5. TROUBLESHOOTING

WARNING

Do not open the equipment.

Improper handling can result in electrical shock. Only qualified personnel should work inside the equipment.

Do not disassemble or modify the equipment.

Fire, electrical shock or serious injury can result.

5.1 Troubleshooting List

The troubleshooting list below gives common symptoms of equipment malfunction and means to restore normal operation. If you cannot restore normal operation, please do not check inside any unit. Any repair is best left to a qualified radiotelephone technician. Improper handling or adjustment may cause more serious damage.

Table 5-1 Troubleshooting list

Trouble

 

Probable Cause

Remedy

 

 

 

Power cannot be turned

The mains switchboard may be

Turn on the mains switch.

on.

off.

 

 

 

 

DC overvoltage input.

Check supply voltage. It should

 

 

 

be less than 15 V.

 

The battery may have

Recharge battery and tighten

 

discharged, or poor contact at

terminal connections.

 

terminals.

 

 

 

 

 

 

 

Frequency readout appears

The [

/9] key may be off.

Operate the [

/9] key.

but no lamps light.

 

 

 

 

 

 

 

 

 

Power is on but no sound

The [

/4] key is off.

Press the [

/4] key.

from loudspeaker.

Volume may be too low.

Adjust the [VOLUME] control.

 

 

Squelch is on.

Press the [SQL/5] key if "SQ"

 

 

 

appears on the display.

 

Reduced RF Gain.

Turn the [RF GAIN] control

 

 

 

clockwise.

 

 

 

 

 

 

(Continued on next page)

5-1

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Furuno FS-1503 manual Troubleshooting List