TM-9-2350-311-20-2

HOWITZER, MEDIUM, SELF-PROPELLED, 155MM; M109A2, M109A3, M109A4 AND M109A5

TECHNICAL MANUAL; UNIT MAINTENANCE MANUAL FOR CAB, ARMAMENT, SIGHTING AND FIRE CONTROL, ELEVATING AND TRAVERSING SYSTEMS AND ASSOCIATED COMPONENTS

DECEMBER 1993

TM-9-2350-311-20-2 - Page 227 of 828

TM 9–2350–311–20–2

3–115

CONTINUED FROM STEP P

1.

Place one multimeter lead on pin A of J803

connector and other lead to ground.

2.

Check for continuity.

Is continuity present?

yes

no

Q

Replace control box (para

8–16). If problem persists,

replace amplifier AM

1780/VRC (para 8–16).

Replace control box (para

8–16).

END OF TASK

J803 CONNECTOR PIN A

–

+

DRIVER’S CONTROL BOX