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Pioneer sx 737

Is it a big job to replace lamps in this unit.  Right now the fm stereo lamp is out and the meters are slightly dimmer than the rest of the unit.  I would like to get them all replaced.  If I was to take it to a tech what migt I expect to pay for this service or could I do it myself.  Myself being a maint tech for a cable Co for 27 yrs. Thankyou

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SOURCE: SX-950 Stereo Pioneer Receiver

The relay is a protection device for the speakers. It will shut off the speakers when problems are detected internally. I would suspect that some of the capacitors in the front end are in need of replacing. This is a common item for units this old. I have restored a number of these for customers over the years with much success. Figure about $15-$20 in parts for this repair plus the local labor rate. This unit is definately worth a refurb. What happens is that there is dsome DC voltage being leaked into the final amplification stage. This triggers the protection circuit to shut off the speakers. DC voltage on a speaker will heat up the coil and eventually destroy the speaker.

Posted on Apr 02, 2008

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SOURCE: I just bought an old

Any luck with checking antenna connections? I have a service manual if you need it. Tuner section in this old girl predates the LM7001. Uses ha1137-38 chips, bit more complex to repair.

Posted on Jun 09, 2008

  • 4 Answers

SOURCE: Pioneer SX-737

You might try to get some information from: Somebody will need it if you want it worked on. If it is real heavy (40lb.s +) it may well be from the 70's. Mostly good units. I wouldn't give you $0.10 for their new stuff.

Posted on Nov 05, 2008

  • 2 Answers

SOURCE: Pioneer SX-750 Old School Need Help

Check the speaker wire. Sometimes it can just be loose in the terminals and cause distortion. I have had the problem before.


Posted on Jan 12, 2009

  • 1 Answer

SOURCE: Hi, Experts, Vintage Sansui 5050 receiver.

Check for 19 Kz on stero decoder that requires calibration adjustment.
Instrument you need:
Occiloscope or frequezy counter and adj driver .
Good lock.

Posted on Jul 28, 2009

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