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 114 of 180

TM 9-6920-430-14

Table

3-3.

CPU 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 GPU

THROUGH SUPPLY CHANNELS FOR REPAIR.

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

1. GPU FAILS TO START WHEN ON PUSHBUTTON IS DEPRESSED.

IS AC POWER CABLE CONNECTED TO SOURCE?

IF NOT, CONNECT TO AC SOURCE.

IS ON SWITCH DEFECTIVE?

REMOVE ON/OFF SWITCH ASSEMBLY ACCESS PLATE. USING AN OHMETER

TEST ON SWITCH FOR CONTINUITY BY PLACING TEST LEADS ACROSS THE

REAR SWITCH ASSEMBLY TERMINALS AND PRESSING THE PUSHBUTTON.

IF A CONTINUITY INDICATION IN NOT OBTAINED THE SWITCH IS DEFECTIVE.

REPLACE DEFECTIVE SWITCH IN ACCORDANCE WITH PARA. 3-24,

HAS THERMAL OVERLOAD SWITCH OPENED?

OPEN THE LEFT ACCESS DOOR AND PRESS THE STARTER RELAY–RESET BUTTON

IS SAFETY COVER PROPERLY SECURED?

IF NOT, SECURE SAFETY COVER.

3-54

IS GPU SAFETY INTERLOCK SWITCH (l), STARTER RELAY (2), OR MOTOR (3) DEFECTIVE?

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