Zenith HDR230, Руководство по обслуживанию

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3-1
SECTION 3
ELECTRICAL
CONTENTS
1. WIRING DIAGRAM.............................................3-2
2. SYSTEM S/W UP-DATE & DIAGNOSTIC S/W..3-3
3. ELECTRICAL TROUBLESHOOTING
GUIDE .................................................................3-7
1) INITIAL...........................................................3-7
2) POWER(SMPS) PART ..................................3-8
3) SYSTEM PART............................................3-10
4) VIDEO PART................................................3-11
5) AUDIO PART ...............................................3-14
6) VSB PART ...................................................3-15
7) PVR PART ...................................................3-16
4. WAVEFORMS ...................................................3-17
1) DIGITAL SYSTEM [CLOCK GENERATOR]
PART............................................................3-17
2) DIGITAL SYSTEM [SYSTEM MEMORY]
PART............................................................3-19
3) VIDEO [PLL] PART .....................................3-21
4) VIDEO [OUTPUT CONNECTOR] PART.....3-23
5) AUDIO PART ...............................................3-25
6) PVR [CLOCK] PART ...................................3-27
7) VSB [VSB DECODER] PART .....................3-29
8) VSB [DOWN CONVERTER] PART.............3-31
9) MICOM [DOWN CONVERTER] PART........3-33
5. VOLTAGE MEASURED VALUE .......................3-35
1) CAPACITOR ................................................3-35
2) DIODE..........................................................3-38
3) TRANSISTOR ..............................................3-39
6. BLOCK DIAGRAMS .........................................3-40
1) OVERALL BLOCK DIAGRAM ....................3-40
2) POWER BLOCK DIAGRAM .......................3-42
3) SYSTEM BLOCK DIAGRAM ......................3-44
4) VIDEO BLOCK DIAGRAM..........................3-46
5) VIDEO PLL BLOCK DIAGRAM ..................3-48
6) AUDIO BLOCK DIAGRAM..........................3-50
7) TUNER/VSB & MICOM
BLOCK DIAGRAM ......................................3-52
8) PVR BLOCK DIAGRAM..............................3-54
7. CIRCUIT DIAGRAMS .......................................3-56
1) POWER CIRCUIT DIAGRAM......................3-56
2) SYSTEM CIRCUIT DIAGRAM 1 .................3-58
3) SYSTEM CIRCUIT DIAGRAM 2 .................3-60
4) SYSTEM CIRCUIT DIAGRAM 3 .................3-65
5) VIDEO CIRCUIT DIAGRAM 1 .....................3-67
6) VIDEO CIRCUIT DIAGRAM 2 .....................3-69
7) AUDIO CIRCUIT DIAGRAM........................3-68
8) PVR CIRCUIT DIAGRAM 1.........................3-70
9) PVR CIRCUIT DIAGRAM 2.........................3-72
10) VSB CIRCUIT DIAGRAM..........................3-74
11) AUDIO/VIDEO OUTPUT
CIRCUIT DIAGRAM ..................................3-76
12) POWER, IF, µ-COM, VIDEO
CIRCUIT DIAGRAM ..................................3-78
13) FRONT CIRCUIT DIAGRAM.....................3-80
8. PRINTED CIRCUIT DIAGRAMS ......................3-82
1) DIGITAL MAIN PRINTED
CIRCUIT DIAGRAMS(TOP) ........................3-82
2) DIGITAL MAIN PRINTED
CIRCUIT DIAGRAMS(BOTTOM) ................3-84
3) KEY(LEFT) PRINTED
CIRCUIT DIAGRAM ....................................3-86
4) KEY(RIGHT) PRINTED
CIRCUIT DIAGRAM ....................................3-86
5) POWER PRINTED CIRCUIT DIAGRAM.....3-88
9. REFERENCE ....................................................3-90
1) RESET BLOCK DIAGRAM .........................3-90
2) POWER BLOCK DIAGRAM .......................3-91