Sanyo Projector PLC-XU45 User Manual Page 27
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- TROUBLESHOOTING
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Electrical Adjustments
1. Receive the 16-step grey scale computer signal.
2. Set to COMPUTER mode.
3. Enter the service mode.
4. Connect a digital voltmeter to test point “TP25R1”(+)
and chassis ground (-).
5. Select group no. “3”, item no. “0” and change data
value to adjust the voltage to be 7.30 ±0.05V.
6. Connect a digital voltmeter to test point “TP25G1” (+)
and chassis ground (-).
7. Select group no. “3”, item no. “1” and change data
value to adjust the voltage to be 7.30 ±0.05V.
8. Connect a digital voltmeter to test point “TP25B1”(+)
and chassis ground (-).
9. Select group no. “3”, item no. “2” and change data
value to adjust the voltage to be 7.30 ±0.05V.
1. Receive the 16-step grey scale computer signal.
2. Set to COMPUTER mode.
3. Connect an oscilloscope to test point “TP3551” (+)
and chassis ground (-).
4. Enter the service mode, select group no. “3”, item no.
“7” and change data value to adjust amplitude “a” to
be 5.5 ±0.1V.
(a)
121v Signal Center adjustment
121c NRS adjustment
1. Receive the 16-step grey scale computer signal.
2. Set to COMPUTER mode.
3. Enter the service mode.
4. Connect an oscilloscope to test point “TP25R1” (+)
and chassis ground (-).
5. Select group no. “3”, item no. “3” and change data
value to adjust amplitude “a” to be 10.0 ±0.1V.
6. Connect an oscilloscope to test point “TP25G1” (+)
and chassis ground (-).
7. Select group no. “3”, item no. “4” and change data
value to adjust amplitude “a” to be 10.0 ±0.1V.
8. Connect an oscilloscope to test point “TP25B1” (+)
and chassis ground (-).
9. Select group no. “3”, item no. “5” and change data
value to adjust amplitude “a” to be 10.0 ±0.1V.
(a)
black level
black level
b Black Level adjustment
1. Receive the 16-step grey scale video signal.
2. Set to VIDEO mode.
3. Enter the service mode.
4. Connect an oscilloscope to test point “TP201R”(+)
and chassis ground (-).
5. Select group no. “3”, item no. “14” and change data
value to adjust the pedestal level and black level to be
the same level.
6. Connect an oscilloscope to test point “TP201G”(+)
and chassis ground (-).
7. Select group no. “3”, item no. “15” and change data
value to adjust the pedestal level and black level to be
the same level.
8. Connect an oscilloscope to test point “TP201B”(+)
and chassis ground (-).
9. Select group no. “3”, item no. “16” and change data
value to adjust the pedestal level and black level to be
the same level.
Pedestal level = Black level
(a)
1211x Pedestal adjustment
- SERVICE MANUAL 1
- ■ Contents 2
- ■ Safety Instructions 3
- ■ Specifications 4
- Disassembly / Replaced Parts 5
- Optical Adjustments 5
- ■ Circuit Protections 6
- ■ Mechanical Disassemblies 8
- , Optical Unit removal (1) 11
- , Optical Unit removal (2) 12
- ⁄0 Fan (FN905) removal 13
- ■ Optical Parts Disassemblies 14
- , Optical Unit Top removal 17
- Locations and Directions 18
- Do not replace the LCD 19
- ■ Lamp Replacement 20
- ■ Optical Adjustments 21
- A with the 2.0mm hex driv 22
- C with the 2.0mm hex driver 22
- ■ Electrical Adjustments 25
- ● Circuit Adjustments 26
- 121v Signal Center adjustment 27
- 121c NRS adjustment 27
- 1211x Pedestal adjustment 27
- . Common Center adjustment 28
- 121m PC Gain adjustment 28
- , AV Gain adjustment 28
- 1⁄0 Gamma Shift adjustment 29
- 1⁄1 White Balance adjustment 29
- Electrical Adjustments 30
- Test Points and Locations 34
- ■ Troubleshooting 35
- Troubleshooting 36
- No Picture 37
- Lens Motor Problems 39
- No Sound 39
- ■ Control Port Functions 40
- Control Port Functions 41
- ■ Waveform 44
- ■ Cleaning 46
- ■ IC Block Diagrams 47
- IC Block Diagrams 48
- ● M62393 <D/A, IC2571> 51
- ■ Electrical Parts List 55
- Noise Filter 56
- ME3-XU4500, MF3-XU4600 57
- Electrical Parts List 58
- TEMP BOARD 79
- ACCESSORIES 80
- ■ Mechanical Parts List 81
- ● Optical Parts 82
- Mechanical Parts List 83
- *Optical filter(WV) 84
- *Polarized glass 84
- Model PLC-XU45 85
- Model PLC-XU46 85
- SANYO Electric Co., Ltd 88
- Schematic Diagrams 89
- Printed Wiring Board Drawings 89
- ■ Diagrams & Drawings 89
- Coil Reading 90
- Capacitor Reading 90
- Resistor Reading 90
- Diode/Transistor Type Reading 90
- ■ Circuit Block Diagram 91
- ■ Power Supply Lines 92
- 1AA4B10C3130A 93
- 1AA4B10C3130B 93
- 1AA4B10C3120A_A 94
- LAMP BALLAST 95
- 1AA4B10C3250A_C 96
- PCB_ME3A A9 97
- A10 PCB_ME3A 98
- ■ Schematic Diagrams 99
- MAIN BOARD 100
- AV BOARD 101
- DVI BOARD 101
- MAIN BOARD-1/6 102
- AIR MOUSE 103
- CONTROLLER 103
- MAIN BOARD-2/6 104
- DETECTOR 105
- MAIN BOARD-3/6 106
- AD9884AKS-100 106
- CONVERTER 106
- PW365-10U 107
- SYSTEM CONTROL 107
- MAIN BOARD-4/6 108
- ML60851CTB 109
- MAIN BOARD-5/6 110
- L3E07050K0A 111
- MAIN BOARD-6/6 112
- SCH_ME3A 114
- ● Transistor/FET 115
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