ACSC1 Lane 1+2 28VDC Supply Fault

TASK 21-61-00-810-914-A
ACSC1 Lane 1+2 28VDC Supply Fault

1. Possible Causes

2. Fault Confirmation
Subtask 21-61-00-710-206-A ** ON A/C NOT FOR ALL

A. Not applicable.

3. Fault Isolation
Subtask 21-61-00-810-250-A ** ON A/C NOT FOR ALL

A. If the GROUND REPORT gives the maintenance message ACSC1(47HH)/TEM CTL SYS1 CHAN A+B 28VDC SPL INT:
(1) Do the checks which follow:
(a) do a check for 28VDC at:
1 For LANE A,

ACSC1 (47HH)C pin 3.

2 For LANE B,

ACSC1 (47HH)C pin 2.

(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 04:24:59 UTC