Trouble Shooting - JVC RC-BM5 Service Manual

Trouble shooting

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
CD-R of content.
CD-RW No display, no sound
MP3-CD
Cause
The unit is on STANDBY mode.
Defective volume control
The unit is on MUTE mode.
Adjust the set position for the best reception.
AM VT faulty
Intermediate frequency tuning faulty
RF tracking faulty
Defective IC101
Adjust FM antenna position for the best
reception.
Defective IC101
Intermediate frequency tuning faulty
Dirty capstan or head
Irregular cassette tape winding
Defective IC202
Cassette erasure prevention tabs broken out
Disc is inserted upside down.
Disc is dirty.
Disc is scratched.
Disc is seriously warped.
A non-standard disc has been inserted.
Moisture has formed inside the CD deck.
Defect in the servo control board
Defect in the CD pickup mechanism
MP3 formats not supported.
Remedy
Press STANDBY/ON button to turn on the
unit.
Set the volume control to a proper sound
level.
Press MUTE on the remote control.
Readjust (see "Adjustment method").
Readjust (see "Adjustment method").
Readjust (see "Adjustment method").
Check voltages. Replace if necessary.
Check voltages. Replace if necessary.
Readjust (see "Adjustment method").
Clean the capstan or head with alcohol.
Replace tape.
Check voltages. Replace if necessary.
Replace tape or cover tab openings with
adhesive tape.
Insert disc correctly.
Wipe clean with a soft cloth.
Use a new disc.
Use a new disc.
Use only a brand name disc.
Wait about 20 to 30 minutes.
Replace or repair as required.
Replace as required.
Use MP3-CD formats supported on this
unit
RC-BM5
1-19