Checking The Dc/Dc Converter Circuit - NEC MultiSync 20WGX2 Series Service Manual

9. Checking the DC/DC Converter Circuit

Check if the 5V is output from P303 pin 3, 4, 5 to
Check the output of 3.3V, 1.8V line voltage from
Printed wire broke between I307, I306 pin 2
and I308 power supply pin.
I307, I306 pin 3.
OK
I307, I306 pin 2.
OK
Failure point
Printed wire broke between P303 pin 3, 4, 5 and
NG
NG
I307, I306 failure
6 - 11
I307, I306 pin 3.
Failure point