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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
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VIDEO-CD 2ND GENERATION
KB9224
PIN CONFIGURATION
BOOSTC2 IVSEL VCC PDD PDC 66 RFO PDB PDA 65 RFL RFIRF VR PD LD
E 70
80
79
78
77
76
75
74
73
72
71
69
F
68
EQI EQI2 RFI ARF2 MOC CAGC GND MCP DCB FRSH DCC2 DCC1 FSET VDDA ENBR ENC ENVO ISET VREG WDCK SMDP SMON SMEF DEFECT
67
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
64 63 62 61 60 59 58 57 56 55 54 53
DVEE FEBIAS TG2 TGU FDFCT FE1 FE2 TDFCT DVDD LPFT TE1 TE2 TZC ATSC TEO TEFEO FESPDLO SPDLSLSLO SL+ SSTOP
KB9224
52 51 50 49 48 47 46 45 44 43 42 41
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39 MIRROR
TRCNT
ISTAT
LOCK
EFM
ASY
VSSA
MDATA
RESET
EFM2
MLT
FGD
FLB
FS3
MCK
FOK
40
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VIDEO-CD 2ND GENERATION
KB9224
PIN DESCRIPTION
No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Pin Name EQI EQI2 RFI ARF ARF2 CAGC GND MCP DCB FRSH DCC1 DCC2 FSET VDDA ENBR ENC ENVO ISET VREG WDCK SMDP SMON SMEF DEFECT FLB FS3 FGD LOCK TRCNT ISTAT EFM I/O I I I O O I G I I I O I I P I I O I O I I I I O I I I I O O O RF AGC & Eqaualize input pin RF AGC & Equalize input connect switch (controled by Flag) EFM COMPARATOR input pin RF AGC & EQ output pin. RF AGC & EQ output connect pin (controled by Falg) AGC_EQUALIZE LEVEL control pin, VCA input pin & NOISE eliminating CAP pin Ground (RF block) Half-wave rectifier CAP pin for MIRROR output DEFECT MAX DUTY limiting CAP pin FOCUS SEARCH generating & charge/discharge CAP pin DEFECT MIN DUTY generating DC eliminating CAP pin. (connected DCC1) DEFECT MIN DUTY generating DC eliminating CAP pin (connected DCC2) FCOUS,TRACKING,SPINDLE PEAKING frequency compensation BIAS pin 5V POWER pin for SERVO BIAS pin for ENVELOPE EFM-SLICE RF ENVELOPE DC BIAS extract voltage input pin RF ENVELOPE output pin FOCUS SERARCH,TRACKING JUMP, SLED KICK voltage generating BIAS pin 3.4 V REGULATOR output pin 88.2KHz input pin from DSP SMDP input pin of DSP SMON input pin of DSP External LPF time constant connection pin of CLV servo error signal DEFECT output pin. CAP pin for FOCUS LOOP rising low band FOCUS LOOP' high frequency gain adjustment pin s FOCUS LOOP' high frequency gain adjustment pin s SLED RUN AWAY preventing pin (L: Sled Off and Tracking Gain Up) Track Count output pin INTERNAL STATUS output pin RFO SLICE EFM output pin (to DSP) Description
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VIDEO-CD 2ND GENERATION
KB9224
PIN DESCRIPTION (Continued)
No. 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 Pin Name EFM2 ASY VSSA MCK MDATA MLT RESET MIRROR FOK SSTOP SL+ SLO SLSPDLSPDLO FEFEO TETEO ATSC TZC TE2 TE1 LPFT DVDD TDFCT FE2 FE1 FDFCT TGU TG2 FEBIAS I/O O I G I I I I O O I I O I I O I O I O I I I O I P I I O I I I I Description EFM comparator integrating output pin AUTO asymmetry control input pin SERVO part analog VSSA power supply PIN MICOM clock pin DATA input pin DATA LATCH input pin RESET input pin MIRROR detect output pin FOCUS OK output pin PICK UP's maximum lead-in diameter position check pin SLED SERVO non-inverting input SLED SERVO output SLED SERVO inverting input SPINDLE AMP inverting input pin SPINDLE AMP output pin FOCUS SERVO AMP inverting input pin FOCUS SERVO AMP output pin TRACKING SERVO AMP inverting input pin TRACKING SERVO AMP output pin ANTI-SHOCK input pin TRACKING ZERO CROSSING input pin TRACKING SERVO input pin TRACKING ERROR AMP output pin TRACKING ERROR integrating input pin (Auto adjust) LOGIC DVDD power supply pin DEFECT TRACKING ERROR integrating CAP connection pin FOCUS SERVO input pin FOCUS ERROR AMP output pin When DEFECT, FOCUS ERROR integrating CAP connection pin High frequency TRACKING GAIN SWITCHING CAP connection pin Time constant controlling TRACKING LOOP's high frequency gain control pin FOCUS ERROR BIAS control connect pin
