BenQ DLP PROJECTOR PE8700 - Manual (Page 44)

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3. DMD board trouble shooting guide.
NO
NO
YES
RESETZ And
POWERGOO
D?
1. No RESETZ check main board and
translation board.
2. No POWERGOOD check main board
Color wheel
Spinning?
1. Check Color wheel and CW connector (J4)
2. CW power supply P12V of U13
Color wheel
Feedback (J3
pin3) ok?
1. Check CW sensor board and CW tag
2. Feedback 150Hz
Lamp light ok?
1. Check J1 pin 1 (lampon) , normal status is
low
2. Check J1 pin 3(lamp light feedback) should
be low.
Normal Image
on screen ?
( 32-Gray Pattern
in Factory mode
is
recommended)
Check DMD socket.
NO
NO
DMD pixels always on
YES
YES
YES
Check C-spring
Check DMD B/D : DAD1000(U1) VCC (5V), VBIAS
(23 ~ 26V), VRST (-26V)
Check C-spring
Horizontal dark/bright lines
Vertical dark/bright lines
Check DMD socket.
Color missing