Does anyone know where I can get service information for a Samsung LCD
TV Model LE37R87BDX.

Google gets lots of hits, but they are all dead ends in one way or
another.

Mine has just decided to switch itself off and sulk ! :-(

Thanks.
--
Best Regards:
Baron.

"Baron" wrote in message
...
Does anyone know where I can get service information for a Samsung LCD
TV Model LE37R87BDX.

Google gets lots of hits, but they are all dead ends in one way or
another.

Mine has just decided to switch itself off and sulk ! :-(

Thanks.
--
Best Regards:
Baron.

Hi Baron

I don't have access to service info for that tv unfortunately, but if it's
like most LCDs, the dead set symptom is mostly down to psu trouble, and most
are not that difficult to sort without schematics. Often, it's just caps, as
I'm sure you've seen mentioned on here many times. You will often find the
voltages marked on the psu boards. By connectors is a good place to look.
Typically, there will be a standby supply of 3v3 and/or 5v. The main
switched rails are usually some or all of 3v3, 5v, 12v, 24v for the
backlight supply, and 33v for the tuner. Occasionally, the odd negative
rail.

If it does come down to psu, and you can't fix it, a replacement board is
available here

http://www.lcdpartsforyou.com/apps/w...ts/show/940845

for a very reasonable price. In the meantime, I will ask my mate who does a
great deal of LCD tv repairs, if there is anything common on that model that
he knows of.

Arfa

On Jan 4, 4:14*pm, Baron wrote:
Does anyone know where I can get service information for a Samsung LCD
TV Model LE37R87BDX.

Google gets lots of hits, but they are all dead ends in one way or
another.

Mine has just decided to switch itself off and sulk ! *:-(

Thanks.
--
Best Regards:
* * * * * * * * * * *Baron.

Have you checked SAM"S PHotofacts?

"Baron" wrote in message
...
Does anyone know where I can get service information for a Samsung LCD
TV Model LE37R87BDX.

Google gets lots of hits, but they are all dead ends in one way or
another.

Mine has just decided to switch itself off and sulk ! :-(

Thanks.
--
Best Regards:
Baron.

OK. Had a word with my mate, and he says that it's pretty much always power
supply caps on that model. He reckons that there's about four of 'em which
will all have blown their tops, and he says it's obvious as soon as you take
the back off. He also said that if it has been a bit iffy at starting up for
a while, then sometimes, it also ****s the EEPROM, so if there are any
further issues after replacing the caps, that will be the cause.

Good luck with it ! d;~}

Arfa

Arfa Daily Inscribed thus:



"Baron" wrote in message
...
Does anyone know where I can get service information for a Samsung
LCD TV Model LE37R87BDX.

Google gets lots of hits, but they are all dead ends in one way or
another.

Mine has just decided to switch itself off and sulk ! :-(

Thanks.
--
Best Regards:
Baron.

Hi Baron

I don't have access to service info for that tv unfortunately, but if
it's like most LCDs, the dead set symptom is mostly down to psu
trouble, and most are not that difficult to sort without schematics.
Often, it's just caps, as I'm sure you've seen mentioned on here many
times. You will often find the voltages marked on the psu boards. By
connectors is a good place to look. Typically, there will be a standby
supply of 3v3 and/or 5v. The main switched rails are usually some or
all of 3v3, 5v, 12v, 24v for the backlight supply, and 33v for the
tuner. Occasionally, the odd negative rail.

If it does come down to psu, and you can't fix it, a replacement board
is available here

http://www.lcdpartsforyou.com/apps/w...ts/show/940845

for a very reasonable price. In the meantime, I will ask my mate who
does a great deal of LCD tv repairs, if there is anything common on
that model that he knows of.

Arfa

Hi Arfa,
Thanks. I did pull the back off today and as you say the voltages are
marked on the PSU PCB. All the ones that I could identify I probed
without finding one that wasn't correct.

I did note that the red led in the middle of the power button seems to
have a weird flash sequence, so I suspect that its some kind of fault
code, a bit like the BIOS beep codes.

Once again I'm grateful for any help I can get.
Many Thanks.