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VIDEO-CD 2ND GENERATION
KB9224
PIN DESCRIPTION (Continued)
No. 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 Pin Name DVEE PDA PDC PDB PDD F E PD LD VR VCC IVSEL BOOSTC2 RFL RFRFO IRF I/O G I I I I I I I O O P I I I I O I LOGIC DVEE power supply pin POTO-DIODE A & RF I/V AMP1 inverting input pin POTO-DIODE C & RF I/V AMP1 inverting input pin POTO-DIODE B & RF I/V AMP2 inverting input pin POTO-DIODE D & RF I/V AMP2 inverting input pin POTO-DIODE F & TRACKING (F) I/V AMP inverting input pin POTO-DIODE F & TRACKING (E) I/V AMP inverting input pin APC AMP input pin APC AMP output pin (VCC+GND)/2 VOLTAGE REFERENCE output pin RF PART VCC power supply pin Pick-UP Type Select pin(Default Pull Down) RF SUMMING AMP 3T BOOST's CAP connection pin (connected GND) RF SUMMING AMP NOISE eliminating CAP connection pin (connected RFO) RF SUMMING AMP inverting input pin RF SUMMING AMP output pin RFO DC eliminating input pin (Used in MIRROR, FOK pin) Description
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VIDEO-CD 2ND GENERATION
KB9224
MICOM COMMAND ($0X, $1X) Item Focus Control Tracking Control Address Symbol 0000 0001 D3 D2 Data D1 D0 ISTAT Output FZC ATSC
FS4 FS3 FS2 FS1 Focus On Gain Down Search On Search Up AntiShock Brake On TG2 Gain Set TG1 Gain Set
Tracking Gain Setting for Anti-Shock D7 D6 D5 D4 0 0 0 0 1 AntiShock Off D3 Anti-Shock 1 AntiShock On Hex TG2 Tracking Gain Control TG1, TG2=1 GAIN UP $10 $11 $12 $13 $14 $15 $16 $17 $13,$17,$1B,$1F (AS0) $13,$17,$18,$1C (AS1) TRACKING GAIN UP At this time, MIRROR MUTTING is OFF $18 $19 $1A $1B $1C $1D $1E $1F 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 D2 Lens. Brake 0 Lens Brake Off 1 Lens Brake On AS=0 TG1 0 0 1 1 0 0 1 1 1 1 0 0 1 1 0 0 TG2 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 D1 TG2 (D3=1) 0 High Freq. Gain 1 High Freq. Gain 0 D0 TG1 1 ATSC ISTAT Output
Normal Gain Gain Up
Item
AS=1 TG1
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VIDEO-CD 2ND GENERATION
KB9224
$2X D7 0 D6 0 TM1 0 1 Track. Servo Off Track. Servo On TM2 0 1 TM4 0 0 0 TM4 0 0 0 Sled. Servo Off Sled. Servo On TM3 0 0 0 TM3 0 0 0 D5 1 D4 0 Mode $20 $21 $22 $23 $24 $25 D3 D2 D1 D0 ISTAT Output TM1 0 0 0 0 1 1 1 1 0 0 0 0 0 0 0 0 TZC
Tracking Servo Mode TM7 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 TM6 0 0 0 1 0 0 0 1 0 0 0 1 0 0 0 0 TM5 1 1 0 1 1 1 0 1 1 1 0 1 1 1 0 0 TM4 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1
Sled Servo Mode TM3 1 1 1 1 1 1 1 1 0 0 0 0 1 1 1 1 TM2 1 0 1 1 1 0 1 1 1 0 1 1 1 0 1 1
Track. Kick $26 FWD. Jump $27 Jump Off $28
REV. Jump $29 Sled. Kick FWD. Kick Kick Off REV. Kick $2A $2B $2C $2D $2E $2F
TM7 (Jump) 1 Lens Brake On
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VIDEO-CD 2ND GENERATION
KB9224
Tracking Condition for DIRC (Direct 1 Track Jump) Item Hex DIRC=1 TM[6:1} Tracking Mode $20 $21 $22 $23 $24 $25 $26 $27 $28 $29 $2A $2B $2C $2D $2E $2F Resistor $3X Focus Search Address D11 D10 D9 Sled Kick D8 Flag Detect Reference D7 D6
D7 D6 Defect Duty 0 0 0.45ms 0 1 0.54ms 1 0 0.63ms 1 1 0.73ms
DIRC=0 TM[6:1} 001000 001010 011000 101000 000100 000110 010100 100100 001000 001010 011000 101000 000100 000100 000100 100100
DIRC=1 TM[6:1} 000011 000011 100001 100001 000011 000011 100001 100001 000011 000011 100001 100001 000011 000011 100001 100001
000000 000010 010000 100000 000001 000011 010001 100001 000100 000110 010100 100100 001000 001010 011000 101000
D15~D12 0011
PS4 Search+2
PS3 Search+1
PS2 Kick+2
PS1 Kick+1
Initial Address AFRC D5 D15~D12 0011 Initial
NOTES: Equalize 3T input Gain 0: 1X 1: 1.5X
0 SPEAK D4
Peaking prevent standard freq. 0: 44 kHz 1: 88 kHz
1 TOCD D1 RFS D0
Focus Servo Cprak Muting 0: Off 1: ON
MODEC D3
EFM.SLICE 0: ENVEL. 1: NORMAL
On/Off D2
Peaking prevent On/Off 0: 44 kHz 1: 88 kHz
TRACKING offset adjust 0: OFF 1: ON
0
1
1
0
1
0
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VIDEO-CD 2ND GENERATION
KB9224
1. 2. 3. 4. 5.
