Checking The Resolution Change Ic Movement - NEC MultiSync LCD1550ME Service Manual

8. Checking the resolution change IC movement

Is there +3.3V supply on I306 pin 77, 79, 84, 96, 92, 88, 8, 129, 136,
139, 137, 143, 11, 21, 58, 108, 149, 12, 33, 40 and 65.
NG
Proceed "Checking the DC/DC converter circuit" section.
OK
Is 20MHz clock input to I306 pin 141 at TTL level?
NG
Is 20MHz clock output from X301 at TTL level?
OK
OK
Print wire broke between
X301 and I306 pin 141.
Is +5.0V supplied to I306 pin 100 at
High level?
NG
Check the output of 5.0V "H" pulse from I301 pin 6.
OK
OK
Failure point
I306 failure.
Print wire broke between
I301 pin 6 and I306 pin 100.
NG
Failure point
X301 failure.
Failure point
NG
Is 5.0V supplied to I301 pin 7?
Failure point
NG
Failure point
OK
1) FB318 failure
2) Power source
Failure point
I301 failure.
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