Daewoo DS608P - is fault due to C101 cap??

I already have a working DS608P which is a good performer. I also find
the RF modulator useful for use with small portables etc.

I recently bought 2 DS608P's (although one is the Labgear version) at
a car boot. There were no remotes (but I already have one) but I
though I would take a chance. Looking back, I should have guessed they
were all duff sets

Having searched the internet , it looks like the most common fault is
C101 , a 22uF 400v cap in the PSU.

The "Labgear" is completely dead and there is a buzz - I presume this
is coming from the switch mode PSU - so I guess the fault is indeed
C101.

The Daewoo DS608P powers up OK (red/green led) and I get the "Menu"
screen BUT it is in Black & White (NOT colour) and no signals are
detected. Is this fault also likely to be a duff C101 - maybe the
voltage from the PSU is low?? Or is the tuner front end duff?

I have tried resetting the DS608P using the red button but no luck.

I have not tried this yet, but one thought I had was maybe the
engineering menu had been "tweaked" perhaps in a misguided attempt to
find a solution for the "green screen" problem. However , I would have
thought that the "reset" proceedure would reset everything back to the
factory default values (but maybe not the engineering values??).

Any other thoughts as to why the DS608P is in B&W and no signals are
detected?

Thanks

wrote in message
ups.com...
I already have a working DS608P which is a good performer. I also find
the RF modulator useful for use with small portables etc.

I recently bought 2 DS608P's (although one is the Labgear version) at
a car boot. There were no remotes (but I already have one) but I
though I would take a chance. Looking back, I should have guessed they
were all duff sets


Is it really worth bothering with obsolete SetPal boxes when you can get
something just as good for under 30 pounds at Asda or Tesco?
Regards Mike.

wrote:
I already have a working DS608P which is a good performer. I also find
the RF modulator useful for use with small portables etc.

I recently bought 2 DS608P's (although one is the Labgear version) at
a car boot. There were no remotes (but I already have one) but I
though I would take a chance. Looking back, I should have guessed they
were all duff sets

Having searched the internet , it looks like the most common fault is
C101 , a 22uF 400v cap in the PSU.

The "Labgear" is completely dead and there is a buzz - I presume this
is coming from the switch mode PSU - so I guess the fault is indeed
C101.

The Daewoo DS608P powers up OK (red/green led) and I get the "Menu"
screen BUT it is in Black & White (NOT colour) and no signals are
detected. Is this fault also likely to be a duff C101 - maybe the
voltage from the PSU is low?? Or is the tuner front end duff?

I have tried resetting the DS608P using the red button but no luck.

I have not tried this yet, but one thought I had was maybe the
engineering menu had been "tweaked" perhaps in a misguided attempt to
find a solution for the "green screen" problem. However , I would have
thought that the "reset" proceedure would reset everything back to the
factory default values (but maybe not the engineering values??).

Any other thoughts as to why the DS608P is in B&W and no signals are
detected?

Thanks

Not tuned in properly on the TV Tuner? If you are NOT using the RF
connection
then it's something in or around the xtal in the Daewoo box. Sort the PSU
volts
however.


--
--
Graham W http://www.gcw.org.uk/ XP1800+ Page added, Graphics Tutorial
WIMBORNE http://www.wessex-astro.org.uk/ Wessex Astro Society's Website
Dorset UK Info, Meeting Dates, Sites & Maps

As a fellow "G8/GW8" radio amateur , you should know its the challenge
of fixing a duff set bought for a few bob

Also , most of the modern Freeview boxes don't have an RF modulator.

73



On 1 Aug, 19:57, "Mike GW8IJT" wrote:
wrote in message

ups.com...I already have a working DS608P which is a good performer. I also find
the RF modulator useful for use with small portables etc.

I recently bought 2 DS608P's (although one is the Labgear version) at
a car boot. There were no remotes (but I already have one) but I
though I would take a chance. Looking back, I should have guessed they
were all duff sets

Is it really worth bothering with obsolete SetPal boxes when you can get
something just as good for under 30 pounds at Asda or Tesco?
Regards Mike.

wrote in message
ups.com...
I already have a working DS608P which is a good performer. I also find
the RF modulator useful for use with small portables etc.

