Panasonic EURO7 ch. - no sound.

  • Thread starter rg26ce1991@hotmail.com
  • Start date
R

rg26ce1991@hotmail.com

Guest
Greetings group.

I have a Panasonic TX80P300A, chassis EURO7 on the bench with random
loss of sound.

There is sound from the L and R monitor out sockets.
And from the SUB headphone socket, but not the MAIN headphone socket.

I hope to have a schematic soon.

The cause does not seem to be a dry joint.

Can anyone assist to point me to a known cause for this problem?


Thanks,
Russell Griffiths.
 
The MAIN headphone socket may be damaged?


<rg26ce1991@hotmail.com> wrote in message
news:1109036374.903392.190040@f14g2000cwb.googlegroups.com...
Greetings group.

I have a Panasonic TX80P300A, chassis EURO7 on the bench with random
loss of sound.

There is sound from the L and R monitor out sockets.
And from the SUB headphone socket, but not the MAIN headphone socket.

I hope to have a schematic soon.

The cause does not seem to be a dry joint.

Can anyone assist to point me to a known cause for this problem?


Thanks,
Russell Griffiths.
Click to expand...
 
At the moment, I will consider it a possibility.
I will look into that.

When I first turned the ctv on, there was no sound from the speakers,
several minutes later the sound worked. Then, several minutes later the
sound stopped again.
Thanks,
Russell.
 
Have a similar problem to you, but its on a Sony walkman. They fixed it by
replacing the headphone socket, but it doesnt last long, they found out the
copper track on pcb is "comming out"

Might be a dry joint too.

<rg26ce1991@hotmail.com> wrote in message
news:1109041558.251889.200200@f14g2000cwb.googlegroups.com...
At the moment, I will consider it a possibility.
I will look into that.

When I first turned the ctv on, there was no sound from the speakers,
several minutes later the sound worked. Then, several minutes later the
sound stopped again.
Thanks,
Russell.
Click to expand...
 
On 21 Feb 2005 17:39:34 -0800, "rg26ce1991@hotmail.com"
<rg26ce1991@hotmail.com> wrote:

Greetings group.

I have a Panasonic TX80P300A, chassis EURO7 on the bench with random
loss of sound.

There is sound from the L and R monitor out sockets.
And from the SUB headphone socket, but not the MAIN headphone socket.

I hope to have a schematic soon.

The cause does not seem to be a dry joint.

Can anyone assist to point me to a known cause for this problem?


Thanks,
Russell Griffiths.
Click to expand...

Get hold of Silicon Chip Feb 2005 and read Servicemans's Log starting
p.50 at the para heading "Oh dear, how sad, never mind". This
particular set is described with similar symptoms and it seems that it
is a common problem.
 
Thanks Ross.
I must be getting forgetful. I only read the "serviceman" (S.C. 02/05)
a few weeks ago. I have just reread the story and it does sound
similar.
I will try removing and resoldering the chip.

Bye,
Russell.
 
On 25 Feb 2005 01:13:10 -0800, "rg26ce1991@hotmail.com"
<rg26ce1991@hotmail.com> wrote:

Thanks Ross.
I must be getting forgetful. I only read the "serviceman" (S.C. 02/05)
a few weeks ago. I have just reread the story and it does sound
similar.
I will try removing and resoldering the chip.

Bye,
Russell.
Click to expand...
Removing the IC may prove difficult but what have you got to lose. At
worst you can replace the IC as the serviceman found it necessary to
do.

Ross
 
Good news everone.
Removing and resoldering IC2510 in the module fixed the problem.
Thankyou to Ross who unfortunately has deleted his very useful posting
which
pointed me to S.C. mag (02/05).

And of course, thankyou to the S.C. Serviceman.

Bye,
Russell Griffiths.

rg26ce1991@hotmail.com wrote:
Thanks Ross.
I must be getting forgetful. I only read the "serviceman" (S.C.
02/05)
a few weeks ago. I have just reread the story and it does sound
similar.
I will try removing and resoldering the chip.

Bye,
Russell.
Click to expand...
 
You must log in or register to reply here.

Welcome to EDABoard.com

Sponsor

Back
Top