Question about Projection Televisions

1 Answer

Yes i need more help on these opto-couplers

Where would they be on the signal board. The Signal board is the one where everything plugs into right? Also were would I get the right coupler replacements?
I also was thinking about replacing the STK392-110 IC'S and the 6.8 ohm 1 watt flameproof resistors on the Convergence board because of the halo efect issue. Do you think this is a good idea or will fix the green halo effect?
Thanks.

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Projection T... Master
  • 8,617 Answers

The halo effect is due to the green and blue CRT coolant being congealed this is a common problem. Red will not have the same condition. As for the opto-couplers they are located on the large signal board in the middle of the board all lined up in a row they will have board location numbers of 7412, 7406 and 7413 . 7412 is usually the culprit the part numbers for 7412 is 9322-105-14682 7406 and 7413 are the same part number 9338-894-15682

Posted on May 16, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Small signal board for RCA HD52W59


Thats caused by the small signal board located on the right side of the set ( Green board with the RCA plug inputs on it. Very common issue with that chassis. The board will have a barcode sticker with an as222 number. You can get replacement boards and any part needed for that model from www.tvrepairworld.com

Jan 28, 2012 | RCA D52W20 52" Rear Projection HDTV-Ready...

1 Answer

When trying to adjust contrast, setting jumps from 42 to 58


oK, I will tell you what Philips told me some years ago about this set and others made at that time.

You have any unusual problem, remote does not work, sound goes out or up and down, etc etc it is the small signal module.

The set has a small signal board (from back it is large board on far left) and the small signal module plugs into it. SSM is about 4 by 5 inches and all surface mounted parts.

The board will have a part number on a label on it.

EVERYTHING is routed thru this board from either the remote or the front control board.

They may still be available on an exchange basis from someone like PTS ELECTRONICS but were over 100 the last time I looked a few years ago.

95% chance your problem is that board.

GOOGLE THE MODEL NUMBER AND ssm OR SMALL SIGNAL MODULE FOR MORE INFORMATION.

REGARDS, sd tech

Sep 22, 2011 | Philips 46PP9302 46" Rear Projection...

1 Answer

The Audio cuts out for a split second every 20-30 seconds.


Check the small signal boards solder connections. The small signal board is the large green circuit board on the right when looking in the rear ( Has all the inputs on it ) Famous for solder issues on the ITC222 small signal boards.slinteriors_22.jpg

Aug 12, 2011 | RCA D52W19 52" Rear Projection Television

1 Answer

I do a channel seach but doesn't find any channels. I've done everything it said to do. What do I need to do. I just changed the congergence fuse. Does that have anything to do with the...


check the thin ribbon cables that go from the deflection board to the small signal board they are both right next to each other if those arent seated properly the small signal board will not get any supply voltages from the deflection board

Aug 09, 2011 | RCA HD52W59 HDTV Projection Television

1 Answer

The picture is wavey tried everything and i am unable to fix can u help me?


The hypeboard has failed. There are about 12 capacitors (surface mount) that need to be replaced. Unless you have very good soldering skills you shouldn't attempt the repair. The hyperboard will be marked with MVPU14 I believe. It should be located directly behind all your input connections in enclosed in a metal can. It is about 8" inch square module that plugs into the signal board.

The metal housing will need to be unsoldered from the signal board, before you can remove and service the hyperl board.

Feb 19, 2011 | Toshiba 50H82 50" Rear Projection...

1 Answer

Unplugged my Ws-55711 TV to move it to another room so the carpet could be cleaned. When I moved it back and plugged it in, the green light kept blinking for more than 60 seconds. I unplugged the TV for...


Open up the front, look under the right side picture tube. Look for puddle of oil on signal board. If you see this, it has bad picture tube & signal board. Not a good repair.

Jan 17, 2011 | Mitsubishi WS-55711 55" Rear Projection...

1 Answer

Mitsubishi WS65807


The Color Signal on this Model Series travels across three boards before being sent to the CRTs. The 3DYC Board, Signal Board and the Terminal Board. Most likely, the 3DYC Board or the Signal Board is causing the problem. I have had intermittent solder connections on the 3DYC Board to cause no color problems. This Board plugs in and is located on the left front of the Signal Board as you look from the rear of the chassis. If you feel you are not up to the task to work on the set, call a Mitsubishi professional. To find one, call Mitsubishi at 1800-332-2119.
I hope this helps,
Skyassoc

Jul 24, 2009 | Mitsubishi WS-65807 65" Rear Projection...

1 Answer

Main screen showing "no signal"


KP-43HT20 has 2 tuners, one is main (TU2) and 2nd is called sub tuner (TU1). Both tuners are mounted on A board located on right side of TV.
In my opinion, main tuner (TU2) is not working and causing No Signal message.
Let me know if you want to repair tv by yourself.to provide you more technical info.

Feb 21, 2009 | Sony KP-57HW40 57" Rear Projection...

2 Answers

Mitsubishi ws-55513


Could be signal board issue,not related to DM.Might be terminal
board problem = less $ and easier to sub than signal PCB.......T.

Apr 15, 2008 | Mitsubishi WS-55513 55" Rear Projection...

1 Answer

Intermittent vertical jitter.


What I've found is that not all models have a PIP module that is removable. Some of the models have a PIP IC (IC6P01). It's built into the signal board. You can't see it unless you remove the shield cover. There is also a plate cover on the underside of the signal board. It's soldered on. This information will help identify your particular model. I also have a built in PIP circuit. I repaired my set by replacing the following electrolytic capacitors. (C2P02 47mf 35v), (C2P03 100mf 16v), (C2P04 47mf 50v) (C2P05 100mf 16v) and (C2P08 100mf 16v). These capacitors are located on the right side of the signal board, where the signal board connects to the main board. They are located next to heat sinked voltage regulators, one of them being IC2P01 (9v IC regulator). I'm not sure which capacitor was the actual culprit, however it's been said that C2P05 fails a lot in these sets. Anyway, good luck with the repair. proton1000

Nov 17, 2006 | Mitsubishi VS-45607 45" Rear Projection...

Not finding what you are looking for?
Projection Televisions Logo

Related Topics:

99 people viewed this question

Ask a Question

Usually answered in minutes!

Top Projection Televisions Experts

Jaime Hernandez

Level 3 Expert

2267 Answers

matt martin
matt martin

Level 3 Expert

1191 Answers

yadayada
yadayada

Level 3 Expert

61168 Answers

Are you a Projection Television Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...