Audio Systems - Diagnosis; Cassette Am/Fm Radio Inoperative; Cassette Player Inoperative, Am/Fm Functions Ok - Daewoo Nubira Owner's Manual

Step
1 Check fuses EF1, F9, and F10.
Are fuses EF1, F9, and F10 blown?
2
1. Check for a short circuit and repair if neces-
sary.
2. Replace the blown fuses.
Is the repair complete?
3
1. Use a voltmeter to test for battery voltage at
fuses EF1 and F10.
2. Turn the ignition ON and test for battery volt-
age at fuse F9.
Does the battery voltage match the specified value
at fuses EF1, F9, and F10?
4 Repair the power supply circuit to the fuses.
Is the repair complete?
5
1. Disconnect the radio electrical connector.
2. Turn the ignition ON.
3. Use a voltmeter to test for battery voltage at
the radio connector terminals 4 and 5.
Does the battery voltage match the specified value
at both terminals?
6 Repair the open circuit between the radio connector
and the fuse.
Is the repair complete?
7 Use an ohmmeter to test the ground circuit at the ra-
dio connector terminal 14.
Does the resistance match the specified value?
8 Repair the open ground circuit between the radio
connector and ground G105.
Is the repair complete?
9 Replace the radio.
Is the repair complete?
Step
1 Verify the customer complaint.
Does the cassette player destroy tapes?
2 Using a good–quality tape, determine whether the
cassette player performs poorly or is inoperative.
Does the cassette player perform poorly?
3 Check the cassette player for obstructions behind
the tape door.
Is an obstruction found?
DAEWOO V–121 BL4
DIAGNOSIS
STEREO CASSETTE AM/FM RADIO

Cassette AM/FM Radio Inoperative

Action

Cassette Player Inoperative, AM/FM Functions OK

Action
AUDIO SYSTEMS 9F – 3
Value(s) Yes
Go to Step 2
System OK
11–14 v Go to Step 5
System OK
11–14 v Go to Step 7
System OK
0–0.5 W
Go to Step 9
System OK
System OK
Value(s) Yes
Go to Step 5
Go to Step 5
Go to Step 4
No
Go to Step 3
Go to Step 4
Go to Step 6
Go to Step 8
No
Go to Step 2
Go to Step 3
Go to Step 8