Help on Honda Car Radio repair

I have a car radio/cassette from a 1997 Honda Accord that has an intermintent problem. Model number is CM6704BA, P/N 39100-SV4-A000-M1.

The radio dial always displays and shows chaning frequency for both AM/FM

All speakers dead, most of the time. I have it on the bench and seem if I heat it up with the hair dryer it will begin to produce a sound on speakers like amp is working.

When tapping or twisting stations will begin to come in and Stereo Light on FM will appear.

When it works it works good. Bump or twist the main board stations will disapper and rush sound form speakers remains, or speakers become silent with dial still displaying frequency, but no stereo light..

I have cleaned all sockets with DeOxit.

If I remove the cassette deck to trouble shoot componets beneath the deck, the display shows tape. I do not know what to jump to simulate the cassette deck being installed.

Does anyone have a Service Manual?

I think it could be in the area of the crystal or the large intergrated circuit. But it has been hard to determine what part of the part the connection is bad or flaky component is located.

I sure could use some help. I have doing electronic repair since the late

50's and have plenty test gear, scopes and sig generators.

73

Dave K0RWM

Reply to
D Messing
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The symptoms point to a bad solder joint (but you already knew that). See if you can locate a point that is sensitive to tapping or pressure. The legs of power transistors or other components mounted on heat sinks are also suspect.

PlainBill

Reply to
PlainBill

You can probably home in, by tapping, on the several square centimetres of the PCB that has the dry joint or bad connector.

All you then need do is to resolder every joint in that area, it will probably take no longer than 5 minutes.

I often use this technique to at the very least eliminate a dry joint as a suspect. It is amazing how little time it takes to resolder a complete PCB, compared with the time it takes to actually find the one dry joint.

Gareth.

Reply to
Gareth Magennis

Better yet, why even f*ck around with it? Why not just spend about $300 at Crutchfield and get an Alpine that will play modern formats? Or if you really want to listen to shitty cassettes on a shitty Honda stereo, then I'm sure that junkyards and thrift stores and filled up to the hilt with them, but always start by looking no further than your nearest dumpster.

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Fat Baby Killing Whore

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