--
Best Regards:
Baron.

Inscribed thus:

On Jan 4, 4:14Â*pm, Baron wrote:
Does anyone know where I can get service information for a Samsung
LCD TV Model LE37R87BDX.

Google gets lots of hits, but they are all dead ends in one way or
another.

Mine has just decided to switch itself off and sulk ! Â*:-(

Thanks.
--
Best Regards:
Baron.

Have you checked SAM"S PHotofacts?

No ! But I will. Thanks for the pointer.

--
Best Regards:
Baron.

Arfa Daily Inscribed thus:



"Baron" wrote in message
...
Does anyone know where I can get service information for a Samsung
LCD TV Model LE37R87BDX.

Google gets lots of hits, but they are all dead ends in one way or
another.

Mine has just decided to switch itself off and sulk ! :-(

Thanks.
--
Best Regards:
Baron.

OK. Had a word with my mate, and he says that it's pretty much always
power supply caps on that model. He reckons that there's about four of
'em which will all have blown their tops, and he says it's obvious as
soon as you take the back off. He also said that if it has been a bit
iffy at starting up for a while, then sometimes, it also ****s the
EEPROM, so if there are any further issues after replacing the caps,
that will be the cause.

Good luck with it ! d;~}

Arfa

There are no obvious signs of any damage. No smells, no burning, no
noise, not that I would have heard it over the program sound. Though
bad caps was the first thing that I suspected.

I'm going to take it into work with me tomorrow and have a look at the
power rails with a scope.

I'll report back. Take care.
Thanks again.

--
Best Regards:
Baron.

Baron Inscribed thus:

Arfa Daily Inscribed thus:



"Baron" wrote in message
...
Does anyone know where I can get service information for a Samsung
LCD TV Model LE37R87BDX.

Google gets lots of hits, but they are all dead ends in one way or
another.

Mine has just decided to switch itself off and sulk ! :-(

Thanks.
--
Best Regards:
Baron.

OK. Had a word with my mate, and he says that it's pretty much always
power supply caps on that model. He reckons that there's about four
of 'em which will all have blown their tops, and he says it's obvious
as soon as you take the back off. He also said that if it has been a
bit iffy at starting up for a while, then sometimes, it also ****s
the EEPROM, so if there are any further issues after replacing the
caps, that will be the cause.

Good luck with it ! d;~}

Arfa

There are no obvious signs of any damage. No smells, no burning, no
noise, not that I would have heard it over the program sound. Though
bad caps was the first thing that I suspected.

I'm going to take it into work with me tomorrow and have a look at the
power rails with a scope.

I'll report back. Take care.
Thanks again.


Hi Arfa,
Well I scoped the power rails without finding anything I could report as
useful. The ripple that I did find was around 120mv and that was on
the 33v rail. Some really odd waveforms on other pins, but meaningless
without knowing what they were for. I did note that the heatsink for
the CPU got moderately hot over the ten/fifteen minutes that I was
checking voltage lines.

Stuck for the moment. :-(
Thanks:

--
Best Regards:
Baron.

Hi Arfa,
Well I scoped the power rails without finding anything I could report as
useful. The ripple that I did find was around 120mv and that was on
the 33v rail. Some really odd waveforms on other pins, but meaningless
without knowing what they were for. I did note that the heatsink for
the CPU got moderately hot over the ten/fifteen minutes that I was
checking voltage lines.

Stuck for the moment. :-(
Thanks:

--
Best Regards:
Baron.

I'll be in his shop tomorrow. If I remember, I'll ask if he's had anything
else on those. Was there any prior symptoms ? Did it fail whilst on, or fail
to come out of standby. What exactly is the standby LED doing ? If it is
pulsing, have you tried unplugging the backlight inverter ?

Arfa

Arfa Daily Inscribed thus:

I'll be in his shop tomorrow. If I remember, I'll ask if he's had
anything else on those. Was there any prior symptoms ? Did it fail
whilst on, or fail to come out of standby. What exactly is the standby
LED doing ? If it is pulsing, have you tried unplugging the backlight
inverter ?

