3) Main board
1. Check that the 15.5V is observed at pins 1-3 of K3C.
2. Check that the 6V is observed at pins 6-8 of K3C.
3. Check that the -5V is observed at pin 9 of K3C.
4. Check that the 5V is observed at pins 10-11 of K3C.
5. Check that the 6V is observed at pins 2-4 of K3D.
6. Check that the 15.5V is observed at pins 7-8 of K3D.
7. Check that the 5V_SW signal is correct.
Pin 11 of K3D.....................................H : ON
8. Check that the LAMP BST_SW signal is correct.
Pin 12 of K3D.....................................H : ON
9. Check that the POWER FAIL signal is correct.
Pin 13 of K3D.....................................L : abnormal
10. Check that the 12V is observed at test points TP6601. TP6602 and TP6603.
11. Check that the LAMP_SW signal is correct.
Pin 4 of K8CC.....................................H : On
12. Check that the LAMP_ERR signal is correct.
Pin 1 of K8CC.....................................L : On
13. Check that the POWER FAIL signal is correct.
Pin 2 of IC1851 ..................................L : abnormal
14. Check that the Sensor IC(IC2831) detects abnormal temperature inside the projector.
4) Component board
1. Check Power Supply and switching circuit
Check ICs IC2641 to IC2691
2. Check that the POWER FAIL signal is correct.
Pin 11-12 of K3A ................................L : abnormal
3. Check that the FAN_DRIVE signal is correct.
Pin 7-8 of K3A ....................................H : On
Part 4: Troubleshooting
4-2
Summary of Contents for D78-5132
Page 2: ......
Page 3: ...CANON Multimedia Projector LV 7105U D78 5132 LV 7105E D78 5133 SERVICE SMANUAL ...
Page 10: ......
Page 11: ...Part 1 General Information ...
Page 12: ......
Page 33: ...Part 2 Repair Information ...
Page 34: ......
Page 54: ......
Page 55: ...Part 3 Adjustment ...
Page 56: ......
Page 77: ...Part 4 Troubleshooting ...
Page 78: ......
Page 81: ... Memo Part 4 Troubleshooting 4 3 ...
Page 94: ...Part 4 Troubleshooting 4 16 M62358FP DAC IC431 CXD3503R White Uniformity Compensation IC471 ...
Page 96: ...Part 4 Troubleshooting 4 18 IDT71V016S RAM IC811 CXA2016S Sync Separator IC1021 ...
Page 97: ...Part 4 Troubleshooting 4 19 MC10H351ML IC1501 LM76CHMX Thermal Sensor IC1831 IC1832 ...
Page 99: ...Part 4 Troubleshooting 4 21 TC4053BF Switching IC5001 SAA7114H Digital Video Processor IC5101 ...
Page 100: ...Part 4 Troubleshooting 4 22 ...
Page 101: ...Part 5 Parts Catalog ...
Page 102: ......
Page 104: ......
Page 117: ......
Page 118: ...Part 6 Electrical Diagrams ...
Page 119: ......