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 D0 ISTAT SSTOP
Focus Servo Search Level Control 0 0 1 1 PS4 Search +2 Search X1 DATA MODE (LEVEL) Search X2 Search X3 Search X4 DATA S.X1, K.X1 $30 PS3 Search +1 $30 ~ $33 $34 ~ $37 $38 ~ $3B $3C ~ $3F S.X2, K.X2 $35
Sled Servo Kick Level Control PS2 Kick +2 Kick Kick Kick Kick X1 X2 X3 X4 PS1 Kick +1 $30,$34,$38,$3C $31,$35,$39,$3D $32,$36,$3A,$3E $33,$37,$3B,$3F S.X4, K.X4 $3F
S.X3, K.X3 $3A
Auto Sequence Mode ADDRESS 0 1 0 0 D3 0 0 1 1 1 1 0 D2 0 1 0 0 1 1 1 DATA D1 0 1 0 1 0 1 0 0: FWD 1: REV D0 0 1
Auto-Sequence Cancel Auto-Focus 1-Track Jump 10-Track Jump 2N-Track Jump M-Track Jump Fast Search
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VIDEO-CD 2ND GENERATION
KB9224
RAM Resistor Set Item Address
BLIND A, E $5XX OVERFLOW. C BRAKE. B FAST FAST F K INI KICK D FAST R PWM DUTY PD PWM WIDTH PW INI. 2N TRA N M TRA. M FAST SEARCH T $7XXX $7XXX INI. BRAKE POINT P $BXXX INI. NOTES: 1. 0 4096 1638 4 0 1638 4 0 1 2048 8192 0 8192 0 1 1024 4096 0 4096 0 1 512 2048 0 2048 0 1 256 1024 0 1024 0 0 128 512 0 512 0 1 64 256 1 256 1 0 32 128 1 128 1 $6XXX 1 11.6 ms 23.2 ms 0 5.80 ms 11.6 ms 1 2.90 ms 5.80 ms 0 1.45 ms 2.90 ms 8 4 2 1 5.80 ms 0 16 64 1 64 1 2.90 ms 0 8 32 1 32 0 1.45 ms 1 4 16 1 16 0 0.75 ms 0 2 8 1 8 0
Data D11
0.18 ms 0.36 ms 23.2 ms
D10
0.09 ms 0.18 ms 11.6 ms
D9
0.04 ms 0.09 ms 5.80 ms
D8
0.02 ms 0.04 ms 2.90 ms
D7
D6
D5
D4
D3
D2
D1
D0
I/V->1: Current Type 58K SHORT T.RST->1: Adjust value RESET 0.72 ms 1 0.36 ms 0 0.18 ms 0 0.09 ms 0 I/V SEL 0 T.RST adjust 0 EFMB C 0 FJTS 0
EFMBC:0-Single Asy compensation 1-Double ASY compensation FJTS: 0:Track mutt off Fast Search 1:Track mutt on Fast Search
Warning 1. 2. 3. 4. Out of the 16 settings, PWM Width (PW) can select only one of 1, 2, 4, or 8 (not a 4-bit mixture) When using a 2N Track or an M Track, more than 512 Tracks is not recommended (potential for error within the algorithm) There can be a 1~2 error in the PWM Duty (PD), so set to fixed value + 2 $5XXXs I/V SEL command (0: pick-up configuration using both voltage and current, 1: current-type only)
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VIDEO-CD 2ND GENERATION
KB9224
ABSOLUTE MAXIMUM RATINGS
Item Supply Voltage Operating Temperature Storage Temperature Permissible Loss Vmax TOPR TSTG Pd - 20 - 55 Symbol Min Typ 5 25 25 150 70 150 Max Unit V C C mW
ELECTRICAL CHARACTERISTICS
No 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
Item Supply current 6v Supply current 5v Supply current 4v RF AMP offset voltage RF AMP Oscillation voltage RF AMP voltage gain RF AMP voltage gain 2 RF RHD charac. RF AMP maximum output voltage RF AMP minimum output voltage 1X RF AC charac. 2X RF AC charac. RF AC coupling charac. RF AC coupling charac. 2 RF IVSEL connection charac. AC RF IVSEL connection charac. BD RF IVSEL connection charac. AC2 RF IVSEL connection charac. BD2
Symbol ICCHI ICCTY ICCLO Vrfo Vrfosc Grf Grf2 RFTHD Vrfpp1 Vrfpp2
Block Supply current
Min 20 15 10 -85 0 16.2 16.2 3.8 -
Typ 40 32 25 0 50 19.2 19.2 1.50 1.25 1 0.5 55 55 110 110
Max 60 50 40 +85 100 22.2 22.2 5 2.0 2.0 4.0 1.3 0.8 75 75 150 150
Unit mA mA mA mV mV dB dB % V V Kohm Kohm Kohm Kohm
RF AMP RFAC1 RFAC2 RFAC3 RFAC4 RFSELAC RFSELBD RFSELAC2 RFSELBD2 RF Boost Option 1.00 0.50 0.7 0.2 35 35 70 70
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VIDEO-CD 2ND GENERATION
KB9224
No 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35
Item FOCUS ERROR OFFSET voltage FOCUS ERROR AUTO voltage ISTAT after FEBIAS adjust FOCUS ERROR voltage gain 1 FOCUS ERROR voltage gain 2 FOCUS ERROR voltage gain difference FOCUS ERROR AC difference FERR maximum output voltage H FERR minimum output voltage L AGC max. gain AGC EQ gain AGC normal gain AGC compress ratio AGC frequency AGC level control 1 AGC level control 2 AGC level control 3
Symbol VFEO1 VFEO2 VISTAT1 GFEAC GFEBD Delta GFE VFEACP VFEPPH VFEPPL GAGC GEQ GAGC2 CAGC FAGC AGCL1 AGCL2 AGCL3
Block
Min -525 -35 4.3 18
Typ -250 0 21 21 0 50 19 1 6 2.5 0 1.15 1.15 1.15
Max -50 +35 24 24 +3 100 0.6 22 2 9 5 2.5 1.3 1.3 1.25
Unit mV mV V dB dB dB mV V V dB dB dB dB dB -
Focus Error AMP
18 -3 0 4.4 16 0 3.0
RF AGC & Equalizer
0 -1.5 1.03 1.0 1.0
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VIDEO-CD 2ND GENERATION
KB9224
No 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65
