AUTOMATIC ADJUST COMMAND
Tracking Balance, Gain Adjust
ADDRESS
ADDRESS
Tracking Balance
$80XX~$81XX
DATA
D11
D10
D9
D8
D7
D6
D5
D4
D3
0
0
0
B5
B4
B3
B2
B1
B0
0
1
1
1
1
1
D4
G4
D3
G3
D2
G2
D1
G1
D0
G0
1
0
0
0
0
Initial Value
Tracking Gain
$81X~$83X
0
0
0
Initial Value
ISTAT
TRCNT
BAL
TRCNT
TGH
TGL
Tracking Balance, Gain Adjust Window
Data
Address
D1
ISTAT
D3
D2
D0
$84X
Tracking Gain
Adjust Window
TRCNT:ISTAT
0-250MV:200MV
1-150MV:300MV
Tracking
Balance Adjust
Window
0:-10MV~15MV
1:-20MV~20MV
Focus. Servo
Offset Adjust
0:OFF, 1:ON
Fe.bias Offset
Adjust
0:OFF,1:ON
Initial Value
0
0
0
0
$841
(F.ERR)
$842
(F.SER)
TRCNT
TRCNT
APC (Automatic Power Control)
Data
Address
$85XX
D7
LDON
APC ON/OFF
0: APC ON
1: APC OFF
D6
PNSEL
APC P/N SEL
0:PSUB
1:NSUB
D5
INTC2
D4
INTC
TRACKING S.
WINDOW MUTT
0
0
1
1
0
1
0
1
11 kHZ ~ 0.7 kHZ
Cpeak Mutting
2.75 kHz ~ 0.7 kHz
5.5 kHz ~ 0.7 kHz
Initial Value
1
0
0
0
Address
D3
D2
D1
D0
FlagSel
FlagCon
FlagInv
Clock
0:Hard Control
0:L falg-SW On
0:FlagB-SW On
0:Lock=1
1:Micom Data
1:H flag-SW Off
1:Flag-SW Off
1:Lock=0,1 by
DSP
0
1
1
1
$85XX
Initial Value
ISTAT
TRCNT
31
VIDEO-CD 2ND GENERATION
KB9224
Register Set 1
Data
Address
$86XX
D7
D6
D5
D4
Focus
Servo
Offset Value
Reset
0:Reset
1:Set
Trcnt
Output
Type
Select
(Monitor=1)
0:Fok
1:Trcnt
Trcnt,
Monitor
Select
1:Fok,TGL
TRCNT
0:TEST
Febias
Focus S.
Offset
Clock
0:46ms
1:5.8ms
1
1
1
INITIAL. Value 1
D3
D2
D1
D0
Flag
Hold
Time
Flag
Hold
Time
Flag
Hold
Time
Flag
Hold
Time
92.8ms
46.4ms
23.2ms
11.6ms
0
1
0
1
TRCNT select is chosen by the MONITOR(D6), TGL is output when Tracking Gain adjust
command ($82X~$83X) is given. Others when FOKSEL is “0”, FOK is output to the TRCNT
pin, when “1” TRCNT is output.
Register Set 2
Data
Address
$87XX
D7
DIRC
DIRC
Setting
0:DIRC
ON
1:DIRC
OFF
Initial Value
1
D6
DIRCI
Febias
Offset
Value
0:Reset
1:Set
1
D5
AGCL1
D4
AGCL2
AGC Level Setting
0 0 1.6V
0 1 1.45V
1 0 1.25V
1 1 1.0V
1
1
D3
ATSCF
Envelope
EFM Slice
mode
controled
by Lock
0:Off
1:ON
0
D2
MT0
D1
MT1
D0
MT2
–
0
0
0
Cpeak
0
0
1
Fscmpo
0
1
0
BALH
0
1
1
Flag
1
0
0
Dfcint
1
0
1
Fecmpo
1
1
0
BALL
1
1
1
LOCKG
1
1
1
32
VIDEO-CD 2ND GENERATION
KB9224
Register Set 3
Data
Address
$8EXX
D7
EC8
D6
EC7
Tracking Servo
Center Peak Freq.
0
1
0
1
Initial Value
0
Register Set
4
0
0
1
1
1.2K
1.3K
1.4K
1.5K
0
D5
EC6
D4
EC5
D3
EC4
D2
EC3
Track
Servo
Phase
Shift
0:Off
1:On
Track
Servo
Gain
Shift
0:Off
1:On
Focus Servo
Center Peak Freq.
0
0
0
0
1
0
1
0
0
1
1
1.2K
1.3K
1.4K
1.5K
0
D1
EC2
D0
EC1
Focus
Servo
Gain
Shift
0:Off
1:On
Focus
Servo
Phase
Shift
0:Off
1:On
0
0
–
Data
Address
$8FXX
D7
TEST
FOK
Defect
Mirror
Output
On/Off
D6
EC10
EFM
ASY
Gain
0: 1X
1: 2X
D5
EC9
D4
TOA4
Envelope
EFM Slice
Gain
0: 2X
1: 1.5X
D3
TOA3
D2
TOA2
D1
TOA1
D0
TOA0
–
Tracking Servo Loop Offset Control
$8F1F(-160mV ) - > $8F00(+160mV)
Monitor Window is same to
Tracking Balance Window
0: On
1: Off
Initial Value
0
0
0
1
0
0
0
0
33
VIDEO-CD 2ND GENERATION
KB9224
TRACKING BALANCE ADJUST CONCEPT
The Tracking Balance Adjust automatically adjusts using the following process: The Tracking error DC offset
extracted from the pre-set DC voltage window level, and the external LPF are comparison monitored by MICOM.