I recently bought 2 DS608P's (although one is the Labgear version) at
a car boot. There were no remotes (but I already have one) but I
though I would take a chance. Looking back, I should have guessed they
were all duff sets

Having searched the internet , it looks like the most common fault is
C101 , a 22uF 400v cap in the PSU.

The "Labgear" is completely dead and there is a buzz - I presume this
is coming from the switch mode PSU - so I guess the fault is indeed
C101.

The Daewoo DS608P powers up OK (red/green led) and I get the "Menu"
screen BUT it is in Black & White (NOT colour) and no signals are
detected. Is this fault also likely to be a duff C101 - maybe the
voltage from the PSU is low?? Or is the tuner front end duff?

I have tried resetting the DS608P using the red button but no luck.

I have not tried this yet, but one thought I had was maybe the
engineering menu had been "tweaked" perhaps in a misguided attempt to
find a solution for the "green screen" problem. However , I would have
thought that the "reset" proceedure would reset everything back to the
factory default values (but maybe not the engineering values??).

Any other thoughts as to why the DS608P is in B&W and no signals are
detected?


C101 usually cures 99 per cent of power supply related faults, especially if
the capacitor has a silver label on its side.

However I've got several duff tuner boards with similar symptoms to the
second receiver, all of them went down during a thunderstorm, which appears
to be sufficient to cause failure without involving any kind of direct hit.

BTW way can you change the power supply board from the dead receiver with
the one from no signals and see what happens?

Although having said that it's more than a possibility that you may have
purchased them from someone in the trade with a workshop full of
unrepairable bits and pieces, who has decided to try and make a few pounds
at a car boot sale, so I wouldn't be holding my breath that you'll be lucky
enough to make one good one out of the two.



Thanks

Graham W - TV is correctly tuned. I am using a simple portable with
manual tuning.

Ivan - thanks. I'd thought about swapping boards. You are also correct
about somebody clearing out a workshop full of duff Freeview boxes!!
Although maybe they did not realise that the Daewoo and Labgear are
identical!! Does a power supply fault usually mean that the box is
completely dead - so if the LED's light up its not C101?

Thanks


On 1 Aug, 21:22, "Ivan" wrote:
wrote in message

ups.com...





I already have a working DS608P which is a good performer. I also find
the RF modulator useful for use with small portables etc.

I recently bought 2 DS608P's (although one is the Labgear version) at
a car boot. There were no remotes (but I already have one) but I
though I would take a chance. Looking back, I should have guessed they
were all duff sets

Having searched the internet , it looks like the most common fault is
C101 , a 22uF 400v cap in the PSU.

The "Labgear" is completely dead and there is a buzz - I presume this
is coming from the switch mode PSU - so I guess the fault is indeed
C101.

The Daewoo DS608P powers up OK (red/green led) and I get the "Menu"
screen BUT it is in Black & White (NOT colour) and no signals are
detected. Is this fault also likely to be a duff C101 - maybe the
voltage from the PSU is low?? Or is the tuner front end duff?

I have tried resetting the DS608P using the red button but no luck.

I have not tried this yet, but one thought I had was maybe the
engineering menu had been "tweaked" perhaps in a misguided attempt to
find a solution for the "green screen" problem. However , I would have
thought that the "reset" proceedure would reset everything back to the
factory default values (but maybe not the engineering values??).

Any other thoughts as to why the DS608P is in B&W and no signals are
detected?

C101 usually cures 99 per cent of power supply related faults, especially if
the capacitor has a silver label on its side.

However I've got several duff tuner boards with similar symptoms to the
second receiver, all of them went down during a thunderstorm, which appears
to be sufficient to cause failure without involving any kind of direct hit.

BTW way can you change the power supply board from the dead receiver with
the one from no signals and see what happens?







Although having said that it's more than a possibility that you may have
purchased them from someone in the trade with a workshop full of
unrepairable bits and pieces, who has decided to try and make a few pounds
at a car boot sale, so I wouldn't be holding my breath that you'll be lucky
enough to make one good one out of the two.



Thanks- Hide quoted text -

- Show quoted text -- Hide quoted text -

- Show quoted text -

wrote in message
ups.com...
Graham W - TV is correctly tuned. I am using a simple portable with
manual tuning.

