Zenith XBV323 Series, Руководство по обслуживанию

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3-1
SECTION 3
ELECTRICAL
CONTENTS
OVERALL WIRING DIAGRAM
..............................3-2
VCR PART
ELECTRICAL ADJUSTMENT
PROCEDURES
............................................................3-3
VCR ELECTRICAL TROUBLESHOOTING
GUIDE
.............................................................................3-4
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 .......................................................3-13
7. Tuner/IF CIRCUIT .................................................3-18
BLOCK DIAGRAMS
................................................3-20
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
..............................................3-32
1. Power (SMPS) CIRCUIT DIAGRAM ....................3-32
2. TU/IF CIRCUIT DIAGRAM ....................................3-34
3. A/V CIRCUIT DIAGRAM .......................................3-36
4. Hi-Fi CIRCUIT DIAGRAM .....................................3-38
5. JACK CIRCUIT DIAGRAM ...................................3-40
6. SYSTEM CIRCUIT DIAGRAM ..............................3-42
7. TIMER CIRCUIT DIAGRAM..................................3-44
• WAVEFORMS .........................................................3-46
• CIRCUIT VOLTAGE CHART ..................................3-48
PRINTED CIRCUIT DIAGRAMS
.........................3-50
1. VCR P.C.BOARD ..................................................3-50
2. KEY 1(LEFT) P.C.BOARD ....................................3-52
3. KEY 2(RIGHT) P.C.BOARD ..................................3-52
4. POWER P.C.BOARD ............................................3-54
DVD SECTION
ELECTRICAL TROUBLESHOOTING
GUIDE & WAVEFORMS
........................................3-56
1. SYSTEM OPERATION FLOW ..............................3-56
2. TEST & DEBUG FLOW ........................................3-57
DETAILS AND WAVEFORMS ON
SYSTEM TEST AND DEBUGGING
...................3-63
1. SYSTEM 27MHZ CLOCK,
RESET, FLASH R/W SIGNAL ..............................3-63
2. SDRAM CLOCK....................................................3-63
3. TRAY OPEN/CLOSE SIGNAL ..............................3-64
4. SLED CONTROL RELATED SIGNAL
(NO DISC CONDITION) ........................................3-67
5. LENS CONTROL RELATED SIGNAL
(NO DISC CONDITION) ........................................3-67
6. LASER POWER CONTROL RELATED
SIGNAL(NO DISC CONDITION)...........................3-68
7. DISC TYPE JUDGEMENT WAVEFORMS............3-68
8. FOCUS ON WAVEFORMS ...................................3-70
9. SPINDLE CONTROL WAVEFORMS
(NO DISC CONDITION) ........................................3-71
10. TRACKING CONTROL RELATED
SIGNAL(SYSTEM CHECKING)..........................3-72
11. RF WAVEFORM ..................................................3-73
12. MT1379 AUDIO OPTICAL AND COAXIAL
OUTPUT (ASPDIF) .............................................3-73
13. MT1379 VIDEO OUTPUT WAVEFORMS ...........3-74
14. AUDIO OUTPUT FROM AUDIO DAC ................3-75
BLOCK DIAGRAMS
................................................3-77
1. OVERALL BLOCK DIAGRAM..............................3-77
2. SERVO BLOCK DIAGRAM ..................................3-78
3. MPEG & MEMORY BLOCK DIAGRAM ...............3-79
4. VIDEO & AUDIO BLOCK DIAGRAM ...................3-80
CIRCUIT DIAGRAMS
..........................................3-81
1. SYSTEM CIRCUIT DIAGRAM ..............................3-81
2. RF & DSP SERVO CIRCUIT DIAGRAM ..............3-83
3. AUDIO CIRCUIT DIAGRAM .................................3-85
4. AV/JACK CIRCUIT DIAGRAM..............................3-87
• CIRCUIT VOLTAGE CHART ..................................3-89
PRINTED CIRCUIT DIAGRAMS
.........................3-93
1. MTR P.C.BOARD ..................................................3-93