F
RHI
I/V Amp
69
F
beam
Vd
c
E
I/V Amp
70
E
beam
+
RHO
+
-
RLO
AND
Logic
TBAL
30
ISTAT
To MICOM
RLI
Gain Adjust
6 bit Array
MIRROR
D
TZC
Q
29
TRCNT
CK
6 bit (B5~B0)
from MICOM
LPF
Process Summary
Tracking balance adjust is accomplished in the following manner: With the focus On and spindle servo On, the
tracking and sled servo loop is turned off to make the tracking loop into an open loop. The error signal which has
passed through the wide-range pick-up and the tracking error amp, passes through the external LPF to extract the
DC offset. The DC offset is compared with the pre-selected window comparator level to extract the tracking error
amps DC offset within the window, to inform MICOM using the ISTAT that the balance adjust is complete.
At this time, Tracking E beam-side I/V amps gain is selected by MICOM, and the 6-bit resistance arrays resistance
value is selected by the 6-bit control signal.
The values that MICOM applies are 000000XXX-->111111XXX. If you select the switch, TE1s DC offset increases
the (2.5 V-delta V) --> (2.5 V + delta V) one step at a time, to enter the pre-selected DC window level. When it
enters that level, the balance adjust is completed, and the switch condition is latched at this time.
In this adjust process, the TE1 signals frequency distribution is from DC to 2 kHz, so if DC components are
included, the DC offset which passed LPF are not accurate DC values. Therefore, if the frequency of the TE1
signal is above 1 kHz, MICOM monitors the window comparator output. The frequency check at this time monitors
the Trcnt Pin. Balance Adjust completes the adjustment when the TBAL output is H.
Vdc < RLI < RHI
RLI < Vdc < RHI
RLI < RHI < Vdc
RHO
H
H
L
RLO
L
H
H
TBAL (AND gate)
L
H
L
RHI: High level threshold value
34
VIDEO-CD 2ND GENERATION
KB9224
RLI: Low level threshold value
Vdc: Window comparator input voltage
TBAL: Window comparator outputs AND gate output value
Tracking Balance Adjust Example
Out of $8000->$81FFs 64steps, the 22 steps excepting the upper and lower 5 steps, are used ($8040~$81AF).
The limit adjust flow applies the gain to $8300 at the Focus, Tracking ON point, and checks the TRCNTs
frequency. Check if 7 TRCNT came in during 10 ms, and if the answer is YES, check ISTAT, and if NO, repeat the
TRCNT number check 3 times, then go to ISTAT Check.
If the 3x repeat fails as well, increase the balance switch one step.
Also, just in case ISTAT does not immediately go to H when ISTAT Checking, wait 10 ms. Check if it is H after the
3x repeat, and if not, increase the balance switch one step. Adjust the wait mentioned above 10 ms, when the
system is running.
Average the values found by repeating the balance adjust three times.
If only two out of the three tries were successful in getting a balance value, average the two values.
Set as balance switch, this average value, +2. This is because the balance for the system and the minus value for
the DC is stable in the system.
Precision is important in balance adjust, and about 1~2 sec is spent as adjust time, which is accounted for.
35
VIDEO-CD 2ND GENERATION
KB9224
Balance Adjust Flowchart 1
Start :$804
*Settings*
FOCUS On $08
Spindle On CLV-S
Tracking Off $20
Sled Off Gain$830
Balance window
level select
B0 to B5
Switch control.
1 step increase
from $8040 to
$81AF
Other method
1. Can balance afjust while in track mode.
2. Trcnt freq. check is easy in $F3 apply 2X
mode.
-10 ~ +15 mV :$84 X0XX
-20 ~ +20 mV :$84 X1XX
Most select is + 20 mV.
No
TRCNT = 10 ?
during 10 ms
3 times repeat. If failure again after 3
tries, switch cahnge.
Yes
No
ISTAT = H ?
After 10 ms Wait, 3 times repeat check to
see if 10 ms ISTAT = "H".
If failure again after 3 tries, switch
cahnge.
Yes
After current adjust
value +2 step,
Adjust complete
Repeat Balance ADJ 3 times and
average the thrice-repeated balance
switch value to set the balance
switch,. If only 2 repeats out of 3 is
OK, take the average of 2 repeats.
End
36
VIDEO-CD 2ND GENERATION
KB9224
Balance Adjust Flowchart 2
Start :$800
*Settings*
FOCUS On $08
Spindle On CLV-S
Tracking Off $20
Sled Off Gain$830
Balance window
level select
B0 to B5
Switch control.
