Zenith XBS448 Service Manual Page 17
- Page / 124
- Table of contents
- BOOKMARKS
- CONTENTS 1
- SECTION 1 2
- A.C. Voltmeter 3
- SERVICING PRECAUTIONS 4
- SECTION 2 5
- CABINET & MAIN CHASSIS 5
- 5. Packing Accessory Section 10
- SECTION 3 11
- ELECTRICAL 11
- OVERALL WIRING DIAGRAM 12
- VCR PART 13
- 1. Power(SMPS) CIRCUIT 14
- 2. SYSTEM/KEY CIRCUIT 16
- (1) AUTO STOP 16
- Caution : 16
- 3. SERVO CIRCUIT 17
- (1) Unstable Video in PB MODE 17
- (2) When the Drum Motor 17
- (2) doesn’t run 17
- 2. SERVO CIRCUIT 18
- 5. Y/C CIRCUIT 20
- (1) No Video in EE Mode 20
- 3. Y/C CIRCUIT 21
- 6. Tuner/IF CIRCUIT 24
- (2) No Sound 25
- 7. Hi-Fi Circuit 26
- BLOCK DIAGRAMS 29
- 3. Y/C BLOCK DIAGRAM 31
- 4. NORMAL AUDIO BLOCK DIAGRAM 32
- 5. Hi-Fi BLOCK DIAGRAM 33
- LA72670M 33
- 6. SYSTEM BLOCK DIAGRAM 34
- CIRCUIT DIAGRAMS 35
- 3-32 3-33 36
- 3-34 3-35 37
- 4. A/V CIRCUIT DIAGRAM 38
- 5. Hi-Fi CIRCUIT DIAGRAM 39
- 6. SYSTEM CIRCUIT DIAGRAM 40
- 7. KEY CIRCUIT DIAGRAM 41
- • WAVEFORMS 42
- • CIRCUIT VOLTAGE CHART 43
- PRINTED CIRCUIT DIAGRAMS 44
- LOCATION GUIDE 44
- NOTES) Warning 45
- 3. KEY 1(LEFT) P.C.BOARD 46
- 4. KEY 2(RIGHT) P.C.BOARD 46
- DVD & AMP PART 47
- 2. Test & debug flow 48
- Check the laser power circuit 51
- ACKL, ASDAT3) 53
- 2. SDRAM CLOCK 57
- 3. TRAY OPEN/CLOSE SIGNAL 57
- 1) Tray open/close waveform 57
- 2) Tray close waveform 58
- 3) Tray open waveform 58
- 8. FOCUS ON WAVEFORMS 62
- 11. RF WAVEFORM 65
- 1) Full colorbar signal(CVBS) 65
- (IC507 PIN 26) 66
- FIG 12-3 66
- (IC507 PIN 21) 66
- FIG 12-2 66
- 1) Audio L/R 67
- 2) Audio related Signal 67
- 1. Overall Block Diagram 69
- 2. SERVO Block Diagram 70
- IIC501 (MPEG + DSP ) 71
- MT1379EEC 71
- INTERFACE 72
- LH-C444M 73
- 3-83 3-84 76
- LC875747B 77
- 3-85 3-86 77
- 3-87 3-88 78
- 3-89 3-90 79
- 3-91 3-92 80
- • Top View 86
- • Bottom View 86
- (Figure A-1) 87
- Fig. A-1 87
- Fig. A-2 88
- Gear Rack F/L 89
- Gear Drive 89
- Fig. A-4 91
- Fig. A-5 92
- 17. Opener Lid (Fig. A-5-2) 92
- 19. Arm T/up (Fig. A-5-4) 92
- Fig. A-9 96
- 34. Base Tension (Fig. A-9-1) 96
- DECK MECHANISM ADJUSTMENT 100
- 2. Essential Check and Repair 105
- 3. Regular Check and Repair 105
- 4. Tools for Check and Repair 105
- 5. Maintenance Process 105
- Cam Part 106
- (KG-684G , GREEN) 106
- EXPLODED VIEWS 113
- DECK MECHANISM PARTS LOCATION 118
- DECK MECHANISM DISASSEMBLY 119
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