Item TERR gain voltage gain 1 TERR gain voltage gain 2 TERR gain voltage gain 3 TERR gain voltage gain 4 TERR gain voltage gain 5 TERR gain voltage gain 6 TERR gain voltage gain 7 TERR balance gain TERR balance mode 1 TERR balance mode 2 TERR balance mode 3 TERR balance mode 4 TERR balance mode 5 TERR balance mode 6 TERR EF voltage gain difference TERR maximum output voltage H TERR minimum output voltage L APC PSUB voltage L APC PSUB voltage H APC NSUB voltage L APC NSUB voltage H APC PSUB voltage LDOFF APC NSUB voltage LDOFF APC current drive H APC current drive L MIRROR minimum operting freq. MIRROR maximum operting freq. MIRROR AM charac. MIRROR minimum input voltage MIRROR maximum input voltage
Symbol GTEF1 GTEF2 GTEF3 GTEF4 GTEF5 GTEF6 GTEF7 GTEE TBE1 TBE2 TBE3 TBE4 TBE5 TBE6 Delta GTEF VTPPH VTPPL APSL APSH ANSL ANSH APSLOF ANSLOF ACDH ACDL FMIRB FMIRP FMIRA VMIRL VMIRH
Block
Min -1.5 1 1 1 1 1 1 10.5
Typ 0.5 1.7 1.3 1.45 1.55 1.45 1.45 13.5 1.05 1.05 1.05 1.10 1.20 1.3 13.0 550 75 400 0.1 -
Max 2 2.4 1.6 1.9 2.1 1.9 1.9 16.5 1.1 1.1 1.1 1.5 1.4 1.75 16.0 1.5 1.2 1.2 1.0 2.5 900 600 0.2 -
Unit dB dB dB V V V V V V V V V V HZ Khz HZ V V
Tracking Error Gain & Balance
1.0 1.0 1.0 1.0 1.0 1.0 10.0 3.5 3.8
Automatic Power Control (APC)
3.8 4.0 2.5 30
MIRROR
1.8
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VIDEO-CD 2ND GENERATION
KB9224
No 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93
Item FOK THRESHOLD voltage FOK output voltage H FOK output voltage L FOK freq. charac. DEFECT BOTTOM voltage DEFECT Cutoff voltage DEFECT minimum input voltage DEFECT maximum input voltage NORMAL EFM DUTY voltage 1 NORMAL EFM DUTY symmetry NORMAL EFM DUTY voltage 3 NORMAL EFM DUTY voltage 4 NORMAL EFM minimum input voltage NORMAL EFM DUTY difference 1 NORMAL EFM DUTY difference 1 ENV EFM DUTY voltage 1 ENV EFM DUTY voltage 2 ENV EFM DUTY symmetry ENV EFM DUTY voltage 3 ENV EFM DUTY voltage 4 ENV EFM DUTY voltage 5 ENV EFM DUTY voltage 6 ENV EFM minimum input voltage FZC THRESHOLD voltage ANTI-SHOCK detect H ANTI-SHOCK detect L TZC THRESHOLD voltage SSTOP THRESHOLD voltage
Symbol VFOKT VFOHH VFOKL FFOK FDFCTB FDFCTC VDFCTL VDFCTH NDEFMN NDEFMA NDEFMH NDEFML NDEFMV NDEFM1 NDEFM2 EDEFMN1 EDEFMN2 EDEFMA EDEFMH1 EDEFMH2 EDEFML1 EDEFML2 EDEFMV VFZC VATSCH VATSCL VTZC VSSTOP
Block
Min -420 4.3
Typ -350 45 670 4.7 0.3 0 5 +50 -50 50 50 0 0 5 +50 +250 -50 -250 69 32 -32 0 -65
Max -300 0.7 50 1000 0.5 +50 10 +100 0 0.12 70 70 +50 +50 10 +100 +340 0 -160 0.12 100 67 -7 +30 -30
Unit mV V V KHZ HZ KHZ V V mV % mV mV V mV mV mV mV % mV mV mV mV V mV mV mV mV mV
FOK
40 2.0
DEFECT
1.8 -50 0 0 -100
Normal EFM Slice
30 30 -50 -50 0
Envelope EFM Slice
0 +160 -100 -340 35 7 -67 -30 -100
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VIDEO-CD 2ND GENERATION
KB9224
No 94 95 96 97 98 99 100 101 102 103
Item TRACKING GAIN WIN T1 TRACKING GAIN WIN T2 TRACKING GAIN WIN I1 TRACKING GAIN WIN I2 TRACKING BAL WIN T1 TRACKING BAL WIN T2 VREG voltage Reference voltage Reference current H Reference current L
Symbol VTGWT1 VTGWT2 VTGWI1 VTGWI2 VTGW11 VTGW12 VREG VREF IREFH IREFL
Block
Min 200 100 250 150 -50 -40 3.20
Typ 250 150 300 200 0 0 3.45 0 0 0
Max 300 200 350 250 +50 +40 3.65 +100 +100 +100
Unit mV mV mV mV mV mV V mV mV mV
Reference Voltage
-100 -100 -100
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VIDEO-CD 2ND GENERATION
KB9224
No 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136
Item F.SERVO OFF OFFSET F.SERVO DAC ON OFFSET F.SERVO AUTO OFFSET F.SERVO AUTO ISTAT FERR FEBIAS status F.SERVO loop gain F.SERVO output voltage H F.SERVO output voltage L F.SERVO maximum output voltage H F.SERVO maximum output voltage L F.SERVO osillation voltage F.SERVO FEED through F.SERVO search voltage H F.SERVO voltage L FOCUS full gain F.SERVO AC gain 1 F.SERVO AC phase 1 F.SERVO AC gain 2 F.SERVO AC phase 2 F.SERVO mutting F.SERVO AC charac. 1 F.SERVO AC charac. 2 F.SERVO AC charac. 3 F.SERVO AC charac. 4 F.SERVO AC charac. 5 F.SERVO AC charac. 6 T.SERVO DC gain T.SERVO OFF offset T.SERVO DAC offset T.SERVO ON offset T.SERVO AUTO offset T.SERVO oscillation T.SERVO ATSC gain
Symbol VOSF1 VOSF2 VAOF VISTAT2 VFEBIAS GF VFOH VFOL VFOMH VFOML VFOSC GFF VFSH VFSL GFSFG GFA1 PFA1 GFA2 PFA2 GMUTT GFAC1 GFAC2 GFAC3 GFAC4 GFAC5 GFAC6 GTO VOST1 VTDAC VOST2 VTAOF VTOSC GATSC
Block Focus Servo
Min -100 0 -65 4.3 -50 19 4.4 3.68 0 +0.35 -0.65 40.5 19.0 30 14.0 30 0.75 0.68 0.60 0.68 0.94 0.73 13.5 -100 150 -250 -50 0 17.5
Typ 0 +250 0 0 21.5 +100 +0.50 -0.50 42.5 23.0 65 18.5 65 0.85 0.78 0.70 0.78 1.04 0.83 15.0 0 320 0 0 +100 20.5
Max +100 +550 +65 +50 24 0.75 1.32 +185 -35 +0.65 -0.35 45.0 27.0 90 23.0 90 -15 0.95 0.88 0.80 0.88 1.14 0.93 17.75 +100 550 +250 +50 +185 23.5
Unit mV mV mV V mV dB V V V V mV dB V V dB dB deg dB deg dB dB mV mV mV mV mV dB
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VIDEO-CD 2ND GENERATION
KB9224
No 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169