1 step increase
from $8000 to
$81FF
Other method
1. Can balance afjust while in track mode.
2. Trcnt freq. check is easy in $F3 apply 2X
mode.
-10 ~ +15 mV :$84 X0XX
-20 ~ +20 mV :$84 X1XX
Most select is + 20 mV.
No
1 kHz check
Is TRCNT high
enough?
Yes
No
ISTAT = H ?
Yes
End
When Executing Tracking Balance Adjust
•
The Balance adjust is from $8000 to $81FF, and the Switch Mode is changed one STEP at a time by 16-bit
Data transmission. After Adjust is completed, a separate Latch Pulse is not necessary.
•
If the Trcnt Freq. is not high enough, the Balance can be adjusted at $F3 applied 2x Mode.
•
Here, we have suggested Tracking Off status for the Balance Adjust, but the same amount of Flow can be
Balance adjusted while in Track Move.
•
The Tracking Balance window Select level can be selected by D2 bit out of 12-bit Data. 0: -10 mv ~ +15 mv, 1:
-20 mv ~ +20 mv.
•
When the Tracking Balance Adjust is complete, start the Tracking Gain Adjust.
37
VIDEO-CD 2ND GENERATION
KB9224
Tracking Balance Equivalant Resistor
Fixed R and
TRACKING BALANCE
6Bit Resister matrix
Parallel R
value(440K->0)
DATA
TE1
offset
F Resi
E Resi.
Equa.
Equa.
75K//
6bit
6bit R
µî°¡
13K
27K
56K
110
220
440
K
K
K
NOTE
$800
391K
531K
6.29K
6.87K
1
1
1
1
1
0,1
$801
391K
523.6K
6.47K
7.09K
1
1
1
1
0
0,1
$802
391K
515K
6.68K
7.33K
1
1
1
0
1
0,1
$803
391K
507.5K
6.89K
7.58K
1
1
1
0
0
0,1
$804
391K
500.5K
7.09K
7.84K
1
1
0
1
1
0,1
$805
391K
492.5K
7.33K
8.12K
1
1
0
1
0
0,1
$806
391K
484.8K
7.58K
8.44K
1
1
0
0
1
0,1
$807
391K
477.1K
7.85K
8.77K
1
1
0
0
0
0,1
$808
391K
467.5K
8.21K
9.22K
1
0
1
1
1
0,1
$809
391K
459.7K
8.52K
9.62K
1
0
1
1
0
0,1
$80A
391K
451K
8.88K
10.1K
1
0
1
0
1
0,1
1) 220K//110K=73.33K
$80B
391K
444.8K
9.21K
10.5K
1
0
1
0
0
0,1
2) 56K//27K=18.21K
$80C
391K
437K
9.62K
11.0K
1
0
0
1
1
0,1
3) 27K//13K=8.775K
$80D
391K
429.4K
10.0K
11.6K
1
0
0
1
0
0,1
4) 110K//56K=37.10K
$80E
391K
422K
10.5K
12.2K
1
0
0
0
1
0,1
5) (1)//(2)=14.58K
$80F
391K
413.5K
11.0K
13K
1
0
0
0
0
0,1
6) (3)//(4)=7.09K
$810
391K
398.4K
12.2K
14.6K
0
1
1
1
1
0,1
7) 56K//13K=10.55K
$811
391K
391.6K
12.9K
15.6K
0
1
1
1
0
0,1
8) (1)//(7)=9.223K
$812
391K
383.8K
13.7K
16.8K
0
1
1
0
1
0,1
9) 56K//220K=44.63K
$813
391K
376K
14.6K
18.2K
0
1
1
0
0
0,1
A)56//110/220=31.74K
$814
391K
368.6K
15.6K
19.7K
0
1
0
1
1
0,1
B)13//56//110=9.62K
$815
391K
360.8K
16.8K
21.6K
0
1
0
1
0
0,1
C)(1)//27K=19.73K
$816
391K
353K
18.2K
24K
0
1
0
0
1
0,1
D)27K//110K=21.67K
$817
391K
345K
19.8K
27K
0
1
0
0
0
0,1
E)27K//220K=24.04K
$818
391K
336K
22.3K
31.7K
0
0
1
1
1
0,1
$819
391K
327.9K
24.8K
37.1K
0
0
1
1
0
0,1
$81A
391K
320K
27.9K
44.6K
0
0
1
0
1
0,1
$81B
391K
312K
32.1K
56K
0
0
1
0
0
0,1
$81C
391K
305K
37K
73.3K
0
0
0
1
1
0,1
$81D
391K
297K
44.6K
110K
0
0
0
1
0
0,1
$81E
391K
289K
55.9K
220K
0
0
0
0
1
0,1
$81F
391K
282K
75K
0K
0
0
0
0
0
0,1
13K
252K
F Equav. R
26 K
6.8K
252K
E Equav. R
6bit±¸¼º
38
VIDEO-CD 2ND GENERATION
KB9224
GAIN ADJUSTMENT
F
GH
I
I/V Amp
69
F
beam
Resistance
Array
Vd
c
E
70
E
beam
I/V Amp
Controlled by
5 bit switch
(B4~B0)
from MICOM
+
TGH
+
-
TGL
AND
Logic
TGO
30
ISTAT
To MICOM
GLI
29
TE1
LPFT
TRCNT
TE2
LPF
1 K, 103
Process Summary
The Signal TE1 output by the Tracking Error Amp outputs resistance divide (DC+AC) passes through LPF and the
DC Offset extract signal (DC) difference AMP. Only pure AC components are compared with the pre-selected
Window Comparators Gain select value to carry out the Tracking Gain Adjustment.
