Table of Contents
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Circuit
Symptom
General
No sound
AM
No sound, weak sound
(Low sensitivity)
FM
No sound, weak sound
(Low sensitivity)
Tape
No sound/recording,
unsteady tape sound,
weak sound
CD
Cannot read the table of
contents.
no display,
no sound.
RXD-M47WM/LS-M47WM
TROUBLE SHOOTING
•
Speakers are not connected: Check the speaker connection.
•
Wrong function is selected: Set switch to the proper position.
•
Defective volume control:
Set the volume control to a proper sound level.
•
Defective earphone jack: Replace the earphone jack.
Mute function is active: Release it by remote control.
•
•
Improper location of unit: Rotate or reposition the unit.
•
Defect in T203:
Check resistance, voltage, and current. Replace as needed.
•
Defect AM antenna loop or oscilloscope coil:
Replace if necessary.
•
Intermediate Frequency tuning faulty:
Readjust (see "Alignment and Adjustment").
•
RF tracking faulty: Readjust (see "Alignment and Adjustment").
•
Defective U201 (SA2104S):
Check voltages. Replace if necessary.
•
Poor contact in antenna circuit: Check resistance and resolder.
•
FM antenna not connected:
Connect the built-in or external antenna.
•
Defective band selector switch: Replace or repair the switch.
•
Defective U201 (SA2104S):
Check voltages. Replace if necessary.
•
Intermediate Frequency tuning faulty:.
Readjust (see "Alignment and Adjustment").
•
Poor contact in FM antenna circuit:
Resolder or repair as required.
•
Dirty capstan or head: Clean the capstan or head with alcohol.
•
Irregular cassette tape winding: Replace tape.
•
Defective U301 (AN7312)
Check voltages. Replace if necessary.
•
Cassette erasure prevention tabs broken out:
Replace tape or cover tab openings with adhesive tape.
•
Disc is inserted upside down: Insert disc correctly.
•
Disc is dirty: Wipe clean with a soft cloth.
•
Disc is scratched: Use a new disc.
•
Disc is seriously warped: Use a new disc.
•
A non-standard disc has been inserted:
Use only a brand name disc.
•
Moisture has formed inside the CD deck:
Wait about 20 to 30 minutes.
•
Defect in the servo control board:
Replace or repair as required.
•
Defect in the CD pickup mechanism: Replace as required.
Cause and Remedy
11
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