Samsung TXC1950 DEAD no relay

M

Mike

Guest
I received this set, its dead with no relay action.

Checked fuse, ok, checked HOT, ok.

I checked volts, it dies off at the relay.

I put the unit on an iso transformer, and jumped the relay. Set fired up,
and powered on.

if i remove teh short, it shuts off. I checked the volts at the relay coil
when pushing power button, nothing.

Any ideas?
 
Have you checked for a Relay driver Transistor S/C
or associated component .

kip

--
"Watch the return E-Mail addy its false"
"Mike" <mbates14@fuse.net> wrote in message
news:yE_ab.15421$uJ2.1066@fe3.columbus.rr.com...
I received this set, its dead with no relay action.

Checked fuse, ok, checked HOT, ok.

I checked volts, it dies off at the relay.

I put the unit on an iso transformer, and jumped the relay. Set fired up,
and powered on.

if i remove teh short, it shuts off. I checked the volts at the relay coil
when pushing power button, nothing.

Any ideas?
Click to expand...
 
everything in that area I checked.

I pulled out a mirror, and I suspected that teh controller IC/CPU, and the
jungle IC has no power.

because, when i jump the relay the deflection circuits kick on, but none of
the front controls work, the power LED IS NOT on. and there is a dark gray
raster. if i pull the plug, it powers off. There is NO SOUND either.

i think the front ICs dont have power, but I dunno where to look. no
schematic.



"Mike" <mbates14@fuse.net> wrote in message
news:yE_ab.15421$uJ2.1066@fe3.columbus.rr.com...
I received this set, its dead with no relay action.

Checked fuse, ok, checked HOT, ok.

I checked volts, it dies off at the relay.

I put the unit on an iso transformer, and jumped the relay. Set fired up,
and powered on.

if i remove teh short, it shuts off. I checked the volts at the relay coil
when pushing power button, nothing.

Any ideas?
Click to expand...
 
On Sat, 20 Sep 2003 16:29:38 GMT, "Mike" <mbates14@fuse.net> wrote:

everything in that area I checked.

I pulled out a mirror, and I suspected that teh controller IC/CPU, and the
jungle IC has no power.

because, when i jump the relay the deflection circuits kick on, but none of
the front controls work, the power LED IS NOT on. and there is a dark gray
raster. if i pull the plug, it powers off. There is NO SOUND either.
Click to expand...
Is the power switch toggling the uP? You'll have to trace the
circuitry to determine this, with no manual.

Tom

i think the front ICs dont have power, but I dunno where to look. no
schematic.
Click to expand...


"Mike" <mbates14@fuse.net> wrote in message
news:yE_ab.15421$uJ2.1066@fe3.columbus.rr.com...
I received this set, its dead with no relay action.

Checked fuse, ok, checked HOT, ok.

I checked volts, it dies off at the relay.

I put the unit on an iso transformer, and jumped the relay. Set fired up,
and powered on.

if i remove teh short, it shuts off. I checked the volts at the relay coil
when pushing power button, nothing.

Any ideas?
Click to expand...
 
I checked the 12V standby, its good.




"Tom MacIntyre" <tom__macintyre@hotmail.com> wrote in message
news:tjapmv8n8qk78e9048ojkco0g7dqr8ua7d@4ax.com...
On Sat, 20 Sep 2003 16:29:38 GMT, "Mike" <mbates14@fuse.net> wrote:

everything in that area I checked.

I pulled out a mirror, and I suspected that teh controller IC/CPU, and
the
jungle IC has no power.

because, when i jump the relay the deflection circuits kick on, but none
of
the front controls work, the power LED IS NOT on. and there is a dark
gray
raster. if i pull the plug, it powers off. There is NO SOUND either.

Is the power switch toggling the uP? You'll have to trace the
circuitry to determine this, with no manual.

Tom


i think the front ICs dont have power, but I dunno where to look. no
schematic.






"Mike" <mbates14@fuse.net> wrote in message
news:yE_ab.15421$uJ2.1066@fe3.columbus.rr.com...
I received this set, its dead with no relay action.

Checked fuse, ok, checked HOT, ok.

I checked volts, it dies off at the relay.

I put the unit on an iso transformer, and jumped the relay. Set fired
up,
and powered on.

if i remove teh short, it shuts off. I checked the volts at the relay
coil
when pushing power button, nothing.

Any ideas?
Click to expand...
 
"Mike" <mbates14@fuse.net> wrote in message
news:ZL7bb.9902$KJ5.5571@fe2.columbus.rr.com...
I checked the 12V standby, its good.
Click to expand...
Be sure to check standby power AT THE PROCESSOR, it's usually +5Volts,
off a regulator...(7805 or such)
If its there, check for keyboard scanning, make sure no keys are pressed or
shorted; this
will 'kill' any other buttons, even the remote on most sets...you can check
for about 2.5 volts
on the crystal too...

Viper
 
All volteges are there. Im guessing dead uPC. all buttons toggle. each
button works, with about 3.89v toggle.

anyone know where to get one?



"Mike" <mbates14@fuse.net> wrote in message
news:yE_ab.15421$uJ2.1066@fe3.columbus.rr.com...
I received this set, its dead with no relay action.

Checked fuse, ok, checked HOT, ok.

I checked volts, it dies off at the relay.

I put the unit on an iso transformer, and jumped the relay. Set fired up,
and powered on.

if i remove teh short, it shuts off. I checked the volts at the relay coil
when pushing power button, nothing.

Any ideas?
Click to expand...
 
never mind. can of paint fell on the picture tube.


you can guess what happened there. thanks anyway.



"Mike" <mbates14@fuse.net> wrote in message
news:HNLcb.16026$KJ5.13110@fe2.columbus.rr.com...
All volteges are there. Im guessing dead uPC. all buttons toggle. each
button works, with about 3.89v toggle.

anyone know where to get one?



"Mike" <mbates14@fuse.net> wrote in message
news:yE_ab.15421$uJ2.1066@fe3.columbus.rr.com...
I received this set, its dead with no relay action.

Checked fuse, ok, checked HOT, ok.

I checked volts, it dies off at the relay.

I put the unit on an iso transformer, and jumped the relay. Set fired
up,
and powered on.

if i remove teh short, it shuts off. I checked the volts at the relay
coil
when pushing power button, nothing.

Any ideas?
Click to expand...
 
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