The Resistance Divide changes the 5-bit resistance combination with the MICOM Command, to change the Gain.
Tracking Gain Adjustment is carried out in the same conditions as Balance Adjustment, which is: Focus Loop On,
Spindle Servo On, Tracking Servo Off and Sled Servo Off. It adjusts the Tracking Error Amps Gain and the widerage Pick-ups amount of reflection.
The external LPFs Cut-off Frequency is set to 10 Hz ~ 100 Hz.
The Window Comparators comparison level can be chosen from +150 mv ~ +300 mv, and +250 mv ~ +200 mv by
MICOM command.
TGL outputs +150 MV and +250 MV comparator output to TRCNT.
TGH outputs +300 MV and +200 MV comparator output to ISTAT.
Vac < GLI < GHI
GLI < Vac < GHI
GLI < GHI < Vac
TGH
H
H
L
TGL
L
H
H
Gain Adjustment is complete when the output is H.
39
VIDEO-CD 2ND GENERATION
KB9224
When Adjusting the Tracking Gain
•
In Gain Adjustment, the Switch Mode is changed one Step at a time from $83F --> $820 by 12-bit DATA
transmission. A separate Latch Pulse is not needed after Adjust completion.
•
Trcnt and TGL outputs H Duty Check standard is above 0.1 ms.
•
Adjustment is carried out by choosing the most appropriate out of the 4 adjustment modes, including the ones
listed above.
•
The Tracking Balance Window select level can be selected by the D3 bit out of the 12-bit DATA.
0: +250 mv (TGL) ~ +200 mv (TGH)
1: +150 mv (TGL) ~ +300 mv (TGH)
•
When Tracking Gain Adjustment is complete, Tracking & Sled Servo Loop On and TOC Read is initiated.
Start :$83F
*Settings*
FOCUS On
Spindle On
Tracking Off
Sled Off
$08
CLV-S
$20
$830
Gain window level
select
If Gain adjusting after Balance adjustment,
separate environment settings are not needed.
-150 ~ +300 mV :$84 1XXX
+250 ~ +200 mV :$84 0XXX
G0 to G4
Switch control.
32 step decrease
from $83F to $820
No
Is TRCNT high
enough?
Yes
End
Gain Adjust proceeds from Status 1 -->2 -->3 when the MICOM Command carries out Down Command from $83F
--> $820, in order. Adjustment is complete when in Status 2.
Gain Adjustment Method 1
MICOM monitors Trcnts TGL output, and if the outputs H Duty (0.1 ms) is detected, the adjustment is complete. At
this time, the Window Comparator Level is +150 mv ~ +300 mv.
40
VIDEO-CD 2ND GENERATION
KB9224
Gain Adjustment Method 2
MICOM monitors ISTATs TGO output, and if the outputs H Duty (0.1 ms) is detected, the adjustment is complete.
At this time, the Window Comparator Level is +150 mv ~ +300 mv.
Gain Adjustment Method 3
MICOM monitors Trcnts TGL output, and if the outputs H duty (0.1 ms) is detected, the Window Comparator Level
is changed from +150 mv ~ +300 mv to +250 mv ~ +200 mv. And when MICOM again monitors Trcnts TGL output
and the outputs H duty (0.1 ms) is detected, the adjustment is complete. If you latch the former MICOM Command
value and the latter MICOM Command values median, it is possible to Gain adjust +200 mv.
Gain Adjustment Method 4
MICOM monitors Trcnts TGL output, and if the outputs H Duty (0.1 ms) is detected, MICOM Command goes 1
Step Down, and adjustment is completed. At this time, the Window Comparator Level is +150 mv ~ +300 mv.
Gain Adjustment Method 5
Gain Adjustment is set to a total of 32 steps, and Gain Window is set to +250 mv. That is, the process starts at
$83F and carries on to $820. It first sets $83F, monitors the Trcnt Pin and checks if 5 Trcnt were detected during 10
ms. If Yes, adjustment is complete, and if No, carry on lowering the Gain Switch 1 step at a time. Repeat the above
process three times and set the Gain Adjustment Switch with the average value.
Gain Adjustment Flowchart 2
Start :$83F
*Settings*
FOCUS On
Spindle On
Tracking Off
Sled Off
$08
CLV-S
$20
$830
Gain window level
select
If Gain adjusting after Balance adjustment,
separate environment settings are not needed.
