GMC 1976 ZEO 6083 Maintenance Manual page 638

Replace or correct
as required
RADIO/TAPE PLAYER DIAGNOSIS
CABLE AND OR
CONNECTORS LOOSE
OR DEFECTIVE
Replace or correct
as required .
SPEAKER
DEFECTIVE
Replace speaker
CABLE AND OR
CONNECTIONS LOOSE
OR DEFECTIVE
Check interconnecting
cable a nd connectors
Replace speaker .
Remove Tape Player
for repair .
NO "THUMP" HEARD IN
ONE CHANNEL ONLY
r
SPEAKER OK
SPEED TOO SLOW, TOO
FAST OR CONSTANTLY
CHANGING .
CONNECTIONS OK
SPEED NORMAL
Tape Player ok
CONNECTIONS LOOSE
OR DEFECTIVE
Check speakers
by substitution
RADIO
INOPERATIVE
THUMP HEARD
Remove tape
player for
repair .
NO "THUMP" HEARD
Check Fuse
RADIO
OPERATES
FUSE BLOWN
FUSE NOT BLOWN
A-1816
Figure 47-Tape Player Diagnosis
CHASSIS ELECTRICAL 12- 33
CABLE AND
CONNECTORS
OK
[Check
Check for loose
nting (tape
player or speakers)
Correct as
required .
Check speaker
connections
Tape player ok
LOOSE MTG . MOUNTING
LOOSE OR DEFECTIVE CONNECTIONS
(TAPE PLAYER OK
CONNECTIONS 0. K.
OR SPEAKERS)
RemoveRemove tape player -
Replace or
for repair Correct as required
Remove tape
correct as
I
player for re-
required .
pair .
TAPE PLAYER NOISY
TAPE PLAYER TAPE PLAYER DEAD
SPEEDINCORRECT
SET ALL CONTROLS
1 . Turn ignition switch
SET ALL CONTROLS
TO MID-POSITION .
to Acc . Position .
TO MID-POSITION .
INSERT TEST TA PE .
2 . Check radio operation .
INSERT TEST TAPE
Remove tape player
for repair
try new tape .
Refer to radio
diagnosis
NOISE ON
NOISE ON BOTH
NO NOISE
SET ALL CONTROLS TO MID-
ONE CHANNEL
CHANNELS
POSITION. INSERT TEST
TAPE AND LISTEN FOR
Jar tape player with
SPEAKER "THUMP" .
Check interconnecting
Check speaker and
heel of hand .
cable and connections .
power connections .
NOISY NO NOISE
Replace fuse and
check for short
or open in wiring
Check speaker and
power connections .
IMPORTANT: AM/FMISTEREOITAPE
COMBINATION RADIOS HAVE A CON-
CONNECTIDNS LOOSE
CONNECTIONS OK
VECTOR .
OR DEFECTIVE
Correct as required
Remove tape
player for
repair .