TM-9-1200-215-34-P
AUTOMATIC FIRE CONTROL SYSTEM (AFCS)
TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL
FEBRUARY 1999
TM-9-1200-215-34-P - Page 96 of 266
TM 9–1200–215–34&P
3–5
3–10.
MANUAL TROUBLESHOOTING PROCEDURES
DESCRIPTION
This task covers:
Manual Troubleshooting
INITIAL SETUP
Tools:
Tool Kits, JTK–17LAL, TK–101/G, or TK–105/G
(items 34, 35, & 36, Appendix E)
Pin Adapter, Test #16, #20, and #22
(items 4, 5, & 6, Appendix E)
Socket Adapter, Test #16, #20, and #22
(items 7, 8, & 9, Appendix E)
Electrical Lead (item 14, Appendix E)
Equipment Conditions:
Appropriate cable assembly removed; if not, remove
appropriate cable assembly in accordance with
procedure in paragraphs 3–17 or 3–18 as
required.
Personnel Required:
One MOS 35Y
NOTE
•
The following troubleshooting procedures consist of wiring diagrams locating box edge
connector pins to internal harness connector terminations. Continuity checks using these
diagrams are intended to be used when replacement of internal components fails to correct
an Electronic Shop, Transportable, AN/TSM–191(V)3, indicated fault. All other internal
troubleshooting will be performed by automated testing. Refer to TPS 12958912 for specific
DU troubleshooting procedures.
•
The continuity check is performed to test for the existence of a connection between two
contacts on the cable. The two probes from an ohmmeter are touched to the appropriate pair
of contacts and the ohmmeter is monitored. Low resistance readings (approaching 0 ohms)
show a good connection; high resistance readings (approaching infinity) show degraded or
broken connection. Figure 3–2 shows what contacts the probes should be placed on to check
for continuity on the DU–Keyboard cable assembly. Figure 3–3 shows what contacts the
probes should be placed on to check for continuity on the DU–Serial cable assembly.
MANUAL TROUBLESHOOTING
1.
Check for continuity using figures 3–2 and 3–3.
11
10
9
8
7
3
2
1
21
20
1
6
5
2
4
9
3
7
8
13
A1P3
A2P1
Figure 3–2. DU–Keyboard Cable Assembly
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