-150 ~ +300 mV :$84 1XXX
+250 ~ +200 mV :$84 0XXX
G0 to G4
Switch control.
32 step decrease
from $83F to $820
No
5 TRCNT during
10 ms ?
Yes
End
Average the 3 repeat executions, then
Gain switch setting
41
VIDEO-CD 2ND GENERATION
KB9224
Tracking Gain Equivalant Resistance
Tracking Gain
Data
TERR
TERR
5bit Gain Compared Combination
Tot. Gain
Gain
Ratio
Value
Value
5.0K
5.0K
2.5K
1.25K
0.75K
$83F
0.108
0.036
10.0K
0.375K
1
1
1
1
1
$83E
0.303
0.101
10.0K
1.125K
1
1
1
1
0
$83D
0.419
0.139
10.0K
1.625K
1
1
1
0
1
$83C
0.575
1.191
10.0K
2.375K
1
1
1
0
0
$83B
0.699
0.233
10.0K
2.875K
1
1
0
1
1
$83A
0.798
0.266
10.0K
3.625K
1
1
0
1
0
$839
0.876
0.292
10.0K
4.125K
1
1
0
0
1
$838
0.981
0.327
10.0K
4.875K
1
1
0
0
0
$837
1.048
0.349
10.0K
5.375K
1
0
1
1
1
$836
1.139
0.379
10.0K
6.125K
1
0
1
1
0
$835
1.195
0.398
10.0K
6.625K
1
0
1
0
1
$834
1.273
0.424
10.0K
7.375K
1
0
1
0
0
$833
1.321
0.440
10.0K
7.875K
1
0
0
1
1
$832
1.389
0.463
10.0K
8.625K
1
0
0
1
0
0.477
10.0K
9.125K
1
0
0
0
1
0.496
10.0K
9.875K
1
0
0
0
0
0.506
5.23K
5.375K
0
1
1
1
1
$831
1.431
$830
1.490
96K
/
32K
$82F
1.52
$82E
1.618
3.0
0.539
5.23K
6.125K
0
1
1
1
0
$82D
1.676
Times
0.558
5.23K
6.625K
0
1
1
0
1
$82C
1.755
0.585
5.23K
7.375K
0
1
1
0
0
$82B
1.800
0.600
5.23K
7.875K
0
1
0
1
1
$82A
1.8675
0.622
5.23K
8.625K
0
1
0
1
0
$829
1.907
0.635
5.23K
9.125K
0
1
0
0
1
$828
1.961
0.653
5.23K
9.875K
0
1
0
0
0
$827
1.994
0.664
5.23K
10.375K
0
0
1
1
1
$826
2.040
0.680
5.23K
11.125K
0
0
1
1
0
$825
2.069
0.689
5.23K
11.625K
0
0
1
0
1
$824
2.108
0.702
5.23K
12.375K
0
0
1
0
0
$823
2.133
0.711
5.23K
12.875K
0
0
0
1
1
$822
2.167
0.722
5.23K
13.625K
0
0
0
1
0
$821
2.188
0.729
5.23K
14.125K
0
0
0
0
1
$820
2.219
0.739
5.23K
14.875K
0
0
0
0
0
->
Note
The GAIN ratio
is calculated in
the TE1 pin.
42
VIDEO-CD 2ND GENERATION
KB9224
FEBIAS OFFSET ADJUST
164 K
vb
32 K
va
32 K
59
160 K
sev_stop
FEbias
FE1
+
63
4K
X1 X2 X4 X8
X16
3K
+
+
fcmpo
vc
MICOM sends the Febias Offset Adjust Command $841 to start the adjustment. In the Focus Error Amp Final
output block, the Focus output is compared with the 1/2 Vdd. If the Focus Error Amp output goes above 1/2 VDD,
the Febias offset adjust is completed. The Focus Offset Adjusts voltage change per step is about 17 mv. Transition
is carried out 1 step at a time from 112 mv to -112 mv by the total 5-bit resistance DAC, and after completion,
about -8 mv of Offset is added to 1/2 step. Normally, the Offset distribution after Febias Offset adjust is between -8
mv ~ +8 mv. The design is such that after Focus Offset, you have the option to vary the Febias by turning On the
switch that connects the exterior and interior of the Febias block (pin 63). This Control signal is Sev_stop, and it is
switched On after Focus Servo Offset adjust.
When Febias block is Open, the Focus Error Offset remains unchanged, the same as Febias Adjust Offset. The
time spent per step is 5.8 ms, and since there are 5 bits, a total of 32 steps and maximum 256 ms can be spent.
The Adjustment is carried out by Hardware, and it transitions from Minus Offset to Plus Offset.
For Febias Offset Readjust, 4-bit DAC is Reset by $878, and Reset can be canceled only when the $87F-applied
D2 bit goes from 0 --> 1.
In order to prevent system errors such as static electricity, the Febias DAC Latch Blocks Reset is not carried out by
the RESET block (System Reset), but by MICOM DATA.
