Troubleshooting

The DX-440 is a ruggedly built elec- tronic unit with all parts conservatively rated. However, you should treat it with care; don'tsubject it to excessively rough handling. You will find it will give you long life enjoyment if kept free from excessive humidity.

If you have problems-(we hope you don't),-checkthe following:

FREQUENCY DISPLAY

No/incorrect display

•Weak microprocessor or radio batteries.

•Microprocessor fails to initialize. This may happen when you first install (or replace) batteries. Remove the micro- processor batteries, wait for about one minute, and re-install.

Display is dim

•Weak microprocessor or radio batteries.

•Environment is inappropriate for operation; temperature is too high or too much humidity.

RADIO

No sound

•Check the VOLUME control setting.

•Headphone jack is plugged in.

•Weak radio batteries.

•AC adapter cord not firmly plugged.

•DC power cord is not correctly in- serted into cigarette lighter socket in vehicle operation.

•AC jack or external DC jack is plugg- ed in when trying to operate on bat- teries.

Weak or intermittent sound

•Weak radio batteries.

•Antenna adjustment insufficient.

•Weak signal. Try moving the unit near a window when operating inside a vehicle or in a metal frame building.

•Tuning slightly off-frequency. Use UP or DOWN key to fine tune.

Frequency cannot be keyed in when direct tuning.

•EXECUTE was not pressed within 5 seconds.

•Microprocessor failed to initialize. Remove the microprocessorbatteries, wait one minute and re-install.

Scanning or memory frequency cannot be keyed in

•EXECUTE was not pressed after the frequency was keyed in.

Will not scan on AM

• Limit frequencies are not keyed in.

Scanning stops where there is no clear signal

·Birdies-the internally generated signals mixed with external signals. A telescopic antenna is likely to pick up these undesirable signals; use an out- door antenna.

A few of the most common birdies are: 455 kHz 3,844 kHz 9,000 kHz 10,245 kHz 18,000 k~z 20,490 kHz

21,835 kHz 21,868 kHz

Scanning does not stop automatically

•Weak signal.

•RF GAIN is not set to MAX

Memorized frequency cannot be recalled

•Wrong band is set. Switch bands.

•Memory has been erased. Re-enter the frequency.

SLEEP does not function

•The SLEEP button is not pressed

•The power switch is set to on

If none of the above suggested remedies solves the problem, return your set to your nearby Radio Shack store for assistance.