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 TM 11-5805-387-34-2
MALFUNCTION/SYMPTOM
PROBABLE CAUSE
TEST PROCEDURE
INDICATION
YES
NO
(16) NO CURRENT IN SEND DC LOOP.
Defective: Meter function switch S3. Connector
J6. Circuit board A8.
Do all continuity and resistance checks with all power removed.
1. Check continuity of METER FUNCTION
Continuity
Go to 2.
Replace
switch (fig. FO-8).
defective
switch S3
2. Connect ME-26B/U between pin A of
Continuity
Go to 3.
Replace
connector J6 and terminal 8 of board A8.
defective
Check for continuity.
connector J6
3. Connect ME-26B/U between pin C of
Continuity
Go to 4.
Replace
connector J6 and terminal 9 of board A8.
defective
connector J6
4. Connect ME-26B/U between terminals 2
120 to 140 vdc
Go to 5.
Replace
and 3 on board A8. Measure voltage.
defective
board A8
5. Connect ME-26B/U between terminals 4
120 to 140 vdc
Go to 6.
Replace
and 5 on board A8. Measure voltage.
defective
board A8
6. Connect ME-26B/U between terminals 10
120 to 140 vdc
------------
Replace
and 11 on board A8. Measure voltage.
defective
board A8
3-17
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