43
VIDEO-CD 2ND GENERATION
KB9224
Example of System Control Program
DISC CHANGE
POWER ON
DISC TRAY
CHECK
CLOSE
OPEN
REPLAY
LOADING
TIME
100ms maxious
100ms maxious
Focus error febias Auto Adjust Start
$878+$87F+$841 Transmit
Focus offset cancel Auto Adjust Start
$08+$867+(200ms wait)+
$86F+$842 Transmit
After 100ms
ISTAT L->H ?
After 100ms
ISTAT L->H ?
Tracking offset cancel Auto Adjust Start
$8F1X->$8F0X(ISTAT->H)
LASER DIODE ON
LD ON,P-SUB $854 Transmit
Befor check 86F p41-> sstop
LIMIT SW CHECK
After check 86B p41-> defect
2s maxious
FOCUSING
Auto-Focusing $47 Transmit
NO
FOCUS OK ?
FOK H?
NO
YES
YES
Spindle Servo Loop On
Tracking&Sled loop Off
$20 Transmit
300ms maxious
LASER OFF
$85C Transmit
DISPLAY
( NO DISC )
Tracking Balance
Adjust
STANDBY
Tracking Gain
Adjust
TOC READ
Complete ?
TRY COUNT
3 ?
FAI L
LASER OFF
$85C Transmit
PASS
DISC 8/12Cm
Check
DISPLAY
( ERROR ), TRAY OPEN
STANDBY
PLAY BACK
FEbias Offset Setting
44
VIDEO-CD 2ND GENERATION
KB9224
* Application when adjusting offset from
0 mV ~ +100 mV
* Application when adjusting offset from
-100 mV ~ 0 mV
VDD (5 V)
FEBIAS
Rx
FEBIAS
4K
Optional Offset Voltage
(Voff)
Rx
VDD/2
Rx
VDD/2
VDD - VDD/2
( Rx + 4 K )
= Voff
Example) When Power is 5 V
( 5 - 2.5 ) V
( Rx + 4 K )
4 K = Voff
10 K
( Rx + 4 K )
= Voff
Focus Offset Adjust
MICOM sends the Focus Offset Adjust Command $842 to start the adjustment. In the Focus Error Amp Final
output block, the Focus output is compared with the 1/2 Vdd. If the Focus Error Amp output goes above 1/2 VDD,
the Focus offset adjust is completed. The Focus Offset Adjusts voltage change per step is about 40 mv. Transition
is carried out 1 step at a time from 320 mv to -320 mv by the total 4-bit resistance DAC, and after completion, about
+20 mvdml of Offset is added to 1/2 step. Normally, the Offset distribution after Focus Offset adjust exists between
-20 mv ~ +20 mv. The design is such that after Focus Offset, you have the option to vary the Focus by turning On
the switch that connects the exterior and interior of the Focus block (pin 63).
When Febias block is Open, the Focus Error Offset is the same as Febias Adjust Offset. The time spent per step is
5.8 ms, and since there are 4 bits, a total of 16 steps and maximum 128 ms can be spent. Also, Lens-collisionsounds can be generated when adjusting the pick-up with a sensitive Focus Actuator, so the Time division that
uses 46 ms per step, spending a total of 736 ms, is used. That is carried out by setting the $86Xs lowest D0 bit to
0. The Adjustment is carried out by Hardware, and it goes from Minus Offset to Plus Offset.
For Febias Offset Readjust, 4-bit DAC is Reset by $878, and Reset can be canceled only when the $87F-applied
D2 bit goes from 0 --> 1.
In order to prevent system errors such as static electricity, the Focus DAC Latch Blocks Reset is not carried out by
the RESET block (System Reset), but by MICOM DATA.
FEBIAS Adjust
FEBIAS OFFSET is automatically adjusted from 0 mV, and can be adjusted from the exterior at +/-100 mV. When
adjusting the FEBIAS at 0 mV ~ +100 mV, Rx connect to VDD, and if adjusting the FEBIAS at -100 mV ~ 0 mV, Rx
connect to GND.
After FEBIAS OFFSET automatic adjust is complete, the FEBIAS external resistance and FOCUS ERROR internal
resistance is connected, so adjusting Pin 63 (FEBIAS) to an optional OFFSET value is possible.
45
VIDEO-CD 2ND GENERATION
KB9224
Pg. 39
11. RF SUMMING AMPLIFIER APPLICATION
The internal switch is for selecting the 1, 2x speed-related filter. It is On when 1x, and Off when 2x. Please adjust
the according to the Set.
BOOSTC2
300 pF
250 pF
76
RF-
58 K
58 K
1K
78
PDA 65
+
58 K
PDC 66
RFL
2K
+
58 K
58 K
0.39 K
2 pF
77
VC
2 pF
RFO
3.9 K
79
PDB 67
+
58 K
PDD 68
2K
vc
VC
46
VIDEO-CD 2ND GENERATION
KB9224
RF EQUALIZE & AGC
Vin(t)
Vo(t)
Modulator
Vcagc(t)
Ablout 3X Gain
AMP
HPF
(3 dB: 50 kHz)
ARF-AGC
Output
I/V Converter
Control Range I*10 K
+
Vp
Full Wave
Rectifier
(RF peak envelope)
Vn
The Modulator output is the product of the input and Vcagcs Tanh Term. It goes through about 3x of Gain Blocks,
then is output to the ARF Pad. The output goes through the HPF with the pole frequency of 50 kHz, then is fullwave rectified to follow-up the RF Levels Peak Envelope.
