BenQ MS500 Product Service Manual page 88

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Chapter 1 - System Analysis
Keypad LED OK
If Power On, Lamp
No Signal?
Power Auto Turn Off
IR Remote Control
Pixel Fail?
Yes
On?
Yes
Yes
No
No
Yes
NG?
No
Yes
Step:
No
1. Check Lamp Door
2. Check Power Board and Interlock
3. Check Connection between PWR
BD and Main BD
4. Check Main Board
1. Check Lampen wire , Lamp wire
No
and Ballast wire
2. Check C/W and wire connection
3. Check Main board
4. Check Lamp
5. Check Ballast
1. Check Input Cable
2. Check OSD Source set up
3. Check Main board
1. Check OSD Lamp Hours
Yes
2. Check Lamp Door
3. Check Lamp still light or not?
4. Check Fan still spin or not?
5. Check Thermal status
1. Check Remote module battery
2. Check Remote module
3. Check IR Reciver on Main board
4. Check IR Reciver on IR board
1. Check the connection between
Main BD and Chip BD
2. Check the connection between OP
engine and DMD Chip
3. Check Chip board
4. Check Main board
88

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