ACSC2 Power Supply Fault

TASK 21-61-00-810-886-A
ACSC2 Power Supply Fault

1. Possible Causes

2. Fault Confirmation
Subtask 21-61-00-710-172-A ** ON A/C NOT FOR ALL

A. Not applicable.

3. Fault Isolation
Subtask 21-61-00-810-220-A ** ON A/C NOT FOR ALL

A. If the GROUND REPORT gives the maintenance message ACSC2 (57HH) / POWER SUPPLY INTERRUPT ACSC2:
(1) Do the checks which follow:
(a) do a check for 28VDC at:
1 For LANE A,

ACSC2 (57HH)C pin 3.

2 FOR LANE B,

ACSC2 (57HH)C pin 2.

(b) do a check for 115VAC at:
1 For LANE A,

ACSC2 (57HH)C pin 4.

2 FOR LANE B,

ACSC2 (57HH)C pin 1.

(2) If the fault continues:

do the trouble shooting of the electrical power supply (Ref. TSM Chapter 24).

[Rev.8 from Aug 2018] 2026.04.04 04:24:57 UTC