JVC UX-M3R Service Manual

UX-M3R
1-19
Trouble shooting
Circuit Symptom Cause
Speakers are not connected.
Wrong function is selected.
Defective volume control
Defective earphone jack
Defect in IC601
Defect in IC301
No soundGeneral
Remedy
Check the speaker connection.
Set switch to the proper position.
Set the volume control to a proper sound
level.
Replace the earphone jack.
Check voltages. Replace if necessary.
Check voltages. Replace if necessary.
Improper location of unit
Defect in IFT101
Defect AM antenna coil or oscilloscope coil
Intermediate frequency tuning faulty
RF tracking faulty
Defective IC101
Defective IC102
Poor contact in antenna circuit
No sound, weak sound
(Low sensitivity)
AM Rotate or resposition the unit.
Check resistance, voltage, and current.
Replace as needed.
Replace if necessary.
Readjust (see "Adjustment method").
Readjust (see "Adjustment method").
Check voltages. Replace if necessary.
Check resistance and resolder.
Check resistance and resolder.
FM antenna not connected
Defective band selector switch
Defective IC101
Defective IC102
Intermediate frequency tuning faulty
Poor contact in FM antenna circuit
No sound, weak sound
(Low sensitivity)
FM Connect the built-in or external antenna.
Replace or repair the switch.
Check voltages. Replace if necessary.
Check voltages. Replace if necessary.
Readjust (see "Adjustment method").
Resolder or repair as required.
Dirty capstan or head
Irregular cassette tape winding
Defective IC202
Cassette erasure prevention tabs broken out
No sound/recording,
unsteady tape sound,
weak sound
Tape Clean the capstan or head with alcohol.
Replace tape.
Check voltages. Replace if necessary.
Replace tape or cover tab openings with
adhesive tape.
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.
Defective IC701
Defective IC704
Defective TA2092N
Defect in the CD pickup mechanism
Cannot read the table
of content.
No sound
CD 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.
Check voltages. Replace if necessary.
Check voltages. Replace if necessary.
Check voltages. Replace if necessary.
Replace as required.

JVC UX-M3R Specifications

Amplifier Specifications

output power	24 W (12 W + 12 W) at 8 Ω (MAX.)
output power at THD	20 W (10 W + 10 W) at 8 Ω (10% THD)
audio output level	800 mV/32 Ω
speakers impedance	8 Ω - 16 Ω

Tuner Specifications

FM tuning range	87.50 MHz - 108.00 MHz
MW tuning range	522 kHz - 1 629 kHz

CD Player Specifications

dynamic range	60 dB
signal-to-noise ratio	60 dB
wow and flutter	Unmeasurable

Cassette Deck Specifications

frequency response for normal tape	100 Hz - 10 000 Hz
wow and flutter	0.35% (WRMS)

General Specifications

power requirement	AC 240 V, 50 Hz
power consumption (operation mode)	30 W
power consumption (standby mode)	1.5 W
dimensions	160 mm × 269.5 mm × 300 mm
mass	4.3 kg

Speaker Specifications

speaker unit (woofer)	10.2 cm cone × 1
speaker unit (tweeter)	5.1 cm cone × 1
impedance	8 Ω
dimensions	160 mm × 269.5 mm × 192 mm
mass	2 kg/each