Quantum Data 801GX Wartungshandbuch PDF herunterladen (Seite 44)

3M Multimedia Projector MP8670/8745/8755/8770 Troubleshooting

3-4. No Picture – RGB Only

No Picture -

RGB Only

the Picture Displayed with

either RGB1 or RGB2

Selected?

Yes

Is the

1/2 Selected

Signal Changed at pin 43

(CHK007) of EDI1

on the Main

PWB?

Yes

"L"=RGB1

"H" =RGB2

(H = 5V)

Main PWB

RGB Input

Terminal PWB

Are

Signals Input at each

Pin of EDI1 on the

Main PWB?

Yes

Main

PWB

10, 11: (CHK0031) : R signal

6, 7 : (CHK0035) : G signal

2, 3 : (CHK0037) : B signal

39 : (CHK010) : H sync

38 : (CHK011) : V sync

RGB Input

Terminal PWB

Signal

PWB

Power Unit

(Circuit)

Check at operating mode -

"No Input Detected"

Not Displayed

1 2 ... 39 40 41 42 43 44 45 46 47 48 49 ... 59 60

Service Manual 1
Projector 1
1. Adjustments 3
(#1 Magnetic Long Shaft) 4
(3/16” or 1/4” Blade) 4
1-5. Cleaning LCD Panels 5
1-6. Convergence 6
1-6-1. Necessary Tools 6
1-6-2. Set Up Test Generator 6
1-6-3. Convergence Check 7
1-7. White Balance 8
1-7-1. Necessary Tools 8
1-7-3. Access Test Menu 9
1-7-4. S/H Timing Adjustment 11
2Alignment 12
1-7-6. Ghost Adjustment 13
Ghost is at a minimum 14
1-7-7. Flicker Adjustment 16
X = 0.280 ±± 0.005 19
Y = 0.340 ±± 0.01 19
Y = 0.345 ±± 0.01 20
X = 0.270 ±± 0.03 20
Y = 0.320 ±± 0.03 20
No. 2 = Y2 (lux) 22
No. 3 = Y3 (lux) 22
2. Disassembly/Reassembly 27
2-3-1. Remove Top Cover 28
2-3-2. Remove Main PWB Board 30
2-3-3. Remove Service Board 31
2-3-5. Remove RGB Input Board 33
Dichroic 34
2-3-7. Remove Lens Assembly 35
2-3-8. Remove Ballast 36
2-3-10. Remove DC Power Fan 38
2-3-11. Remove Exhaust Fan 39
3. Troubleshooting 40
3-3. Lamp Does Not Light 42
3 Fans have Rotation Sensors 43
3-4. No Picture – RGB Only 44
3-7. No Sound 47
RS232C PS/2 ADB Serial 48
4. Theory and Diagrams 52
4-2. Color Theory 54
4-2-1. Color 54
4-3. LCD Structure Theory 55
4-3-1. LCD Cells 55
4-3-3. Example Projection 55
4-4. Lamp Theory 56
4-5. Optical System Layout 57
4-6. Block Diagram 58
4-7. Wire Diagrams 59

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