Question about Sharp 55R-WP4H 55" Rear Projection Television

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Sharp view timer blinking

I took apart the back of the tv I do not see where there is a b+ connection. There are three groups of wires plugged into the board that contains the stk392-040 is one of those groups of wires the b+ connection?

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  • rlawrence947 Jan 31, 2009

    You and some other fixya guy's helped me big time t.v. works good now just in time for the super bowl sunday thank for all your help

  • scoopingstud Mar 10, 2009

    About 18 months ago, my Sharp 55R-WP4H developed a blue shadow. After browsing this site, I figured out to change the two convergence ICs and everything worked.

    About month ago, the set would not turn on anymore, and the timer light was blinking 3 times. I again changed the convergence ICs, and the TV came back on, but the picture was terrible, it looks like a 3D movie with out glasses, it has a small horizontal pin-cushion distortion and a strange blinking every 30 seconds. If I unplug the D1 and D0 connectors from the convergence board, the TV still turns on and looks the same (red, blue, and green shadows), but the picture blink every 30 seconds is gone.

    I suspect I received partially defective convergence chips, or one of the low-ohm resistors on the convergence board is bad. What do the low-ohm resistors look like and how can I tell if they are bad? I have a multimeter. Do I need to disconnect the resistors before I test them? There are quite a few resistors on this board, and I'm not really sure what to look for. Any help would be great!

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  • 24 Answers

Premtech suggest you unplug that. I unplugged the bigger of the 3 and it came on but looked horrible. Ordered up some stk392-040s installed and my tv came on still looked funny. After talking some via email wiht premtech I found that one the low ohm resistors was faulty replaced it and bam back to sittin on the couch and enjoying tv.

Posted on Jan 26, 2009

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I have rear projection tv sharp 55u-wp7h. Unable to turn on tv due to view timer automatic turn on. what cause that and how to fix the problem?


I'm having same issue with same TV. It powers off after about an hour and red power light starts flashing. Only way to power back on is by unplugging TV and waiting a while, then plugging it back in, but then the TV will turn off again after a few more minutes, red light flashing again. I've checked the sleep timer and it is turned off, so any other solutions to this problem? All capacitors on power board look fine (not blown). I've read it could be solder joints in power board need to be resoldered.

Dec 17, 2010 | Sharp 55R-WP4H 55" Rear Projection...

1 Answer

View timer keeps blinking..tv wont turn on.nobody set view timer..is there a reset button? tried to unplug but no luck


Mute + 1 + 8 + 2 + Power.

Your TV set should now say “Loading Factory”.

Browse down to “Option” then press Enter (or the right cursor button).

NOTE: The Mute+1+8+2 buttons need to be pressed down consecutively and fairly quickly. If your TV does not enter the service menu after using this combination, you can substitute MENU instead of MUTE. This seems to work for some sets. Also, the right cursor arrow also acts as the ENTER button, so try it if you’re having difficulty with the ENTER button.

To exit the service menu, hit press the EXIT button or just turn off your TV (remember not to turn on your TV immediately afterward!)

Apr 14, 2010 | Sharp 55R-WP4H 55" Rear Projection...

2 Answers

Sharp 55R-WP4H view timer blinking


IF THE B+ SUPPLY IS BEING PULLED DOWN DUE TO A SHORTED IC. UNPLUGGING THE CONVERGENCE BOARD MAY ALLOW THE SET TO COME ON. COMFIRMING YOU HAVE A PROBLEM WITH THE CONVERGENCE IC AND POSSIBLE IC'S.

Jan 16, 2009 | Sharp 55R-WP4H 55" Rear Projection...

1 Answer

Sound but no picture!


I would double check the wire connections especially the bridged connectors that connect the A and D boards also see if the wire from the front panel PCB is actually hooked up. Often its easy to get a wire plug mixed up and plugged into the wrong socket or not seated properly.

Nov 30, 2008 | Panasonic PT-51HX41 51" Rear Projection...

1 Answer

View timer only lights


TV WILL NOT NOT TURN ON RED VIEW TIMER LIGHT FLASHES AND THEN I CAN'T TURN OFF TV

Mar 29, 2008 | Sharp 61RWP4H 61" Rear Projection...

1 Answer

Green Timer lights blinks for about 10 sec. Then Lamp light, then nothing


Definitely sounds like a power supply problem. Check with your local TV repair/service center about getting it repaired or replaced.

