Toshiba SD-33VB - SECTION 3 ELECTRICAL; VCR Part Electrical Adjustment Procedures; VCR Part Electrical Troubleshooting; VCR Part Block Diagrams

3-1
SECTION 3
ELECTRICAL
CONTENTS
OVERALL BLOCK DIAGRAM.............................3-2
VCR PART
ELECTRICAL ADJUSTMENT
PROCEDURES
..........................................................3-3
ELECTRICAL TROUBLESHOOTING
GUIDE
...........................................................................3-4
1. POWER(SMPS) CIRCUIT .......................................3-4
2. SYSTEM/KEY CIRCUIT ..........................................3-7
3. SERVO CIRCUIT.....................................................3-8
4. Y/C CIRCUIT..........................................................3-11
5. Hi-Fi CIRCUIT .......................................................3-15
6. TUNER/IF CIRCUIT...............................................3-18
BLOCK DIAGRAMS..............................................3-20
1. POWER(SMPS) BLOCK DIAGRAM.....................3-20
2. TU/IF, NICAM & A2 BLOCK DIAGRAM...............3-22
3. VPS BLOCK DIAGRAM........................................3-23
4. Y/C BLOCK DIAGRAM.........................................3-24
5. Hi-Fi BLOCK DIAGRAM.......................................3-26
6. SYSTEM BLOCK DIAGRAM................................3-28
CIRCUIT DIAGRAMS............................................3-30
1. POWER(SMPS) CIRCUIT DIAGRAM...................3-30
2. TU/IF, NICAM & A2 CIRCUIT DIAGRAM .............3-32
3. A/V CIRCUIT DIAGRAM .......................................3-34
4. Hi-Fi CIRCUIT DIAGRAM.....................................3-36
5. SCART(JACK) CIRCUIT DIAGRAM ....................3-38
6. SYSTEM CIRCUIT DIAGRAM ..............................3-40
7. TIMER CIRCUIT DIAGRAM..................................3-42
• WAVEFORMS .........................................................3-44
• CIRCUIT VOLTAGE CHART...................................3-46
PRINTED CIRCUIT DIAGRAMS.......................3-50
1. MAIN P.C.BOARD.................................................3-50
2. SMPS P.C.BOARD ...............................................3-52
3. KEY P.C.BOARD ..................................................3-52
4. TIMER P.C.BOARD ..............................................3-52
DVD PART
ELECTRICAL TROUBLESHOOTING
GUIDE & WAVEFORMS
.......................................3-54
1. SYSTEM OPERATION FLOW ..............................3-54
2. TEST & DEBUG FLOW ........................................3-55
DETAILS AND WAVEFORMS ON
SYSTEM TEST AND DEBUGGING
.................3-61
1. SYSTEM 27MHZ CLOCK,
RESET, FLASH R/W SIGNAL...............................3-61
2. SDRAM CLOCK....................................................3-63
3. TRAY OPEN/CLOSE SIGNAL ..............................3-63
4. SLED CONTROL RELATED SIGNAL
(NO DISC CONDITION) ........................................3-65
5. LENS CONTROL RELATED SIGNAL
(NO DISC CONDITION) ........................................3-65
6. LASER POWER CONTROL RELATED
SIGNAL(NO DISC CONDITION)...........................3-66
7. DISC TYPE JUDGEMENT WAVEFORM ..............3-66
8. FOCUS ON WAVEFORM......................................3-68
9. SPINDLE CONTROL WAVEFORM
(NO DISC CONDITION) ........................................3-69
10. TRACKING CONTROL RELATED
SIGNAL(SYSTEM CHECKING)..........................3-70
11. RF WAVEFORM ..................................................3-71
12. MT1379 AUDIO OPTICAL AND COAXIAL
OUTPUT (ASPDIF)..............................................3-71
13. MT1379 VIDEO OUTPUT WAVEFORM..............3-72
14. AUDIO OUTPUT FROM AUDIO DAC.................3-73
BLOCK DIAGRAMS..............................................3-75
1. OVERALL BLOCK DIAGRAM..............................3-75
2. SERVO BLOCK DIAGRAM ..................................3-76
3. MPEG & MEMORY BLOCK DIAGRAM ...............3-77
4. VIDEO & AUDIO BLOCK DIAGRAM ...................3-78
CIRCUIT DIAGRAMS............................................3-79
1. SYSTEM CIRCUIT DIAGRAM ..............................3-79
2. RF & DSP SERVO CIRCUIT DIAGRAM...............3-81
3. AUDIO CIRCUIT DIAGRAM..................................3-83
4. AV/JACK CIRCUIT DIAGRAM..............................3-85
• CIRCUIT VOLTAGE CHART...................................3-87
PRINTED CIRCUIT DIAGRAMS.......................3-91
1. MAIN P.C.BOARD.................................................3-91