At this time, the HPFs Pole frequency is set to 50 kHz so that the 3t~11t frequency components can pass without
diminution. After full-wave rectification, the RF levels Peak value is integrated to the 115pf CAP Node. If this peak
voltage is smaller than the pre-determined voltage, it outputs a sinking current, and if larger, it outputs a sourcing
current. The maximum current peak value is 10 uA, and this current is I/V converted and applied as a Modulator
Control Voltage.
When Sinking, the voltage of Vcagc is increased up to Iout x 10 K and multiplied with Tanh(1-X), and when
Sourcing, the voltage of Vcagc is decreased to Iout x 10 K and multiplied with Tanh(1+X). At this time, X is (Vcagc/
2Vt).
Overall, after detecting the 3t and 11ts level by full-wave rectification, it is compared to Tanh using the Modulator
and multiplied to the Gain to realize the wave-form Equalize. The above is related to the AGC concept, which
means that a specific RF level is always taken.
OTHER BLOCK
13.1 TRACKING ERROR AMPLIFIER
The Side Spot Photo Diode current which is input into blocks E and F, goes through the E Loop I-V and F Loop I-V
Amp. It is then converted into voltage, in order to gain the difference signal in the Tracking Error Amp. It is MICOM
47
VIDEO-CD 2ND GENERATION
KB9224
programmed so that the balance is adjusted in E block, and gain is automatically adjusted in Te1.
TE1
54
F
69
TE2
53
LPFT
55
WIN COMP
I/V Amp
+
E
70
B_REF_CNTR
29
TRCNT
I/V Amp
WIN COMP
16R 8R 4R 2R R
G_REF_CNTR
BAL [4:0]
Gain Up/down
GAIN [4:0]
FOCUS OK CIRCUIT
The Focus OK Circuit compares the DC difference value between the Rfi and Rfo blocks to the standard DC value.
If the Rf level is above standard, Fok outputs L->h to make a Timing Window for turning the Focus On during Focus
Search status.
40 K
40 K
RFO
79
40 K
RFI
80
57 K
40
+
90 K
FOKB
+
VC+0.625 V
MIRROR CIRCUIT
The Mirror signal amplifies the RFI signal, than Peak and Bottom Holds it. Peak Hold can follow-up on Defect-type
Traverse, and Bottom Hold can follow-up on Rf Envelope to count the Tracks. The Mirror output is the following: L
48
VIDEO-CD 2ND GENERATION
KB9224
within Disc tracks, H between tracks, and H when a defect above 1.4 ms is detected.
38 K
+
80 k
17 K
IRF
1.5 K
8
MCP
39
MIRROR
17 K
+
80
+
Peak and
Bottom Hold
96 K
19 K
+
EFM COMPARATOR
The EFM Comparator makes the Rf signal into a secondary signal. The Asymmetry generated by a fault during
Disc production cannot be eliminated by only AC coupling, so control the standard voltage of the EFM Comparator
to eliminate it.
ENVO
17
ENVR
RFI
15
3
ENC
16
RF envelope detect and
asymmetry / envelope DC
compensation and slice AC level
summing system
Compensation Asy. DC
+
X5
33
ASY
32
EFM2
31
EFM
40 K
DEFECT CIRCUIT
After Rfo signal inversion, Bottom Hold is carried out using only , , 2 . Except, the Bottom Hold of Holds the
coupling level just before the coupling. Differentiate this with the Coupling, then Level Shift it. Compare the signals
49
VIDEO-CD 2ND GENERATION
KB9224
to either direction to generate the Defect detect signal.
DCC1
12
DCC2
11
75 K
37.5 K
RFO
79
Bottom
Envelope
Hold
+
28 K
75 K
VC+0.6254 V
43 K
VC
+
24
DEFECT
Bottom
Envelope
Hold
9
DCB
APC CIRCUIT
If you operate the Laser Diode in constant current, since it has a negative temperature characteristic with a large, it
is controlled by the Monitor Photo Diode so that the output is kept regular.
LDON
PN
150 K
PD
71
+
-
+
-
0.75 K
72
150 K
150 K
300 K
5.5 K
13.7 Center Voltage Generation Circuit
This circuit makes the Center Voltage using the Resistance Divide.
30 K
+
73
VC
30 K
50
VIDEO-CD 2ND GENERATION
KB9224
13.8 Rf Equalize Circuit
The AGC block maintains a steady Rf Peak to Peak level, and has a built-in 3t gain boost function. It detects the Rf
Envelope and compares it with the standard voltage to perform comparison gain adjustment.
The received Rf output stabilizes the Rf Level to 1vp-p, and this output is applied as the EFM Slice input.
CAGC
6
1
Equalize
VCA
EQI
4
ARF
13.9 ATSC
The Detect Circuit for the Tracking Gain Up (about Shock) is composed of a Window and a Comparator.