Arfa

Hi Arfa,
It was running just fine, then without any warning the display went off
and the little red standby LED in the middle of the button started
flashing. 3short, delay, 1long, off, delay then the sequence starts
again.

No I haven't disconnected the backlight panel. There seems to be 6 or 8
inverters on a separate panel running vertically up the left side,
viewed from the rear. There is a single multiway cable connecting the
inverter panel to the PSU board. The backlight panel is under a metal
screen, making it hard to see underneath without removing fairly
substantial metalwork.

Thanks:
--
Best Regards:
Baron.

"Baron" wrote in message
...
Arfa Daily Inscribed thus:

I'll be in his shop tomorrow. If I remember, I'll ask if he's had
anything else on those. Was there any prior symptoms ? Did it fail
whilst on, or fail to come out of standby. What exactly is the standby
LED doing ? If it is pulsing, have you tried unplugging the backlight
inverter ?

Arfa

Hi Arfa,
It was running just fine, then without any warning the display went off
and the little red standby LED in the middle of the button started
flashing. 3short, delay, 1long, off, delay then the sequence starts
again.

No I haven't disconnected the backlight panel. There seems to be 6 or 8
inverters on a separate panel running vertically up the left side,
viewed from the rear. There is a single multiway cable connecting the
inverter panel to the PSU board. The backlight panel is under a metal
screen, making it hard to see underneath without removing fairly
substantial metalwork.

Thanks:
--
Best Regards:
Baron.

It's only the plug to the inverter board that you need to remove. From the
described symptoms, I doubt that the problem is going to be that, but it is
common for backlight inverters to fail on all makes of LCD TV, and the
excess load then placed on the PSU's 24v rail can cause some odd and bizarre
startup problems, depending on how and where the supply monitors it's output
voltages and the current draws on the various rails. Normally, although the
connector to the inverter board has a lot of wires, most of them are just
paralleled-up +24v and gnd. There is often a control wire also.

I was unable to check further with my mate today, as he is off with man-flu.
The other guy in the shop is more computers than TV, so doesn't know a lot
about TV faults.
Arfa

Arfa Daily Inscribed thus:

"Baron" wrote in message
...
Arfa Daily Inscribed thus:

I'll be in his shop tomorrow. If I remember, I'll ask if he's had
anything else on those. Was there any prior symptoms ? Did it fail
whilst on, or fail to come out of standby. What exactly is the
standby LED doing ? If it is pulsing, have you tried unplugging the
backlight inverter ?

Arfa

Hi Arfa,
It was running just fine, then without any warning the display went
off and the little red standby LED in the middle of the button
started flashing. 3short, delay, 1long, off, delay then the sequence
starts again.

No I haven't disconnected the backlight panel. There seems to be 6
or 8 inverters on a separate panel running vertically up the left
side, viewed from the rear. There is a single multiway cable
connecting the inverter panel to the PSU board. The backlight panel
is under a metal screen, making it hard to see underneath without
removing fairly substantial metalwork.

Thanks:
--
Best Regards:
Baron.

Hi Arfa,

It's only the plug to the inverter board that you need to remove. From
the described symptoms, I doubt that the problem is going to be that,
but it is common for backlight inverters to fail on all makes of LCD
TV, and the excess load then placed on the PSU's 24v rail can cause
some odd and bizarre startup problems, depending on how and where the
supply monitors it's output voltages and the current draws on the
various rails. Normally, although the connector to the inverter board
has a lot of wires, most of them are just paralleled-up +24v and gnd.
There is often a control wire also.

Yes I did disconnect the cable from the main board to the inverter board
where it connects to the PSU board. It made no difference ! :-(

I've a sneaky feeling that the flashing sequence of the power LED is
trying to tell me something, but I haven't been able to find out what.

I was unable to check further with my mate today, as he is off with
man-flu. The other guy in the shop is more computers than TV, so
doesn't know a lot about TV faults.
Arfa

I'm afraid thats the camp I'm in. 35+ years ago TV's were much more
understandable, read simple, to understand.

Your help is very much appreciated.
Thanks:

PS. At least the old 28" Bush and digibox still work... (*)

--
Best Regards:
Baron.