Item T.SERVO LOCK gain T.SERVO gain up T.SERVO output voltage H T.SERVO output voltage L T.SERVO maximum output voltage H T.SERVO minimum output voltage L T.SERVO JUMP H T.SERVO JUMP L T.SERVO DIRC H T.SERVO DIRC L T.SERVO output voltage L T.SERVO AC gain 1 T.SERVO AC phase 1 T.SERVO AC gain 2 T.SERVO AC phase 2 T.SERVO full gain T.SERVO AC charac. 1 T.SERVO AC charac. 2 T.SERVO AC charac. 3 T.SERVO AC charac. 4 T.SERVO AC charac. 5 T.SERVO AC charac. 6 T.SERVO LOOP MUTT T.SERVO LOOP MUTT AC T.SERVO INT MUTT M1 T.SERVO INT MUTT M2 T.SERVO INT MUTT M4 SL.SERVO DC gain SL.SERVO FEED through SL.SERVO lock SLED forward kick SLED reverse kick SLED output voltage H
Symbol GLOCK GTUP VTSH VTSL VTSMH VTSML VTJH VTJL VDIRCH VDIRCL GTFF GTA1 PTA1 GTA2 PTA2 GTFG GTAC1 GTAC2 GTAC3 GTAC4 GTAC5 GTAC6 TSMUTT TSMTAC TSMTM1 TSMTM2 TSMTM4 GSL GSLF SLOCK VSKH VSKL VSLH
Block
Min 17.5 17.5 4.48 3.68 0.35 -0.65 0.35 -0.65 9.0 -140 17.5 -195 29.5 0.59 0.75 0.65 1.30 1.15 1.01 -250 0 0 0 0 20.5 0 0.45 -0.75 4.48
Typ 20.5 20.5 0.5 -0.5 0.5 -0.5 12.5 -115 21.5 -150 32 0.69 0.85 0.75 1.35 1.25 1.11 0 +50 +50 +50 +50 22.5 +50 0.60 -0.60 -
Max 23.5 23.5 0.52 1.32 0.65 -0.35 0.65 -0.35 -39 16.0 -90 25.5 -100 34.75 0.90 0.95 0.85 1.50 1.35 1.21 +250 +100 +100 +100 +100 24.5 -34 +100 0.75 -0.45 -
Unit dB dB V V V V V V V V dB dB deg dB deg dB mV mV mV mV mV dB dB mV V V V
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VIDEO-CD 2ND GENERATION
KB9224
No 170 171 172 173 174 175 176 177 178 179 180 181 182 183
Item SLED output voltage L SLED maximum output voltage H SLED minimum output voltage L SP.SERVO 1X gain SP.SERVO 2X gain SP.SERVO output voltage H SP.SERVO output voltage H SP.SERVO maximum output voltage H SP.SERVO minimum output voltage L SP.SERVO AC gain 1 SP.SERVO AC phase 1 SP.SERVO SMEF gain SP.SERVO AC gain 2 SP.SERVO AC phase 2
Symbol VSLL VSLMH VSLML GSP GSP2 VSPH VSPL VSPMH VSPML GSPA1 PSPA1 GSMEF GSPA2 PSPA2
Block
Min 3.68 14.0 19.0 4.48 3.68 -7.0 -120 13.0 5.5 -120
Typ 16.5 23.0 -3.5 -90 16.5 9.0 -90
Max 0.52 1.32 19.0 27.0 0.52 1.32 0 -60 20.0 12.5 -60
Unit V V V dB dB V V V V dB deg dB dB deg
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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.
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VIDEO-CD 2ND GENERATION
KB9224
$47 Latch
MLT
FOK
Blind Time, E
FZC
Focus Servo On
Focus Output
Seach Down
Serach Up
ISTAT Internal Status
$02
$03
$03
$03
$08
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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 using the WDCK Standard clock for Blind "A" time, set by register 5. (1 WDCK = 0.011 mS) Repeat checks if TRCNT is continuously "H" at rising edge of WDCK, during Blind time "B" set by Register 5.
Wait Blind "A"
TRCNT =
Yes
?
No
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.
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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 Blind "A"
Wait using the WDCK Standard clock for Blind "A" time, set by register 5. (1 WDCK = 0.011 mS)
TRCNT = 5
?
No
Yes
Track REV Jump, Sled FWD Kick
$4A: Tracking REV Jump & Sled FWD Kick $4B: Tracking FWD Jump & Sled REV Kick 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.
C = Overflow?
Yes
No
Track, Sled Servo On
End
10 Track Jump Timing Chart {$4A(FWD), $4B(REV), inside () is Reverse}
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VIDEO-CD 2ND GENERATION
KB9224
$4A ($4B)
MLT
FWD REV Blind Time, A Trcnt 5 count Overflow time C, Check Trcnt 1 period
TRCNT
Track Output Sled Output
Tracking Forward Jump Track Servo On Reverse Jump Track Servo On
Sled Servo On
Sled Forward Kck
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.
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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 Blind "A"
Wait using the WDCK Standard clock for Blind "A" time, set by register 5. (1 WDCK = 0.011 mS)
TRCNT = N ?
No
Yes
Track REV Jump, Sled FWD Kick
$4C: Tracking REV Jump & Sled FWD Kick $4D: Tracking FWD Jump & Sled REV Kick 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. $4C: Sled FWD Kick $4D: Sled REV Kick is continuously executed for KICK "D" time
C = Overflow?
Yes
No
Wait Kick "D"
Track Servo On Sled FWD Kick
Track, Sled Servo On
End
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VIDEO-CD 2ND GENERATION
KB9224
2N Track Jump Timing Chart {$4C(FWD), $4D(REV), inside () is Reverse}
$4A ($4D)
MLT
FWD REV Blind Time, A Trcnt N count Overflow time C, C Check Trcnt 1 period
TRCNT
Track Output Sled Output
Tracking Forward Jump Track Servo On Reverse Jump Track Servo On
Sled Servo On
Sled Forward Kck D
Sled Servo On During D time, Sled FWD Kick Q data Read possible
ISTAT Internal Status
$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.
