Mitsubishi Pajero Pinin. Manual - part 333

 

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Mitsubishi Pajero Pinin. Manual - part 333

 

 

CHASSIS ELECTRICAL – 

Radio and Tape Player

54A-48

RADIO AND TAPE PLAYER

TROUBLESHOOTING

QUICK-REFERENCE TROUBLESHOOTING CHART

Items

Problem symptom

Relevant chart

Noise

Noise appears at certain places when travelling.

A-1

Mixed with noise, only at night.

A-2

Broadcasts can be heard but FM/MW/LW has a lot of noise.

A-3

There is noise when starting the engine.

A-4

Some noise appears when there is vibration or shocks during
travelling.

A-5

Ever-present noise.

A-6

Radio

When switch is set to ON, no power is available.

B-1

No sound from one speaker.

B-2

There is noise but no reception for FM/MW/LW or no sound from
FM/MW/LW

B-3

Insufficient sensitivity.

B-4

Distortion on FM/MW/LW.

B-5

Too few automatic select stations.

B-6

Insufficient memory (preset stations are erased).

B-7

Tape player

Cassette tape will not be inserted.

C-1

No sound.

C-2

No sound from one speaker.

C-3

Sound quality is poor, or sound is weak.

C-4

Cassette tape will not be ejected.

C-5

Uneven revolution. Tape speed is fast or slow.

C-6

Faulty auto reverse.

C-7

Tape gets caught in mechanism.

C-8

CHASSIS ELECTRICAL – 

Radio and Tape Player

54A-49

CHART

A. NOISE

A-1  Noise appears at certain places when travelling.

Is there a particular structure?

No

Do the following measures eliminate
the noise?

1. Change to a different station with

a strong signal to boost resistance
to interference.

2. Suppress high tones to reduce

noise.

3. Extend antenna completely.

Yes

OK

Yes

Find out the following information from
the user:

1. Place
2. Locality conditions (valley, moun-

tain, etc.)

3. Name and frequency of stations

affected by noise

No

If due to vehicle noise:

It may not be possible to prevent noise
if the signal is weak.

If there is more noise than other radios, find out the noise
conditions and the name and frequency of the receiving
stations from the user, and consult with the service centre.

If due to external noise:

In almost all cases, prevention on the
receiver side is impossible. Weak sig-
nals especially are susceptible to inter-
ference.

CHASSIS ELECTRICAL – 

Radio and Tape Player

54A-50

A-2  Mixed with noise, only at night.

The following factors can be considered as possible
causes of noise appearing at night.
1.

Factors due to signal conditions: Due to the
fact that long-distance signals are more easily
received at night, even stations that are received
without problem during the day may experience
interference in a general worsening of reception
conditions. The weaker a station is the more
susceptible it is to interference, and a change

to a different station or the appearance of a
beating sound* may occur.
Beat sound*: Two signals close in frequency
interfere with each other, creating a repetitious
high-pitched sound. This sound is generated
not only by sound signals but by electrical waves
as well.

2.

Factors due to vehicle noise: Alternator noise
may be a cause.

Is the noise still obvious even with the
lamps OFF?

No

Yes

Do the following measures eliminate
the noise?

D

Tune to a station with a strong
signal.

D

Tune to a station with a strong signal
without completely extending the
antenna.

Yes

OK

No

Does the noise fade away when the
vehicle harness is moved away from
the radio chassis? (if the harness is
not in the proper position.)

Yes

OK

No

If there is more noise than other radios, consult a service
centre.

CHASSIS ELECTRICAL – 

Radio and Tape Player

54A-51

A-3  Broadcasts can be heard but FM/MW/LW has a lot of noise.

(1)

(2)

Noise occurs when the engine is stopped.

Yes

Do the following measures eliminate the noise?

D

Tune to a station with a strong signal.

D

Extend the antenna completely.

D

Adjust the sound quality to suppress high tones.

Yes

OK

No

Is the radio body earth mounted securely?

No

Securely tighten the nuts for the body
earth.

Yes

Is the antenna plug properly connected to the radio?

No

Correctly attach the antenna plug.

Yes

Is the antenna itself in good condition or is it properly
mounted?

No

Clean the antenna plug and earth wire
mounting area. Mount the antenna se-
curely.

Yes

If there is more noise than other radios, consult a service
centre.

Is the noise eliminated?

No

Yes

OK

Noise occurs when the engine in running.

Inspect the vehicle’s noise suppressor. (Refer to A-4.)

 

 

 

 

 

 

 

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