ASA Electronics MS-407 TROUBLESHOOTING AM/FM RADIOS

TROUBLESHOOTING

Symptom Cause Possible Solution

No Power No 12VDC Check circuit fuse at source

Check in-line fuse on power lead

(wall mount units are located in

rear cabinet)

Power lead disconnected

Ground connection

No 12VDC to memory lead

(electronically tuned units only) Circuit fuse at source

In-line memory lead fuse

Speaker Output shorted Check continuity of speaker

leads to ground

Power indicated; No audio

output

Speaker out cross channeled Check for proper speaker wiring.

Note: Radios have a sticker on

them explaining wiring color

code.