I owe an old radio BLAUPUNKT DERBY DELUXE US 7 659 704 bought back new in the early 60's and I have some problem with the sound switch - read ATENUATOR. Would you know if this part is still available and where?
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Is it an loud sharp sound which varies according to your speed? May be a power problem - crossing lines. Take it by an auto stereo shop and ask the installer. Make sure they sell your brand. Someone would have to hear the sound in order to fix the problem. Hope this helps!
Remove the secuirty panel from the front o f the unit.
with a small fine flat bladed screwdriver remove the two facia strips - one either side, CAREFULLY! they are on clips.
You should find four 10mm bolts holding the whole frame in, remove these and you may need to fit a subframe to re-fit your new unit.
Fit your new unit or frame into place, replace the bolts - don't over tightem them - and the trim.
Fit your new unit - Happy motoring!
Have you tried opening up the radio and spraying contact cleaner into the volume potentiometer? This is a common problem in older electronics. The RF 888 has 4 screws on the back. Remove those and you can lift off the back cover. (Be careful because those screws pass through the center of the radio and hold the front cover in place.)
Get some electronic cleaner at Radio Shack and spray it into the small opening on the side of the volume control. Rotate the volume several times and let the spray evaporate and see if things sound better.
Consult your wiring diagram on the radio and make those required connections. If you want to retain your original factory radio connector, make a "Y" for each lead and insulate all as needed...accordianman