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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 Blind "A"
Wait using the WDCK Standard clock for Blind "A" time, set by register 5. (1 WDCK = 0.011 mS)
TRCNT = M ?
Yes
No
Count M of Trcnt set by Register 7
Track & Sled Servo On
End
M Track Jump Timing Chart {$4E(FWD), $4F(REV), inside () is Reverse}
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VIDEO-CD 2ND GENERATION
KB9224
$4E ($4F)
MLT
FWD REV Blind Time, A Trcnt M count
TRCNT
Track Output Sled Output
Track Servo On
Tracking Servo Off
Track Servo On
Sled 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.
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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 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
TRCNT = T ?
Yes
No
Track Servo On Sled REV Kick Wait (REV Kick "R")
Track, Sled Servo On
End
29
VIDEO-CD 2ND GENERATION
KB9224
$44 ($45)
MLT
FWD REV Blind Time, F Blind K Trcnt P count Trcnt T count Kick, R
TRCNT
Track Output Sled Output
Tracking Forward Jump Track Servo On Track Servo On
Sled Servo On
Sled Forward Kck PWM Count
REV Kick
Sled Servo On
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.
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VIDEO-CD 2ND GENERATION
KB9224
AUTOMATIC ADJUST COMMAND
Tracking Balance, Gain Adjust ADDRESS D11 Tracking Balance $80XX~$81XX Initial Value Tracking Gain $81X~$83X Initial Value Tracking Balance, Gain Adjust Window Data Address $84X D3 Tracking Gain Adjust Window TRCNT:ISTAT 0-250MV:200MV 1-150MV:300MV 0 D2 Tracking Balance Adjust Window 0:-10MV~15MV 1:-20MV~20MV 0 D1 Focus. Servo Offset Adjust 0:OFF, 1:ON D0 Fe.bias Offset Adjust 0:OFF,1:ON ISTAT $841 (F.ERR) $842 (F.SER) TRCNT TRCNT 0 0 0 0 ADDRESS D10 0 D9 0 D8 B5 0 D4 G4 1 D7 B4 1 D3 G3 0 DATA D6 B3 1 D2 G2 0 D5 B2 1 D1 G1 0 D4 B1 1 D0 G0 0 D3 B0 1 BAL TRCNT ISTAT TRCNT
TGH
TGL
Initial Value
0
0
APC (Automatic Power Control) Data Address $85XX D7 LDON APC ON/OFF 0: APC ON 1: APC OFF 1 D3 FlagSel 0:Hard Control 1:Micom Data Initial Value 0 D6 PNSEL APC P/N SEL 0:PSUB 1:NSUB 0 D2 FlagCon 0:L falg-SW On 1:H flag-SW Off 1 D5 INTC2 0 0 1 1 0 D1 FlagInv 0:FlagB-SW On 1:Flag-SW Off 1 D4 INTC 0 1 0 1 TRACKING S. WINDOW MUTT 11 kHZ ~ 0.7 kHZ Cpeak Mutting 2.75 kHz ~ 0.7 kHz 5.5 kHz ~ 0.7 kHz 0 D0 Clock 0:Lock=1 1:Lock=0,1 by DSP 1 ISTAT TRCNT
Initial Value Address $85XX
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VIDEO-CD 2ND GENERATION
KB9224
Register Set 1 Data Address $86XX D7 Focus Servo Offset Value Reset 0:Reset 1:Set D6 Trcnt Output Type Select (Monitor=1) 0:Fok 1:Trcnt 1 D5 Trcnt, Monitor Select 1:Fok,TGL TRCNT 0:TEST D4 Febias Focus S. Offset Clock 0:46ms 1:5.8ms D3 Flag Hold Time 92.8ms D2 Flag Hold Time 46.4ms D1 Flag Hold Time 23.2ms D0 Flag Hold Time 11.6ms
INITIAL. Value 1
1
1
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 D6 DIRCI Febias Offset Value 0:Reset 1:Set D5 AGCL1 D4 AGCL2 D3 ATSCF 0 AGC Level Setting 0 0 1.6V 0 1 1.45V 1 0 1.25V 1 1 1.0V Envelope EFM Slice mode controled by Lock 0:Off 1:ON 0 0 0 1 1 1 1 Initial Value 1 1 1 1 0 1 D2 MT0 0 0 1 1 0 0 1 1 1 D1 MT1 0 1 0 1 0 1 0 1 1 D0 MT2 - Cpeak Fscmpo BALH Flag Dfcint Fecmpo BALL LOCKG
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VIDEO-CD 2ND GENERATION
KB9224
Register Set 3 Data Address $8EXX D7 EC8 D6 EC7 D5 EC6 Track Servo Phase Shift 0:Off 1:On D4 EC5 Track Servo Gain Shift 0:Off 1:On D3 EC4 D2 EC3 D1 EC2 Focus Servo Gain Shift 0:Off 1:On D0 EC1 Focus Servo Phase Shift 0:Off 1:On -
Tracking Servo Center Peak Freq. 0 1 0 1 0 0 1 1 1.2K 1.3K 1.4K 1.5K
Focus Servo Center Peak Freq. 0 1 0 1 0 0 1 1 1.2K 1.3K 1.4K 1.5K
Initial Value Register Set
0
0
0
0
0
0
0
0
4
Data
Address $8FXX
D7 TEST FOK Defect Mirror Output On/Off 0: On 1: Off
D6 EC10 EFM ASY Gain 0: 1X 1: 2X
D5 EC9 Envelope EFM Slice Gain 0: 2X 1: 1.5X
D4 TOA4
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
Initial Value
0
0
0
1
0
0
0
0
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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 69 F beam E 70 E beam I/V Amp I/V Amp
RHI Vd c
+ + -
RHO AND Logic RLO TBAL 30 ISTAT To MICOM
RLI
Gain Adjust 6 bit Array
MIRROR TZC
D
Q
29
TRCNT
6 bit (B5~B0) from MICOM LPF
CK
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 RHO RLO TBAL (AND gate) RHI: High level threshold value H L L RLI < Vdc < RHI H H H RLI < RHI < Vdc L H L
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.
