BenQ DLP PROJECTOR PE8700 User Manual

Page 43

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42

(3) CPU (U10) trouble shooting guide :

YES

YES

YES

Check +3Vs

(pin92)

Check X1

crystal

1. Check C75, C76

2. replace

X1

RESET

Successful?

check U18, make sure U18

pin1 has delayed for certain

period of time ,from L go H.

1. Check U9(SRAM), check CPU_LCS_N (pin 58) and

CPU_BHE_N is active?

2. Check U12(Flash), check R68 and CPU_UCS_N (pin

57) is active?

NO

NO

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