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 141 of 828

TM 9–2350–311–20–2

3–32

3–3

TROUBLESHOOTING CHART — CONTINUED

c.

CAB TRAVERSING SYSTEM — CONTINUED

TO COLLIMATOR

BLOCK DIAGRAM

INDICATOR

LIGHT 1

TERMINAL 2

INDICATOR

LIGHT 2

SWITCH 3

TERMINAL 2

TERMINAL 1

WIRE 625A/645

SWITCH 2

WIRE 625A

WIRE 623

TERMINAL 2

WIRE 819B

CB 1 TERMINAL B

CIRCUIT

BREAKER

CB 1

TERMINAL A

WIRE 100

GROUND

WIRE

CR 1 CATHODE

TO COLLIMATOR

TERMINAL 3

TERMINAL 1

SWITCH 1

TERMINAL 2

TERMINAL 3

TERMINAL 5

TERMINAL 6

CR 1 ANODE