+
-
51
BPF
ATSC
Tracking Gain
Up
+
13.10 Focus Servo
If set to phase compensate the Focus Servo Loop, the Focus Servo Loop is Muted when Defect is H. At this time,
the Focus Error signal is integrated by the 0.1 uf Capacitor to be connected to the Fdfct block, and the 470
resistance. It is then output through the Servo Loop. Therefore, during Defect, the Focus Error output is Held as the
Error value before the Defect Error. The frequency which maximizes the Focus Loops phase compensation is
changed by the Fset block. If the resistance is 510 kohm, the maximum frequency is 1.2 kHz, and is inversely
proportional to the resistance.
When in Focus Search, Fs4 is On to intercept the Error signal. The Focus Search signal is output through the Feo
block. When Focus is On, Fs2 is On, and the Focus Error signal input through the Fe2 block is output to the output
pin through the Loop.
51
VIDEO-CD 2ND GENERATION
KB9224
FSET
13
3.6 K
VC
3.6 K
FE2
+
+
+
FZCI
To Digital
48
FEO
47
FE-
58
20 K
FDFCT 60
DFCT1
48 K
82 K
Focus Phase
Compensation
+
FS4B
160 K
40 K
FS2B
FGD
27
470 K
10 K
40 K
50 K
46 K
FS3
5K
26
580 K
+
FS3
25
FS1
10
FLB
FRCH
TRACKING SERVO
After Tracking Servo Loops Phase compensation and during Defect, the Tracking Error signal is integrated through
470 k resistance and the 0.1 uf Capacitor, then output through the Servo Loop. Rtg and Tg2 blocks are Tracking
Gain Up/Down exchange blocks. In Phase Compensation, like Focus Loop, the Peak frequency of the phase
compensation is varied by the Fset block. If the resistance connected to the Fset block changes, the Op Amp
Dynamic Range and the Offset change as well.
52
VIDEO-CD 2ND GENERATION
TE2
KB9224
53
TM4
470 K
TDFCT 57
680K
49
TE-
50
TEO
TM3
680K
DFCT1
TG1
TG1B
68 pF
10 K
TM1
110 K
20 K
TGU
61
Tracking Phase
Compensation
10 K
90 K
TM7
+
82 K
TG2
62
TG2B
470 K
13
FSET
The Tm7 Switch is a Brake Switch which turns the Tracking Loop On/Off when the Actuator is unstable after a
Jump. After the Servo has jumped 10 tracks the Servo Circuit is out of the liner range, and sometimes the Actuator
follows an unstable track. So this prevents unnecessary jumping caused by unwanted Tracking Errors. Tg2 and
Tgu blocks adjust the Tracking Servo Loops high frequency Gain. It adjusts the gain of the wanted frequency band
zone through the external Cap.
SLED SERVO
This servo integrates the Tracking Servo output to move the pick-up. Also, during Track movement, it outputs Sled
Kick voltage for the Track Jump along the Sled axis.
43
SLO
44
SL-
42
SL+
TM6
TM7
+
TM2
53
VIDEO-CD 2ND GENERATION
KB9224
SPINDLE SERVO & LOW PASS FILTER
200 Hz Lpf is configured by the 20 k resistance and 0.33 uf Cap in order to eliminate carrier components. Fsw
becomes Low in Clv-s mode, so more powerful filter movements are carried out.
22 K
SMON
22 K
22
220 K
15 K
SMDP
220 K
50 K
+
-
+
21
20 K
220 K
15 K
46
SPDLO
45
SPDL-
100 K
220 K
FVCO
Double Speed
ITEM1. Mirror Mute (Used for Tracking Mute Only)
This circuit is used as an ABEX-725A countermeasure, which handles Tracking Muting when Mirror is detected. Its
MIN and MAX are set, and it detects a minimum of 11 kHz to a maximum of 700 Hz.
Except, Mute does not function in the following four cases.
When transmitting a MICOM tracking gain up command (TG1, TG2 = 1)
When Anti-shock is detected (ATSC)
When LOCK falls to L
When DEFECT is detected
Miiror Mute Operating / APC P-sub
APC On
APC Off
Interruption On (Mirror 11 kHz~0.7 kHz)
$854X
$85CX
Interruption Off
$855X
$85DX
Interruption On (Mirror 2.75 kHz~0.7 kHz)
$856X
$85EX
Interruption On (Mirror 5.5 kHz~0.7 kHz)
$857X
$85FX
ITEM2, TRCNT Output
TRCNT is an output generated by Mirror and TZC. Mirror is a Track Movement Detect output by the Main Beam,
and TZC is a Track Movement Detect output by Side Beam. TRCNT receives these 2 inputs and determines if the
Pick-up is currently moving inwards or outwards to use it when in Tracking Brake of $17.
54
VIDEO-CD 2ND GENERATION
MIRROR
TZC
KB9224
D
TZC edge detect by
inverter elay TZC
rising, falling detect
Q
TZC Output
Mirror value is output at
TZC rising, falling detect
CK
55