panasonic cordless phone

[Joe Irvine]

Hi All,
I have a Panasonic cordless phone in for repair with the following
fault.
The unit is about 2 years old and has a digital answering machine.
The problem is at switch on it displays E2 on the display for about a minute
and then goes to the normal screen.
The handset will not talk to the base unit at all.I have tried the handset
on another base and it is ok so the fault must be in the base.
You can do stuff all with the base and cannot record message.
Has anyone seen this before.
Cheers
Joe

 

[Chris Prestwich]

The model of the phones would help.

Hi All,
I have a Panasonic cordless phone in for repair with the following
fault.

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Regards, Chris
[spamblock used]

 

[Rheilly Phoull]

You could try
ftp://ftp.qrz.ru/pub/hamradio/schemes/phone/panasonic/
Read the text file 'readme.txt' to get an idea of the model to file name
situation. I.e for the KX-T4046AL which is common in Oz the file is 408.zip

 

[alex]

The symptoms were such that the handset would work fine first time off the
base unit, and would continue to work for multiple calls, provided it
wasn't returned to the base. If the handset was returned to the base, it
would no longer function until it was left for a period of time (which
appeared to relate to a charge period). It would then be useable again.

the handset is coded each time it is placed on the base unit, by the 3rd
charge contact, stick ur CRO on there and you'll see the coding pulse.
The TCM418's had many problems with the handset and base contacts.
If u look at them closely and see a little black dot on either of them, its
enough to cause
problems.

In both cases the rechargeable battery had been replaced, but this didn't
fix the problem. The base unit appeared to be correctly charging the
handset (via a pulsed voltage) and the battery voltage was good. I'm
unsure if the handset or base is at fault. Your observation would suggest
the base.

There is also a smc cap that goes bad in the base unit.
If u stick ur CRO on the third charge contact (coding contact)
and see that the coding pulse is all modulated garbage, then
I can guaruntee that this is the problem. I've repaired
hundreds of these all with the same fault. Unfortunately I have left
the service trade and cant recall which cap it is. sorry.

 

[Joe Irvine]

Thanks guys for all your help.
Wax, that is a common problem with this model.
Replace the three electrolytics in the base unit power supply near the main
switching transistor and this will cure your problem.
Let me know how you go.
Cheers
Joe

 

[jrobbo]

I've got a different panasonic cordless phone, a KXTG2570, and it has
also been giving me an "out of range" error on the handset for the
last few days, even when it is right next to the base station.

It was working fine, then the suddenly, it has started with this
error, and I can't get it to work at all. The base station works fine.
I've tried cleaning the contacts on the base and on the handset, but
it made no difference.

Any sugestions?

Many thanks in advance

Regards

John

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[Chris Prestwich]

I've got a different panasonic cordless phone, a KXTG2570, and it has

also been giving me an "out of range" error on the handset for the
last few days, even when it is right next to the base station.

Mine did this too, same model. $70 repair and so I'm informed, a
common fault, and mine was just out of warranty too.

I tried two of the newer model and took both back faulty for a refund.

btw, the repairer gave a 1 month warranty on the repair, I complained
until they made it 3 month, wow!

It is now the last Panasonic item I'll buy.

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Regards, Chris
[spamblock used]