JVC UX-H300, Руководство по обслуживанию

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(No.MB215)1-21
SECTION 5
TROUBLESHOOTING
Circuit Symptom Cause and Remedy
Defective earphone jack:
Replace the earphone jack.
Defect in IC801
Check voltages. Replace if necessary.
Defect in IC301
Check voltages. Replace if necessary.
AM
General
No sound,weak sound
(Low sensitivity)
No sound
Defect in IF T103:
Check resistance, voltage, and current. Replace as needed.
Defect AM antenna coil T101 or oscilloscope coil T102:
Replace if necessary.
Intermediate Frequency tuning faulty:
Readjust (see "Alignment and Adjustment").
RF tracking faulty:
Readjust (see "Alignment and Adjustment").
Defective IC101:
Check voltages. Replace if necessary.
Defective IC102:
Check voltages. Replace if necessary.
Poor contact in antenna circuit:
Check resistance and resolder.
FM No sound, weak sound
(Low sensitivity)
No sound/recording,
unsteady tape sound,
weak sound
Defective band selector switch:
Replace or repair the switch.
Defective IC101:
Check voltages. Replace if necessary.
Defective IC102:
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.
Tape Dirty capstan or head:
Clean the capstan or head with alcohol.
Irregular cassette tape winding:
Replace tape.
Defective IC201:
Check voltage. Replace if necessary.
Cassette erasure prevention tabs broken out:
Replace tape or cover tab openings with adhesive tape.
CD Cannot read the table of
content.
no sound Disc is dirty:
Wipe clean with a soft cloth.
Disc is seriously warped:
Use a new disc.
Moisture has formed inside the CD deck:
Wait about 20 to 30 minutes.
Defective IC601:
Check voltages. Replace if necessary.
Defective IC602:
Check voltages. Replace if necessary.
Defective IC603:
Check voltages. Replace if necessary.
Defective IC604:
Check voltages. Replace if necessary.
Defective IC606:
Check voltages. Replace if necessary.
Defective IC607:
Check voltages. Replace if necessary.
Defective IC608:
Check voltages. Replace if necessary.
Defective IC609:
Check voltages. Replace if necessary.
Defect in the CD pickup mechanism:
Replace as required.
www.freeservicemanuals.info 13/10/2016
Published in Heiloo Holland