BenQ PE8700 service manual DMD board trouble shooting guide, Yes

3. DMD board trouble shooting guide.

RESETZ And		NO
POWERGOO
D?
	YES
Color wheel		NO
Spinning?
	YES
		NO
Color wheel
Feedback (J3
pin3) ok?

YES

Lamp light ok? NO

1.No RESETZ check main board and translation board.

2.No POWERGOOD check main board

1.Check Color wheel and CW connector (J4)

2.CW power supply P12V of U13

1.Check CW sensor board and CW tag

2.Feedback 150Hz

1.Check J1 pin 1 (lampon) , normal status is low

2.Check J1 pin 3(lamp light feedback) should be low.

YES

Normal Image on screen ?

(32-Gray Pattern in Factory mode is recommended)

DMD pixels always on

Horizontal dark/bright lines

Check DMD socket.

Check C-spring

Check DMD B/D : DAD1000(U1) VCC (5V), VBIAS (23 ~ 26V), VRST (-26V)

Vertical dark/bright lines

Color missing

Check C-spring

Check DMD socket.

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