1992 MAZDA PROTEGE audio

AUDIO
SYSTEM
RADIO
I
DOOR SPEAKER (RH)
AUDIO
COMPONENT
.
DOOR SPEAKER (LH)
RADIO, CASSETTE TYPE PLAYER
AUDIO DOOR SPEAKER
0-W
COMPONENT
I ’ REAR SPEAKER
W-U
1 Q r SPEAKER
T-91

T AUDIO
TROUBLESHOOTING
Circuit Diagram
l AUDIO SYSTEM J
AUDIO ILLUMINATION LAMP:
REFER TO SECTION I-4
AUDIO SYSTEM
I-01 AUDIO SYSTEM(I) J-02 AUDIO SYSTEM (I)
R/B L/R L/B
-03 DOOR SPEAKGlRL~ J-04 DOOR SPEAK:;R;i J-05 REAR SPEAKER(ky J-06 REAR SPEAKER$
OWOTX-156
T-92

AUDIO
No sound
Replace fuse Va: Battery voltage
Verify that short plug is connected tightly to DIN
connector Connect tightly
I YES
Verify battery voltage at terminals of harness side with
Accp;;;ia, ,:---lb, “‘-k,
I YES
Replace radio
I
23UOTX-064 Sound is partial
1 Table 1
I Speaker Fader Balance
I Speaker
operates
I Judgement
Left rear Rear I Left Yes 1 Left rear speaker OK
No 1 Left rear soeaker circuit faulty (Go to Table 2)
Right rear Rear
I Right Yes Right rear speaker OK
No 1 Riaht rear sneaker circuit fauftv (Go to Table 2)
I
Left door
Right door
Table 2
Rear
Rear Left
Right Yes
No
Yes
No Left door speaker OK
Left door speaker circuit faulty (Go to Table 2)
Right door speaker OK
Right door speaker circuit faulty (Go to Table 2)
I No operation
I Action
I
1 Anv sneaker 1 Insoect the speaker (Refer to page T-99)
I
All speakers Replace the audio component
I
23UOTX.065
T-93

I
AUDIO
Bad sound quallty of radio
I
Is sound quality bad in certai
NO FM multipath interference and excessively strong AM
reception near station may cause bad sound
I
Is tuning OK?
I Normal t
Check for objects lying on speaker and rattling
I Repair speaker
1 OK
Check speakers (Refer to pa Replace speakers
1 OK
Is antenna properly installed?
I Install properly NO
Check antenna (Refer to page T-100) - Replace antenna L I L I OK
Replace audio assembly
23UOTX-066
II Bad sound quality of tape
II
Check with another tape Defective tape Use good tape
1 NG
Check speakers (Refer to page T-99)
I
Check for objects lying on speaker and rattling OK
I
I
Replace audio combination assembly
23UOTX.067
T-94

AUDIO
Noise
1 YES
I
Verify that mounting screws ar Tighten screws
1 YES
Is there still noise when anten
I Replace antenna YES
Is wiring in good condition? Repair wiring
I YES
Verify proper grounding Repair ground
I I YES
Check for outside noise (Refer to page T-96)
23UOTX-066 Scan or turning does not stop
Install properly
inspect antenna (Refer to p
, YES
Replace audio assembly
23UOTX-069
T-95

AUDIO
CAUSES OF NOISE
When the radio receives a signal from a station, there may be some noise interference. The cause could be
1. Defective audio system.
2. The vehicle itself inducts noise (called outside noise).
3. Noise from other cars or neon signs, for example, ambience noise.
Since ambience noise is a temporary occurrence, this section does not deal with it. For noise problems,
first, the cause of the noise must be determined through the troubleshooting guide. Once it has been deter-
mined, refer to the suppression chart to find the proper procedure for eliminating the noise.
FM STATION
93u15x-07 1 03UOTX-187
FM multipath
FM waves can cause a problem called multipath receiving.
This happens when the radio picks up a direct wave and
reflected wave at the same time. This results in a “Dead Spot”
or distorted sound.
Troubleshooting
I I
+
There is still noise
I
Defective audio system
+
Noise eliminated
V
Vehicle itself inducts noise
I
23UOTX-070
T-96

AUDIO T
Noise Suppression Chart
Cause
‘uel pump noise Remedy Move speaker wiring away from fuel pump wire.
REAR HARNESS FUEL
PUMP
Wotor noise
Wiper, washer, power
window, for example) 1. Check grounding.
2. Install condensers to motor circuit.
Turn signal noise Connect condenser (0.5 pF) to power line of filter unit. Note
CONDENSER
4lternator noise
l Condenser should be placed near flasher unit.
Connect condenser (0.5 pF) near alternator.
TO RADIO
CONDENSER
97UOTX-1
T-97

T AUDIO
AUDIO COMPONENT
Removal / Installation
1. Remove in the order shown in the figure.
2. install in the reverse order of removal.
OBUOTX-163
1 .Center panel
T-98
03UOTX-1E
2. Audio component
DOOR SPEAKER
Removal / Installation
1, Remove the door trim. (Refer to Section S.)
2. Remove the door screen.
3. Remove the door speaker.
-’