|
| |
TM 11-5820-890-20-2
4-7
4.2.
TROUBLESHOOTING FLOWCHARTS. Continued
CHART 1
RCU DISPLAY READS •OPEN" DURING SELF TEST.
(Sheet 3 of 8)
1. REMOVE FIELD WIRE FROM RCU BATTERY
BOX E1 AND E2 TERMINALS.
2. SET UP DIGITAL VOLTMETER AS AN AC
VOLTMETER AT THE 2 V ac RANGE AND SET
PEAK HOLD TO ON.
3. CONNECT PROBES TO RCU BATTERY BOX
E1 AND E2 TERMINALS. GROUND LEAD CAN
BE PLACED AT EITHER TERMINAL.
4. RESET RCU AS FOLLOWS:
COMSEC: CT
FCTN: TST
5. OBSERVE AC VOLTMETER WHEN RCU
DISPLAY READS OPEN.
NO
YES
DISMOUNTED
RCU
?
NO
YES
AC VOLTMETER
READS
GREATER THAN
0.7 V ac
?
4
SH 4
REPLACE FIELD WIRE.
2
SH 3
5
SH 7
|
