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Circuit
Symptom
General
No sound
AM
No sound, weak sound
(Low sensitivity)
FM
No sound, weak sound
(Low sensitivity)
CD
Cannot read the table of
contents,
no display,
no sound.
TROUBLESHOOTING
•
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 AM antenna coil or oscilloscope coil:
Replace if necessary.
•
Intermediate Frequency tuning faulty:
Readjust (see "Alignment and Adjustment").
•
RF tracking faulty:
Readjust (see "Alignment and Adjustment").
•
Defective TA2111
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 TA2111:
Check voltages. Replace if necessary.
•
Intermediate Frequency tuning faulty:
Readjust (see "Alignment and Adjustment").
•
Poor contact in FM antenna circuit:
Resoled or repair as required.
•
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 Pick-up Head:
Wait about 20 to 30 minutes.
•
Defect in the servo control board:
Replace or repair as required.
•
Defect in the pickup mechanism:
Replace as required.
Cause and Remedy
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