TM 5-2350-378-23&P
0021
APPARENT HYDRAULIC DIAGNOSTIC CENTER (HDC) SYSTEM PROBLEM - Continued
STEP
9.
Check for 28 VDC at connector W1J1 pins A and B.
Disconnect umbilical cable connector W4P4 from power cable connector W1J1, on umbilical disconnect
bracket (Figures 9 and 10).
HDC
CONTROL BOX
CONTROL BOX
CONNECTOR J3
CONTROL BOX
CONNECTOR J1
CONTROL BOX
CONNECTOR J2
UMBILICAL CABLE
CONNECTOR W4P1
UMBILICAL CABLE
CONNECTOR W4P2
UMBILICAL CABLE
CONNECTOR W4P3
T01909HDC
Figure 9.
Umbilical Cable Assembly W4 Connection to Umbilical Cable Disconnect Bracket.
A
C
B
PLUG
T01910HDC
Figure 10. Pin Layout for Connector W1J1.
CONDITION/INDICATION
Is 28 VDC present between power cable connector W1J1, pins A and B, on umbilical cable disconnect bracket?
DECISION
YES - Go to Step (10).
NO - Go to Step (12).
