NEC MultiSync LCD1550V Service Manual page 59

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Check the LOAD, POL, REV, CPV, OE of positive

polarity are ouput on CN2 pin 30, 31, 32, 37, 38.

Check the data signal output on CN3 and CN2 R, G,

B data pin.

Failure point

The cable broke between CN2, CN3 and LCD module.

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6-5

Failure point

1) U3 failure.

2) Printed wire broke between U3 and

CN3 pin 30, 31, 32, 37, 38.

3)R69, 70, 71, 74, 75, L15,16, 17, 20

or L21 failure

Failure point

1) U3 failure.

2) Printed wire broke between

U3, CN2 and CN3 data line.

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