Checking The Dc/Dc Converter Circuit - Elo TouchSystems ET17 XXL Series Service Manual

9. Checking the DC/DC converter circuit

Check if the 5V is output from I001 pin 2.
NG
OK
Check the output of 3.3V line voltage from
I003 pin 2.
NG
OK
Failure point
Printed wire broke between I003 pin2 and
I303 power supply pin.
Printed wire broke between
I001 pin 1 and L003 pin 2.
Is the output L005 being
inputted to I003 pin 1?
NG
OK
Failure point
I003 failure.
- -
61
Failure point
Printed wire broke between
I003 pin1 and output of
L005.