Checking The Resolution Change Ic Movement - NEC MultiSync 20WGX2 Series Service Manual

8. Checking the Resolution Change IC Movement

Is there +3.3V supply on I307 3V3 power pins
OK
Is there +3.3V supply on I306 1V8 power pins
OK
Is 14.318MHz clock input to I308 pin 162 and pin
163 at TTL level during Power On?
OK
Is +5.0V supplied to I308 pin 165 at low level
(Reset signal)?
OK
Failure point
I312 failure
Proceed "9. Checking the DC/DC converter circuit"
NG
section.
Proceed "9. Checking the DC/DC converter circuit"
NG
section.
NG Is 14.318MHz clock output from X301 pin 1 at TTL
level during Power On?
OK
Failure point
Print wire broke between X301 pin 1
and I308 pin 162.
NG Check the output of 0V "L" pulse from SW301.
OK
Failure point
Print wire broke between SW301 and
I308 pin 165.
6 - 10
Failure point
NG
X301 failure
Failure point
NG
SW301 failure