Daewoo Nubira. Service manual - part 69

 

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Daewoo Nubira. Service manual - part 69

 

 

AUDIO SYSTEMS  9F – 3

DAEWOO V–121 BL4

DIAGNOSIS

STEREO CASSETTE AM/FM RADIO

Cassette AM/FM Radio Inoperative

Step

Action

Value(s)

Yes

No

1

Check fuses EF1, F9, and F10.
Are fuses EF1, F9, and F10 blown?

Go to Step 2

Go to Step 3

2

1.  Check for a short circuit and repair if neces-

sary.

2.  Replace the blown fuses.

Is the repair complete?

System OK

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?

11–14 v

Go to Step 5

Go to Step 4

4

Repair the power supply circuit to the fuses.
Is the repair complete?

System OK

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?

11–14 v

Go to Step 7

Go to Step 6

6

Repair the open circuit between the radio connector
and the fuse.
Is the repair complete?

System OK

7

Use an ohmmeter to test the ground circuit at the ra-
dio connector terminal 14.
Does the resistance match the specified value?

0–0.5 

W

Go to Step 9

Go to Step 8

8

Repair the open ground circuit between the radio
connector and ground G105.
Is the repair complete?

System OK

9

Replace the radio.
Is the repair complete?

System OK

 

Cassette Player Inoperative, AM/FM Functions OK

Step

Action

Value(s)

Yes

No

1

Verify the customer complaint.
Does the cassette player destroy tapes?

Go to Step 5

Go to Step 2

2

Using a good–quality tape, determine whether the
cassette player performs poorly or is inoperative.
Does the cassette player perform poorly?

Go to Step 5

Go to Step 3

3

Check the cassette player for obstructions behind
the tape door.
Is an obstruction found?

Go to Step 4

Go to Step 8

9F – 4

I

AUDIO SYSTEMS

DAEWOO V–121 BL4

Step

No

Yes

Value(s)

Action

4

Check to see if the obstruction can be removed us-
ing gentle force.
Is the obstruction removed?

Go to Step 5

Go to Step 6

5

Clean the cassette player head, the capstan, and the
drive system.
Does the tape play properly?

Go to Step 7

Go to Step 6

6

Replace the radio.
Is the repair complete?

System OK

7

Check the cassette player for normal operation.
Is the repair complete?

System OK

8

Advise the owner of a defective or worn tape.
Is the repair complete?

System OK

 

AM Does Not Work, FM and Cassette OK

Step

Action

Value(s)

Yes

No

1

Replace the radio.
Is the repair comlpete?

 

FM Radio Does Not Work, AM and Cassette OK

Step

Action

Value(s)

Yes

No

1

1.  Unplug the antenna cable from the antenna.
2.  Connect the test antenna to the antenna cable.
3.  Check the FM radio reception.

Is the FM radio operating properly?

Go to Step 2

Go to Step 3

2

Replace the antenna.
Is the repair complete?

System OK

3

1.  Remove the radio from the instrument panel.
2.  Unplug the antenna cable from the radio.
3.  Plug the test antenna into the radio.
4.  Check the FM radio reception.

Is the FM radio operating properly?

Go to Step 4

Go to Step 5

4

Replace the antenna cable between the radio and
the antenna.
Is the repair complete?

System OK

5

Replace the radio.
Is the repair complete?

System OK

 

AUDIO SYSTEMS  9F – 5

DAEWOO V–121 BL4

SPEAKERS

Front Speakers Distorted or Inoperative, Rest of Audio System OK

Step

Action

Value(s)

Yes

No

1

1.  Turn the ignition and the radio ON.
2.  Check for distorted or inoperative front speak-

ers using the fader and the balance controls
with all of the sources (AM, FM, tape, CD).

Are the front speakers distorted?

Go to Step 2

Go to Step 4

2

Check the speaker and the door area for damage,
rattles, or vibration.
Is there anything loose or in the way of the speaker
causing the distortion?

