Toshiba SD-K530SU Service Manual page 56

OVERALL WIRING DIAGRAM
VCR PART
ELECTRICAL ADJUSTMENT
PROCEDURES
..................................................3-3
ELECTRICAL
TROUBLESHOOTING GUIDE
1. POWER(SMPS) CIRCUIT .............................3-4
2. SYSTEM/KEY CIRCUIT ................................3-7
3. SERVO CIRCUIT ...........................................3-8
4. OSD CIRCUIT..............................................3-10
5. Y/C CIRCUIT ................................................3-11
6. HI-FI CIRCUIT..............................................3-15
7. TUNER/IF CIRCUIT .....................................3-18
BLOCK DIAGRAMS
1. POWER (SMPS) BLOCK DIAGRAM..........3-20
2. TU/IF BLOCK DIAGRAM ............................3-22
3. Y/C BLOCK DIAGRAM ...............................3-24
4. NORMAL AUDIO BLOCK DIAGRAM.........3-26
5. HI-FI BLOCK DIAGRAM .............................3-28
6. SYSTEM BLOCK DIAGRAM ......................3-30
CIRCUIT DIAGRAMS
1. POWER (SMPS) CIRCUIT DIAGRAM1 ......3-32
2. POWER (SMPS) CIRCUIT DIAGRAM 2 .....3-34
3. TU/IF CIRCUIT DIAGRAM ..........................3-36
4. A/V CIRCUIT DIAGRAM .............................3-38
5. HI-FI CIRCUIT DIAGRAM ...........................3-40
6. JACK CIRCUIT DIAGRAM..........................3-42
7. SYSTEM CIRCUIT DIAGRAM.....................3-44
8. TIMER/KEY CIRCUIT DIAGRAM................3-46
• WAVEFORMS................................................3-48
• CIRCUIT VOLTAGE CHART.........................3-50
PRINTED CIRCUIT DIAGRAMS
1. MAIN P.C.BOARD .......................................3-52
2. MAIN P.C.BOARD .......................................3-54
3. POWER P.C.BOARD ...................................3-56
4. KEY P.C.BOARD .........................................3-58
5. TIMER P.C.BOARD .....................................3-58
SECTION 3
ELECTRICAL
CONTENTS
.....................3-2
......................3-4
......................................3-20
....................................3-32
................3-52
DVD PART
ELECTRICAL TROUBLESHOOTING
GUIDE
.................................................................3-60
1. SYSTEM OPERATION FLOW.....................3-60
2. TEST & DEBUG FLOW...............................3-61
DETAILS AND WAVEFORMS ON
SYSTEM TEST AND DEBUGGING
1. SYSTEM 27MHZ CLOCK,
RESET, FLASH R/W SIGNAL.....................3-67
2. SDRAM CLOCK ..........................................3-69
3. TRAY OPEN/CLOSE SIGNAL.....................3-69
4. SLED CONTROL RELATED SIGNAL
(NO DISC CONDITION)...............................3-71
5. LENS CONTROL RELATED SIGNAL
(NO DISC CONDITION)...............................3-71
6. LASER POWER CONTROL RELATED
SIGNAL(NO DISC CONDITION) .................3-72
7. DISC TYPE JUDGEMENT WAVEFORM ....3-72
8. FOCUS ON WAVEFORM ............................3-74
9. SPINDLE CONTROL WAVEFORM
(NO DISC CONDITION)...............................3-75
10. TRACKING CONTROL RELATED
SIGNAL(SYSTEM CHECKING) ................3-76
11. RF WAVEFORM.........................................3-77
12. MT1379 AUDIO OPTICAL AND
COAXIAL OUTPUT (ASPDIF)...................3-77
13. MT1379 VIDEO OUTPUT WAVEFORM ....3-78
14. AUDIO OUTPUT FROM AUDIO DAC.......3-79
BLOCK DIAGRAMS
1. OVERALL BLOCK DIAGRAM ....................3-81
2. SERVO BLOCK DIAGRAM.........................3-82
3. MPEG & MEMORY BLOCK DIAGRAM......3-83
4. VIDEO & AUDIO BLOCK DIAGRAM..........3-84
CIRCUIT DIAGRAMS
1. SYSTEM CIRCUIT DIAGRAM.....................3-85
2. RF & DSP SERVO CIRCUIT DIAGRAM.....3-87
3. AV/JACK CIRCUIT DIAGRAM ....................3-89
• CIRCUIT VOLTAGE CHART.........................3-91
3-1
..........3-67
......................................3-81
....................................3-85