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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
Other method 1. Can balance afjust while in track mode. 2. Trcnt freq. check is easy in $F3 apply 2X mode.
Balance window level select
-10 ~ +15 mV :$84 X0XX -20 ~ +20 mV :$84 X1XX Most select is + 20 mV.
No
B0 to B5 Switch control. 1 step increase from $8040 to $81AF
TRCNT = 10 ? during 10 ms
3 times repeat. If failure again after 3 tries, switch cahnge.
Yes
No
ISTAT = H ?
Yes
After 10 ms Wait, 3 times repeat check to see if 10 ms ISTAT = "H". If failure again after 3 tries, switch cahnge. 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.
After current adjust value +2 step, Adjust complete
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
Other method 1. Can balance afjust while in track mode. 2. Trcnt freq. check is easy in $F3 apply 2X mode.
Balance window level select B0 to B5 Switch control. 1 step increase from $8000 to $81FF
-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.
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VIDEO-CD 2ND GENERATION
KB9224
Tracking Balance Equivalant Resistor
Fixed R and TRACKING BALANCE TE1 offset F Resi Equa. 391K 391K 391K 391K 391K 391K 391K 391K 391K 391K 391K 391K 391K 391K 391K 391K 391K 391K 391K 391K 391K 391K 391K 391K 391K 391K 391K 391K 391K 391K 391K 391K E Resi. Equa. 531K 523.6K 515K 507.5K 500.5K 492.5K 484.8K 477.1K 467.5K 459.7K 451K 444.8K 437K 429.4K 422K 413.5K 398.4K 391.6K 383.8K 376K 368.6K 360.8K 353K 345K 336K 327.9K 320K 312K 305K 297K 289K 282K Parallel R value(440K->0) DATA $800 $801 $802 $803 $804 $805 $806 $807 $808 $809 $80A $80B $80C $80D $80E $80F $810 $811 $812 $813 $814 $815 $816 $817 $818 $819 $81A $81B $81C $81D $81E $81F 75K// 6bit R 6.29K 6.47K 6.68K 6.89K 7.09K 7.33K 7.58K 7.85K 8.21K 8.52K 8.88K 9.21K 9.62K 10.0K 10.5K 11.0K 12.2K 12.9K 13.7K 14.6K 15.6K 16.8K 18.2K 19.8K 22.3K 24.8K 27.9K 32.1K 37K 44.6K 55.9K 75K 6bit i 6.87K 7.09K 7.33K 7.58K 7.84K 8.12K 8.44K 8.77K 9.22K 9.62K 10.1K 10.5K 11.0K 11.6K 12.2K 13K 14.6K 15.6K 16.8K 18.2K 19.7K 21.6K 24K 27K 31.7K 37.1K 44.6K 56K 73.3K 110K 220K 0K 13K 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 27K 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 56K 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 110 K 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 220 K 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 440 K 0,1 0,1 0,1 0,1 0,1 0,1 0,1 0,1 0,1 0,1 0,1 0,1 0,1 0,1 0,1 0,1 0,1 0,1 0,1 0,1 0,1 0,1 0,1 0,1 0,1 0,1 0,1 0,1 0,1 0,1 0,1 0,1 1) 220K//110K=73.33K 2) 56K//27K=18.21K 3) 27K//13K=8.775K 4) 110K//56K=37.10K 5) (1)//(2)=14.58K 6) (3)//(4)=7.09K 7) 56K//13K=10.55K 8) (1)//(7)=9.223K 9) 56K//220K=44.63K A)56//110/220=31.74K B)13//56//110=9.62K C)(1)//27K=19.73K D)27K//110K=21.67K E)27K//220K=24.04K E Equav. R
252K 6.8K
6Bit Resister matrix
NOTE
252K 13K
F Equav. R
26 K
6bit1/4
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VIDEO-CD 2ND GENERATION
KB9224
GAIN ADJUSTMENT
F 69 F beam E 70 E beam I/V Amp Controlled by 5 bit switch (B4~B0) from MICOM I/V Amp
GH I
Resistance Array
Vd c
+ + -
TGH AND Logic TGL TGO 30 ISTAT To MICOM
GLI
29
TRCNT
TE1
LPFT
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 TGH TGL H L GLI < Vac < GHI H H GLI < GHI < Vac L 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
If Gain adjusting after Balance adjustment, separate environment settings are not needed.
Gain window level select
-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.
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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
If Gain adjusting after Balance adjustment, separate environment settings are not needed.
Gain window level select
-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
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VIDEO-CD 2ND GENERATION
KB9224
Tracking Gain Equivalant Resistance
Tracking Gain Data $83F $83E $83D $83C $83B $83A $839 $838 $837 $836 $835 $834 $833 $832 $831 $830 $82F $82E $82D $82C $82B $82A $829 $828 $827 $826 $825 $824 $823 $822 $821 $820 TERR Tot. Gain 0.108 0.303 0.419 0.575 0.699 0.798 0.876 0.981 1.048 1.139 1.195 1.273 1.321 1.389 1.431 1.490 1.52 1.618 1.676 1.755 1.800 1.8675 1.907 1.961 1.994 2.040 2.069 2.108 2.133 2.167 2.188 2.219 96K / 32K -> 3.0 Times 0.506 0.539 0.558 0.585 0.600 0.622 0.635 0.653 0.664 0.680 0.689 0.702 0.711 0.722 0.729 0.739 5.23K 5.23K 5.23K 5.23K 5.23K 5.23K 5.23K 5.23K 5.23K 5.23K 5.23K 5.23K 5.23K 5.23K 5.23K 5.23K 5.375K 6.125K 6.625K 7.375K 7.875K 8.625K 9.125K 9.875K 10.375K 11.125K 11.625K 12.375K 12.875K 13.625K 14.125K 14.875K 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 TERR Gain 5bit Gain Compared Combination Ratio 0.036 0.101 0.139 1.191 0.233 0.266 0.292 0.327 0.349 0.379 0.398 0.424 0.440 0.463 0.477 0.496 Value 10.0K 10.0K 10.0K 10.0K 10.0K 10.0K 10.0K 10.0K 10.0K 10.0K 10.0K 10.0K 10.0K 10.0K 10.0K 10.0K Value 0.375K 1.125K 1.625K 2.375K 2.875K 3.625K 4.125K 4.875K 5.375K 6.125K 6.625K 7.375K 7.875K 8.625K 9.125K 9.875K 5.0K 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 5.0K 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 2.5K 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1.25K 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 0.75K 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 The GAIN ratio is calculated in the TE1 pin. Note
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KB9224
FEBIAS OFFSET ADJUST
164 K 32 K
vb va
32 K
59
FE1
+
160 K
sev_stop FEbias 63
4K X1 X2 X4 X8 X16 3K
+
+
vc
fcmpo
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.
