Checking The Operation Of Cpu - NEC MultiSync LCD1550V Service Manual
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- Service manual (101 pages) ,
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11. Checking the operation of CPU
Is there +5.0V supply on U8 pin 32.
NG
OK
Is 14.318MHz clock input to U3 pin 3, 4 at TTL level?
NG
Failure point
Y1 failure.
OK
Failure point
U3 failure.
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Printed wire broke between output J2 pin1, 2 and U8
power supply pin 32.
6-16
Failure point
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