Dec 19, 2007 | Mitsubishi WD62627 62" HDTV

2 Answers

VIEW TIMER


Try unplugging the B+ to the convergence circuit and see if it will power up.. If so replace the convergence amps, two STK392-040 and check all the low ohm resistors.
Bill

Dec 13, 2007 | Sharp 55R-WP4H 55" Rear Projection...

29 Answers

Blinking Green Light on Mitsubishi DLP 52525


Even if you replace the capacitors already mentioned in this
thread, you may still suffer from the Green LED of Death. Here is how Bronson279 helped me resolve the
problem. But note that it involves
adding a switch to your tv set and requires a bit of soldering ability and the
willingness to void your warranty. BUT
you can save big $$$$ on sending the set out for repair.

Here is my solution-
After replacing several bad capacitors (you can get replacement capacitors
from Mouser electronics on line by the way.. be sure to order the same capacitance
values and same or higher voltage rating and be sure they are rated for 105
degrees C.) I still had the dreaded G.L.O.D. Note that the first time I plugged it in
after taking it apart the G.L.O.D was not there and it powered up
normally. But when I had to unplug the
set to fully re assemble it, it came back.




The issue is caused by both the FMT board (formatter) and
the DM (Digital Module) board’s microprocessors tying to establish
communications with each other. Somehow a race condition gets started with each
thinking that the other board needs to be reset and then starting the boot
process over again.





You need to interrupt this cycle with a switch. Buy a DPDT switch from radio shack (or Mouser
Elec…) and again take apart your electrical chassis (If you have it apart
replacing bad caps you might as well add the switch or you may end up having to
disassemble the whole thing again.) On
the FMT board along the top edge near the input connector side of the chassis
there is a four wire connector labeled “FC”.
It has two black wires and 1 orange and one Brown wire. Leave the black wires connected and cut the orange and brown ones about an
inch from the connector. Solder four 12
inch wires onto the ends (one on the source side brown, source side orange and
one on the connector side brown and connector side orange) use heat shrink tubing to cover the solder
connection points. (If you can’t get tubing, then electrical tape will do, but
make sure the joints can’t short out to each other or the electrical chassis.) Now take the brown and orange wires from the
connector side and solder those to the middle two terminals of the DPDT switch
(one on each side not both to both terminals) Then pick one side of the outside
terminals of the switch and solder the source side brown and orange wires to
the terminal across from the same color (brown across from brown and orange
across from orange) See the diagram below.
The idea is to connect the wires normally when the switch is closed and
break the connection when the switch is thrown the other way. Before soldering
the wires to the switch add a piece of heat shrink tubing to wire so that you
can cover the solder point up after it is assembled.

























45186c7.jpg






Now re-assemble the electrical chassis and route the switch/wires
outside the chassis (I snipped a hole along the edge of the top fan shield to
get the wires out.) and put it back in the TV.
You need to also get the switch to the outside of the TV somehow (I
drilled a ½ inch hole in the plastic cover to snake the switch through but you
can do it however you like)





Here is how to use it-
From a fresh plug in- throw the switch to the OPEN position (the wires
are not connected) plug in the TV, the green LED should stop blinking after 60
secs like it is supposed to. Once it stops, flip the switch the other way so
the wires are connecting. Hit the power
button. The TV should turn on- your done!
Yeah!

From a plugged in, hmmm my power must have gone out,
state. Assuming you have the GLOD, flip
the switch to the open position, hit the reset button on the front of the tv,
wait for the blinking to stop, flip the switch back closed and turn the TV on
normally… Again you are done…

Note that the first time you turn on the TV you may have to
flip the switch the other way (if the TV won’t turn on even without a blinking
LED) This means that the switch was open and you need to have it closed to get
it to work. If you tried turning on the
TV with the switch open, start over by following the reset button procedure
above.

Note this is much easier to do than it sounds. Also note that it helps if you have the
repair manual. Its titled V26 Repair
Manual –full This is nice to have
because it has a wiring interconnect diagram also which details all the
connector placements

May 12, 2007 | Mitsubishi WD-52525 52" Rear Projection...

1 Answer

View timer is stuck on


take your set to a tech your problem is more a technical problem that sounds as you are having a chip problem that controls the timer

Feb 16, 2007 | Sharp 55R-WP4H 55" Rear Projection...

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