Troubleshooting

If you are having a problem with your unit, check this list for a possible solution before calling for service.

If you cannot solve the problem from the hints given here, or the unit has been physically damaged, call a qualified person, such as your dealer, for service.

Symptom

No sound is heard.

Unable to record on an MD.

Poor radio reception.

Unable to operate the remote control.

Loaded CD and MD can not be ejected.

The CD does not play.

The CD skips.

Operations are disabled.

Possible Cause

Connections are incorrect or loose.

You are using a prerecorded MD.

The MD is write-protected.

The antenna is not connected correctly.

The AM loop antenna is too close to the unit.

The FM antenna is not properly extended and positioned.

The path between the remote control and the remote sensor on the unit is blocked.

The batteries have lost their charge.

You are using the remote control far from the main unit.

The main AC power cord is not plugged in.

The CD is upside down.

The CD is dirty or scratched.

The built-in microprocessor has malfunctioned due to external electrical interference.

Action

Check all connections and make corrections. (See pages 6 – 9.)

Change it with a recordable MD.

Unprotect the MD. (See page 29.)

Reconnect the antenna securely.

Change the position and direction of the AM loop antenna.

Extend FM antenna to the best reception position.

Remove the obstruction.

Replace the batteries. (See page 9.)

Signals cannot reach the remote sensor. Move close to the main unit.

Plug in the AC power plug.

Put the CD in with the label side up.

Clean or replace the CD. (See page 46.)

Unplug the unit then plug it back in.

Specifications

US and foreign patents licensed from Dolby Laboratories Licensing Corporation.

Amplifier

Output Power (IEC 268-3/DIN):

44 W (22 W + 22 W) at 4 Ω (MAX.)

40 W (20 W + 20 W) at 4 Ω (10 % THD)

Audio input sensitivity/Impedance (at 1 kHz)

LINE IN:

400 mV/48 kΩ

Audio output level/Impedance (at 1 kHz) LINE OUT: 260 mV/5.8 kΩ

Speaker Terminals: 4 Ω – 16Ω

Tuner

FM tuning range:87.50 MHz — 108.00 MHz AM (MW/LW) tuning range:

MW:

522 kHz — 1 629 kHz

LW:

144 kHz — 288 kHz

CD player

CD Capacity:

1 CD

Dynamic range:

85 dB

Signal-to-noise ratio:

90 dB

Wow and flutter:

Immeasurable

Sampling frequency:

44.1 kHz

Audio compression system:

ATRAC (Adaptive TRansform Acoustic

Coding)/ATRAC3 ( )

Speaker Section

Speakers:

Woofer 10 cm, Tweeter 4 cm

Impedance:

4 Ω

Dimensions (approx.):

130 mm x 215 mm x 231.5 mm (W/H/D) (51/8 in. x 81/2 in. x 91/8 in.)

Mass (approx.): 2.0 kg (4.5 lbs)

General

Power requirement:

AC 230V , 50 Hz

Power consumption:

50 W (at operation)

 

3.9 W (on standby)

Dimensions (approx.):

431 mm x 217 mm x 330 mm (W/H/D) (17 in. x 89/16 in. x 13 in.)

Mass (approx.): 8.5 kg (18.8 lbs)

MD recorder

Audio playing system:

MiniDisc digital audio system

Recording system:

Magneto-optical overwrite system

Reading system:

Non-contact, semiconductor laser

 

pickup (λ=780 nm)

Error correction system:

CIRC (Cross Interleave Reed-Solomon

 

Code)

Recording/Playback time (when using a 80-minute MD )

SP:

80 minutes

LP2:

160 minutes

LP4:

320 minutes

Supplied accessories

See page 6.

Design and specifications are subject to change without notice.

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JVC UX-A70MDR manual Troubleshooting, Specifications