Saved this nice HITACHI doubledecker from dumping:



Would be a very nice box for cruising



The first look was horrible.
Box full with agressive white powder.
Think it must have been in a battery loading room or so.
Outside and also inside



cleaned everything as good as possible



The problem:

There comes no tone out of this box!
Radio on all wavebands - nope.
Tape (left) works mechanical, right would need new belt - but no tone!
When moving the switches comes some "knack"
Also when pointing with a screwdriver on some components inside, the speakers are humming.
So the amp should be ok, or?
Cleaned every swich and connect with kontaktspray.
Did´nt help.

Also no tone over headphones....

Anybody a idea what i can do, before i trash it away....

Might be a shorted eleKtrolytiK Kapacitor
or loss of voltage somewhere.

No trash it -- you will be banned from this site

or leave it in the laundry room, someone will pick it up.

Will do my best to save it.
Don´t know what this a$$ has done with it.
My fingers are biting from this agressive white power. Baaaah.
But i dont want to do a perfect clean, before i know i can get it working...

Does this boombox have a line-out? Try connecting the line-out to another boombox and see if it will send a good signal to another boombox. If YES, then I suspect bad amp. If no, then maybe the function switch is the problem. Also, maybe there is a voltage issue. A broken power junction to the preamp is worth looking into. So many possible causes, where do I start?

Like Stormin Normin says, as well as checking the switches, why not have a look at the power supply too?

You'll need a multimeter to check to see if there is any voltage across the various reservoir capacitors. I presume the box has a number of different voltage supplies: one for the deck motors, one for the preamp and tuner section perhaps, another one for the power amp(s). You'll need to identify these supplies and check them. If the problem doesn't lie there, you'll need to check further along each of the power supply lines.

Cheers, Jon.