Help on Honda Car Radio repair

D

D Messing

Guest
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
 
On Sat, 17 Nov 2012 11:16:54 -0600, "D Messing"
<davidjmessing@gmail.com> wrote:

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

Use www.elektrotanya.com when searching for schematics.
Click to expand...

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
 
"D Messing" <davidjmessing@gmail.com> wrote in message
news:1a6e4$50a7c675$adbeae43$13669@ALLTEL.NET...
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
Click to expand...

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.
 
On 11/17/12 17:16, D Messing wrote:
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
Click to expand...
Better yet, why even fuck 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.
 
On Thu, 22 Nov 2012 00:59:59 +0000, Fat Baby Killing Whore wrote:
Better yet, why even fuck 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.
Click to expand...
I wonder what a sewer-mouthed thug
like you is doing in a "repair" ng?
 
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