TM-9-2350-277-20-1 Unit Maintenance Manual Volume 1 M113A3 M577A3 M1064A3 M1068A3 M58 Download
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TM 9-2350-277-20-1 PHONE EXTENSION BOX A14 POST(S) INOPERATIVE (M1068A3 ONLY)—Continued 0114 00 T 1. Remove cable W129 plug P2 (1) from Phone Extension Box A14 jack J1 (2). 2. Measure resistance between posts (3) and pins of jack J1 (2) as follows: Post 1 (Blk) to pin A Post 1 (Red) to pin B Post 2 (Blk) to pin C Post 2 (Red) to pin D Post 3 (Blk) to pin E Post 3 (Red) to pin F Post 4 (Blk) to pin G Post 4 (Red) to pin H Post 5 (Blk) to pin J Post 5 (Red) to pin K Post 6 (Blk) to pin L Post 6 (Red) to pin M Post 7 (Blk) to pin N Post 7 (Red) to pin P Post 8 (Blk) to pin R Post 8 (Red) to pin S Post 9 (Blk) to pin T Post 9 (Red) to pin U Post 10 (Blk) to pin V Post 10 (Red) to pin W Post 11 (Blk) to pin X Post 11 (Red) to pin Y Post 12 (Blk) to pin Z Post 12 (Red) to pin a 3. Does multimeter read 0 ohms for each measurement? YES NO TN 1. Replace Phone Extension Box A14. See TM 11-7010-256-12&P. 2. Verify no faults found. 0114 00-2