Checking The Resolution Change Ic Movement - NEC MultiSync LCD1550V Service Manual
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Also See for MultiSync LCD1550V:
- Service manual (101 pages) ,
- User manual (48 pages) ,
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9. Checking the resolution change IC movement
Is there +3.3V supply on U3 pins 65, 76, 86, 121, 143, 157, 167, 198, 193, 183, 179, 175, 188.
Is there +2.5V supply on U3 pins 5, 7, 10, 11, 12, 15, 18, 21, 22, 25, 28, 31, 35, 36, 42, 63, 76,
88, 119, 141, 159, 162, 163, 166, 169, 170, 189, 190, 196.
OK
Is 14.318MHz clock input to U3 pin 3, 4 at
TTL level.?
NG
OK
Proceed section 11 "Checking the
operation of CPU"
NG
Is 14.318MHz clock output from Y1 at TTL
level.?
OK
Failure point
Y1 failure
Proceed section 11 "Checking the
operation of CPU"
6-14
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