TM-9-6920-430-14

COOLANT RECHARGING UNIT, TRAINING GUIDED MISSILE SYSTEM M80 AND CHARGER, BATTERY PP-7309/T

TECHNICAL MANUAL; OPERATOR’S AND ORGANIZATIONAL DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL

AUGUST 1980

TM-9-6920-430-14 - Page 120 of 180

TM 9-6920-430-14

Table 3-4. Battery Charger Troubleshooting Guidance Chart

NOTE:

THOSE STEPS MARKED WITH AN ASTERISK (*) SYMBOL

ARE FOR REPAIRS TO BE ACCOMPLISHED AT MTS

LOCATION ONLY. OTHER USERS WILL TURN IN BATTERY

CHARGER THROUGH SUPPLY CHANNELS FOR REPAIR.

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

1. POWER LAMP DOES NOT ILLUMINATE.

IS AC POWER CABLE CONNECTED TO SOURCE?

IF NOT, CONNECT TO AC SOURCE

IS POWER LAMP DEFECTIVE?

REPLACE WITH SPARE LAMP IN LID COVER.

IS OVERLOAD PROTECTION FUSE (DC 1 AMP) FUSE OPEN?

VISUALLY INSPECT FUSE. IF OPEN, REPLACE WITH SPARE FUSE IN PANEL

ASSEMBLY SPARE FUSE HOLDER.

2. ALL CHARGE LAMPS DO NOT ILLUMINATE WITH

SELECTOR SWITCH IN CHARGE POSITION.

PRESS TO TEST

IF LAMP ILLUMINATES IN TEST POSITION, BUT DOES NOT ILLUMINATE IN

CHARGE MODE, THE TEMPERATURE OF BATTERY MAY BE BE LOW 50°F.

LEAVE SWITCH IN CHARGE MODE TO AL LOW SUFFICIENT TIME (UP TO 2 HOURS)

FOR THE HEATER BLANKETS TO WARM BATTERIES IN THE CARRYING CASE.

CHECK BATTERY CARRYING CASE TO ASSURE THAT

BATTERY IS PROPERLY SEATED IN BATTERY COMPARTMENT,

REMOVE AND REINSERT TO ASSURE GOOD TERMINAL CONTACT.

IS BATTERY DEFECTIVE?

REPLACE WITH KNOWN GOOD BATTERY.

IS TOGGLE SWITCH DEFECTIVE?

CHECK TOGGLE SWITCH FOR CONTINUTY. IF DEFECTIVE, REPLACE IN

ACCORDANCE WITH PARA 3-29, PAGE 3-85.

3-60

Change 1

M1416972A