Go to Step 3

Go to Step 4

3

Make the necessary repairs to secure the compo-
nent causing the distortion.
Is the repair complete?

System OK

4

1.  Remove the front speakers and disconnect the

speaker connector.

2.  Using an ohmmeter, test the speaker wires for

a short to ground.

Does the ohmmeter show the specified value?

 

R

Go to Step 6

Go to Step 5

5

Repair the short circuit between the front speaker
connector and the radio connector.
Is the repair complete?

System OK

6

Substitute a known good speaker for the speaker
causing the distortion.
Is the distortion eliminated?

Go to Step 7

Go to Step 8

7

Replace the speaker.
Is the repair complete?

System OK

8

Replace the radio.
Is the repair complete?

System OK

 

Rear Speakers Distorted or Inoperative, Rest of Audio System OK

Step

Action

Value(s)

Yes

No

1

1.  Turn the ignition and the radio ON.
2.  Check for distorted or inoperative rear speak-

ers using the fader and the balance controls
with all the of the sources (AM, FM, tape, CD).

Are the rear speakers distorted?

Go to Step 2

Go to Step 4

2

Check the speakers, the rear deck, and the trunk
area for damage, rattles, or vibration.
Is there anything loose or in the way of the speaker
causing the distortion?

Go to Step 3

Go to Step 4

3

Make the necessary repairs to secure the compo-
nent causing the distortion.
Is the repair complete?

System OK

4

1.  Disconnect the rear speakers.
2.  Using an ohmmeter, test the speaker wires for

a short to ground.

Does the ohmmeter show the specified value?

 

R

Go to Step 6

Go to Step 5

9F – 6

I

AUDIO SYSTEMS

DAEWOO V–121 BL4

Step

No

Yes

Value(s)

Action

5

Repair the short circuit between the rear speaker
connector and the radio connector.
Is the repair complete?

System OK

6

Substitute a known good speaker for the speaker
causing the distortion.
Is the distortion eliminated?

Go to Step 7

Go to Step 8

7

Replace the speaker.
Is the repair complete?

System OK

8

Replace the radio.
Is the repair complete?

System OK

 

ANTENNA

Power Antenna Does Not Work

Step

Action

Value(s)

Yes

No

1

Check fuse EF29.
Is fuse EF29 blown?

Go to Step 2

Go to Step 3

2

1.  Check for a short circuit and repair if neces-

sary.

2.  Replace the blown fuse.

Is the repair complete?

System OK

3

Use a voltmeter to test for battery voltage at fuse
EF29.
Does the battery voltage match the specified value?

11–14 v

Go to Step 5

Go to Step 4

4

Repair the open power supply circuit to fuse EF29.
Is the repair complete?

System OK

5

Use a voltmeter to test for battery voltage at power
antenna connector terminal 1.
Does the battery voltage match the specified value?

11–14 v

Go to Step 7

Go to Step 6

6

Repair the open circuit between power antenna con-
nector terminal 1 and fuse EF29.
Is the repair complete?

System OK

7

Use an ohmmeter to test the ground circuit at power
antenna connector terminal 2.
Does the resistance match the specified value?

0 – 0.5 

W

Go to Step 9

Go to Step 8

8

Repair the open ground circuit between power an-
tenna connector terminal 2 and ground G303.
Is the repair complete?

System OK

9

1.  Turn the ignition ON.
2.  Turn the radio ON.
3.  Use a voltmeter to test for battery voltage at

power antenna connector terminal 3.

Does the battery voltage match the specified value?

11–14 v

Go to Step 10

Go to Step 11

10

Replace the power antenna.
Is the repair complete?

System OK

11

1.  Turn the ignition ON.
2.  Turn the radio ON.
3.  Use a voltmeter to test for battery voltage at

radio terminal 12.

Is the repair complete?

11–14 v

Go to Step 12

Go to Step 13

 

 

 

 

 

 

 

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