Ivan - thanks. I'd thought about swapping boards. You are also correct
about somebody clearing out a workshop full of duff Freeview boxes!!
Although maybe they did not realise that the and Labgear are
identical!! Does a power supply fault usually mean that the box is
completely dead - so if the LED's light up its not C101?


It can be the cause of a variety of strange faults, including being
completely dead, and if it's got the silver sticker on the side then it
should be replaced as a matter of course.
I would be surprised if anyone in the trade didn't realise that the Daewoo
and the Labgear weren't identical receivers, and because the whole thing
comprises of three separate boards which can easily be replaced in a few
minutes, I would also be very surprised if this hadn't already been
attempted, although as long as you know exactly what you're doing it's bound
to be worth a try.



Thanks


On 1 Aug, 21:22, "Ivan" wrote:
wrote in message

ups.com...





I already have a working DS608P which is a good performer. I also find
the RF modulator useful for use with small portables etc.

I recently bought 2 DS608P's (although one is the Labgear version) at
a car boot. There were no remotes (but I already have one) but I
though I would take a chance. Looking back, I should have guessed they
were all duff sets

Having searched the internet , it looks like the most common fault is
C101 , a 22uF 400v cap in the PSU.

The "Labgear" is completely dead and there is a buzz - I presume this
is coming from the switch mode PSU - so I guess the fault is indeed
C101.

The Daewoo DS608P powers up OK (red/green led) and I get the "Menu"
screen BUT it is in Black & White (NOT colour) and no signals are
detected. Is this fault also likely to be a duff C101 - maybe the
voltage from the PSU is low?? Or is the tuner front end duff?

I have tried resetting the DS608P using the red button but no luck.

I have not tried this yet, but one thought I had was maybe the
engineering menu had been "tweaked" perhaps in a misguided attempt to
find a solution for the "green screen" problem. However , I would have
thought that the "reset" proceedure would reset everything back to the
factory default values (but maybe not the engineering values??).

Any other thoughts as to why the DS608P is in B&W and no signals are
detected?

C101 usually cures 99 per cent of power supply related faults, especially
if
the capacitor has a silver label on its side.

However I've got several duff tuner boards with similar symptoms to the
second receiver, all of them went down during a thunderstorm, which
appears
to be sufficient to cause failure without involving any kind of direct
hit.

BTW way can you change the power supply board from the dead receiver with
the one from no signals and see what happens?







Although having said that it's more than a possibility that you may have
purchased them from someone in the trade with a workshop full of
unrepairable bits and pieces, who has decided to try and make a few
pounds
at a car boot sale, so I wouldn't be holding my breath that you'll be
lucky
enough to make one good one out of the two.



Thanks- Hide quoted text -

- Show quoted text -- Hide quoted text -

- Show quoted text -

Thanks Ivan

I've had a quick look at the Labgear PSU - there is no leakage around
the cap. There is also no silver sticker. However , the "top" of the
cap is very "dome" shaped rather than flat. Is this an indication of a
duff C101?

Cheers


On 1 Aug, 22:25, "Ivan" wrote:
wrote in message

ups.com...

Graham W - TV is correctly tuned. I am using a simple portable with
manual tuning.

Ivan - thanks. I'd thought about swapping boards. You are also correct
about somebody clearing out a workshop full of duff Freeview boxes!!
Although maybe they did not realise that the and Labgear are
identical!! Does a power supply fault usually mean that the box is
completely dead - so if the LED's light up its not C101?

It can be the cause of a variety of strange faults, including being
completely dead, and if it's got the silver sticker on the side then it
should be replaced as a matter of course.
I would be surprised if anyone in the trade didn't realise that the Daewoo
and the Labgear weren't identical receivers, and because the whole thing
comprises of three separate boards which can easily be replaced in a few
minutes, I would also be very surprised if this hadn't already been
attempted, although as long as you know exactly what you're doing it's bound
to be worth a try.



Thanks

On 1 Aug, 21:22, "Ivan" wrote:
wrote in message

roups.com...

I already have a working DS608P which is a good performer. I also find
the RF modulator useful for use with small portables etc.

