Loss of the High Speed Bus Input Detected by the DMC1

TASK 31-63-81-810-856-A
Loss of the High Speed Bus Input Detected by the DMC1

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 31-60-00-740-002	Perform Electronic Instrument System (EIS) Input Test
AMM 31-63-34-000-001	Removal of the DMC
AMM 31-63-34-400-001	Installation of the DMC
ASM 316805

3. Fault Confirmation
Subtask 31-63-81-740-160-A ** ON A/C NOT FOR ALL

A. Test
Do the EIS input test AMM 31-60-00-740-002.

4. Fault Isolation
Subtask 31-63-81-810-113-A ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message:
DMC1: NO DMC HS3 DATA

(1) If the fault continues:

do a check and repair the wiring from DMC1 (1WT1) pins AA/13E, 13F to the first terminal block ASM 316805.

Subtask 31-63-81-740-161-A ** ON A/C NOT FOR ALL

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:30:59 UTC