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Example of System Control Program
DISC CHANGE
POWER ON
DISC TRAY CHECK OPEN REPLAY LOADING
CLOSE
TIME 100ms maxious Focus error febias Auto Adjust Start $878+$87F+$841 Transmit After 100ms ISTAT L->H ?
100ms maxious
Focus offset cancel Auto Adjust Start $08+$867+(200ms wait)+ $86F+$842 Transmit
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 FOCUSING Auto-Focusing $47 Transmit NO FOCUS OK ? FOK H? YES Spindle Servo Loop On Tracking&Sled loop Off $20 Transmit NO TRY COUNT 3? YES LASER OFF $85C Transmit
2s maxious
300ms maxious
Tracking Balance Adjust
DISPLAY ( NO DISC )
Tracking Gain Adjust
STANDBY
TOC READ Complete ? PASS DISC 8/12Cm Check
FAI L
LASER OFF $85C Transmit
DISPLAY ( ERROR ), TRAY OPEN
STANDBY PLAY BACK
FEbias Offset Setting
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* Application when adjusting offset from 0 mV ~ +100 mV
VDD (5 V)
* Application when adjusting offset from -100 mV ~ 0 mV
FEBIAS
Rx
FEBIAS
4K
Optional Offset Voltage (Voff)
Rx
Rx
VDD/2
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.
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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 76
300 pF
250 pF
58 K
58 K
RF78
1K
PDA 65
58 K
PDC 66 VC
+
58 K
2K
RFL 77 RFO 79
2 pF 2 pF 3.9 K
0.39 K
+
2K
58 K
PDB 67
58 K
PDD 68 VC
+
vc
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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 Vn
Full Wave Rectifier (RF peak envelope)
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
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VIDEO-CD 2ND GENERATION
KB9224
programmed so that the balance is adjusted in E block, and gain is automatically adjusted in Te1.
TE1 54
TE2 53
LPFT 55
F
69
I/V Amp
WIN COMP
+
E 70 I/V Amp
B_REF_CNTR
29
TRCNT
WIN COMP
16R 8R 4R 2R R G_REF_CNTR
BAL [4:0] GAIN [4:0]
Gain Up/down
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 RFI
79
40 K
+
57 K
40
90 K
80
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
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VIDEO-CD 2ND GENERATION
KB9224
within Disc tracks, H between tracks, and H when a defect above 1.4 ms is detected.
38 K 17 K
80 k
+
17 K
1.5 K
8
MCP
IRF
80
+
19 K
Peak and Bottom Hold
+
96 K
+
39
MIRROR
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 ENC 16
ENVR
15
RF envelope detect and asymmetry / envelope DC compensation and slice AC level summing system Compensation Asy. DC
X5
33
ASY
32
EFM2 EFM
RFI
3
+
40 K
31
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
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VIDEO-CD 2ND GENERATION
KB9224
to either direction to generate the Defect detect signal.
DCC1
75 K 37.5 K
12
11
DCC2
RFO
79
28 K
+
75 K
Bottom Envelope Hold
VC+0.6254 V
43 K
+
24 DEFECT
VC
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
150 K
PN
PD
71
+ 150 K 150 K
+ 300 K
0.75 K
72
5.5 K
13.7 Center Voltage Generation Circuit This circuit makes the Center Voltage using the Resistance Divide.
30 K
+
30 K
73 VC
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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 EQI
VCA
Equalize
4 ARF
13.9 ATSC The Detect Circuit for the Tracking Gain Up (about Shock) is composed of a Window and a Comparator.
+ -
51 ATSC
BPF 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.
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VIDEO-CD 2ND GENERATION
KB9224
FSET
3.6 K
13 VC
3.6 K
+
20 K
+
48
To Digital FEO
FZCI
+
48 K
FE2
58
Focus Phase Compensation
160 K
82 K
FDFCT 60
DFCT1
FS4B
40 K
+
FS2B 47 FE-
FGD
27
470 K 40 K 46 K 10 K 50 K 5K
FS3
26
580 K
FS3
+
FS1
25 FLB
10 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.
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VIDEO-CD 2ND GENERATION
KB9224
TE2
53
470 K
TM4 49
680K 680K
TE-
TDFCT 57 DFCT1 TG1 TG1B
10 K 68 pF
TM3
TM1
110 K 20 K
TGU
61
82 K
Tracking Phase Compensation
10 K
90 K
TM7
+
50
TEO
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 TM6 TM7 SLO
+
TM2
44 42
SLSL+
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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 22 K 220 K 15 K 220 K 50 K
SMON
22
SMDP
21
20 K 15 K 220 K
+
100 K 220 K
+ -
46
SPDLO
45 FVCO Double Speed
SPDL-
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 Interruption On (Mirror 11 kHz~0.7 kHz) Interruption Off Interruption On (Mirror 2.75 kHz~0.7 kHz) Interruption On (Mirror 5.5 kHz~0.7 kHz) 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. APC On $854X $855X $856X $857X APC Off $85CX $85DX $85EX $85FX
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VIDEO-CD 2ND GENERATION
KB9224
MIRROR TZC edge detect by inverter elay TZC rising, falling detect
D
Q TZC Output Mirror value is output at TZC rising, falling detect
TZC
CK
55

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