I recently bought 2 DS608P's (although one is the Labgear version) at
a car boot. There were no remotes (but I already have one) but I
though I would take a chance. Looking back, I should have guessed they
were all duff sets

Having searched the internet , it looks like the most common fault is
C101 , a 22uF 400v cap in the PSU.

The "Labgear" is completely dead and there is a buzz - I presume this
is coming from the switch mode PSU - so I guess the fault is indeed
C101.

The Daewoo DS608P powers up OK (red/green led) and I get the "Menu"
screen BUT it is in Black & White (NOT colour) and no signals are
detected. Is this fault also likely to be a duff C101 - maybe the
voltage from the PSU is low?? Or is the tuner front end duff?

I have tried resetting the DS608P using the red button but no luck.

I have not tried this yet, but one thought I had was maybe the
engineering menu had been "tweaked" perhaps in a misguided attempt to
find a solution for the "green screen" problem. However , I would have
thought that the "reset" proceedure would reset everything back to the
factory default values (but maybe not the engineering values??).

Any other thoughts as to why the DS608P is in B&W and no signals are
detected?

C101 usually cures 99 per cent of power supply related faults, especially
if
the capacitor has a silver label on its side.

However I've got several duff tuner boards with similar symptoms to the
second receiver, all of them went down during a thunderstorm, which
appears
to be sufficient to cause failure without involving any kind of direct
hit.

BTW way can you change the power supply board from the dead receiver with
the one from no signals and see what happens?

Although having said that it's more than a possibility that you may have
purchased them from someone in the trade with a workshop full of
unrepairable bits and pieces, who has decided to try and make a few
pounds
at a car boot sale, so I wouldn't be holding my breath that you'll be
lucky
enough to make one good one out of the two.

Thanks- Hide quoted text -

- Show quoted text -- Hide quoted text -

- Show quoted text -- Hide quoted text -

- Show quoted text -

On Wed, 01 Aug 2007 18:09:35 -0700,
wrote:

However , the "top" of the cap is very "dome" shaped rather than flat. Is
this an indication of a duff C101?

It certainly is.

Alan - thanks for info. I am using the RF modulator and a manual TV -
its just a B&W "menu" screen and no signal detected when scans.

I have now looked inside both the Daewoo and Labgear.

Daewoo (powers up OK with red/green LED /no signal found/B&W output) :
Cap C101 has a "flat" top BUT IC101 which is near C101 has a brown
colouration on the PCB surrounding all 8 pins (its a 5H02659R). I
think this might be due to excess heat - but could just be normal?
Also, the green base on the "middle" PCB appears very dull and patchy
- looks a bit like water damage? There is also some light rusting
around the tuner screening and the back of the coax sockets. Maybe the
Daewoo was stored in a damp environment?

Assuming the brown colouration around IC101 is OK , then hopefully the
PSU is OK

Labgear (completely dead) : as already mentioned , cap C101 has a
"domed" top so must be duff!! IC101 is different from the Daewoo - its
a 4 pin 5L0265R mounted vertical to the board (like a voltage reg).
There is some very light brown colouration around the PCB holes but
you have to look carefully - nothing like the Daewoo where the brown
marking spreads all around IC101 - although the body of the Labgear
IC101 is raised on its legs above the PCB whereas the Daewoo IC101 is
resting on the PCB.

Any other thoughts?

Thanks


On 2 Aug, 18:00, (Alan
Pemberton) wrote:
wrote:
Any other thoughts as to why the DS608P is in B&W and no signals are
detected?

My first DS608P went 'pop' when I was playing about with an indoor
aerial in a dry, staticky environment. The rf input stage seems a bit
fragile.

Are you getting colour on the rf output? To tune it in, find a blank
channel on the telly, press the red button on the back of the Daewoo for
six seconds and wait. The modulator will step slowly through the 48
available channels. When it reaches the one on the telly, press Select
smartly.

The scart output is switchable between YUV, RGB and S-video, but in each
case the composite video pin carries PAL (it should carry only Y in
S-video and YUV, but the SetPal is non-standard. At least, mine is).

To enter the engineering menu press

Status
Select
Text
Text
Select

There are some handy colour bars on the last option (or first if you
work backwards).

--
Alan Pemberton
Sheffield, South Yorkshire, England
To e-mail me directly, please visit
http://www.pembers.freeserve.co.uk/index.html#Mail-me