Mitsubishi Montero (2004+). Manual - part 553
RADIO WITH TAPE PLAYER AND CD PLAYER
TSB Revision
CHASSIS ELECTRICAL
54A-181
INSPECTION PROCEDURE 16: Distortion on AM and/or FM.
.
DIAGNOSIS
STEP 1. Check the level of distortion.
Q: How much distortion is there?
Occasional distortion :
Go to Step 2.
Constant distortion :
Go to Step 3.
STEP 2. Check the location of the distortion.
Q: Is there distortion when the vehicle is near the
radio station?
YES :
The antenna is receiving too strong a signal.
NO :
Go to Step 3.
STEP 3. Check the wires at each speaker.
Q: Are the speaker wires contacting the paper
speaker cone?
YES :
Move the speaker wires away from the
paper speaker cone. The speaker should
now be free of distortion.
NO :
Go to Step 4.
STEP 4. Remove the speakers, and check the
paper cone for foreign material or damage.
Q: Is there foreign material or damage on the paper
cone of the speaker?
YES :
Repair or replace the speakers. The
speaker should now be free of distortion.
NO :
Go to Step 5.
STEP 5. Check for distortion with the speaker
installed.
Q: Does a distortion occur?
YES :
Install the speaker securely. The speaker
should now be free of distortion.
NO :
Repair or replace the radio and CD player.
The speaker should now be free of
distortion.
INSPECTION PROCEDURE 17: Distortion on FM Only.
DIAGNOSIS
STEP 1. Check that the distortion is present
when the radio is tuned to another station.
Q: Does the distortion persist when the radio is tuned
to another station?
YES :
Go to Step 2.
NO :
The signal from that station is too weak.
STEP 2. Relocate the reception area and check.
Q: When relocating the reception area does the
distortion increase or decrease?
YES :
The cause may be multipath or fading
noise. Multipath noise is the echo that
occurs when the broadcast signal is
reflected by a large obstruction and enters
the receiver with a slight time delay relative
to the direct signal (repetitious buzzing). A
fading or buzzing noise may occur when the
broadcast beam is disrupted by obstructing
objects and the signal strength fluctuates
within a narrow range.
NO :
Repair or replace the radio and CD player.
Check that a distortion is resolved.