CHECK POWER SUPPLY CM.

1) Disconnect the collation CM connector.

2) Using a tester, measure the voltage between the power supply CM and chassis ground.

Connector & terminal

(B420) No. 7 (+) — Chassis ground (−):

QUESTION

Is the voltage 1 V or less?

Yes No

Replace the power supply CM.

Repair or replace the open or short circuit of the harness.