Quantum Data 801GX Instrukcja Obsługi Pobierz pdf (Strona 45)

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

3-5. No Picture – Video Only (RGB-Good)

No Picture -

Video Only (RGB-Good)

Is a

Voltage Input

at Pin 6 of EVSI on the

Main PWB VIDEO Input

Terminal?

Power Unit

(Circuit)

PWB

Signal

Yes 6 + 9V

Are

the Input Signals

Output at Pins 1, 3, 5 of

EVSI on the Main PWB

VIDEO(*) Input

Terminal?

VIDEO Input

Terminal PWB

Yes

*Input Both S Signal

& Composite Video Signal

49 : (CHK002) : VIDEO. R signal

47 : (CHK004) : VIDEO. G signal

45 : (CHK006) : VIDEO. B signal

36 : (CHK012) : VIDEO. H sync

35 : (CHK013) : VIDEO. V sync

1 Video signal

3 Y signal

5 C signal

Are

Signasl Input at

each Pin of EDI1 on the

Main PWB?

RGB Input

Terminal PWB

Signal

PWB

Yes

Power Unit

(Circuit)

Main PWB

Check at operating mode

1 2 ... 40 41 42 43 44 45 46 47 48 49 50 ... 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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Quantum Data 801GX Instrukcja Obsługi Strona 45

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