Mitsubishi WS-65857 65" Rear Projection Television - Answered Questions & Fixed issues

http://serviceman.site88.net/index_files/MitsubishiTV.htm

If you wish to get some details; visit the site linked here. Pull up older posts. http://electronicshelponline.blogspot.com/ Line faults & possible causes to LCD, DLP & Plasma screen are given with illustrations. You can get an idea about the fault to an extent. Faults to all LCD & Plasma screen are similar, irrespective of its brand and screen size.

voltage regulator may be weakening..

the Glycol is toxic and dissolves parts and leads etc.here are the error codes: (unplugging set clears them)

double check the wire connections especially the connectors between the circuit boards. They can sometimes not be seated fully and that can happen. I would also trace back the speaker wire plug to insure its plugged in correctly and at the correct location.

Most likely a power spike occurred and if you are lucky it blew a fuse inside of the TV. You will have to dismantle the back of the unit and look for the fuse on the circuit board. It will be most likely a ACG type fuse. You can get replacements at your nearest Radio Shack.

4 SCREWS 2 ON EACH SIDE THEN IT LIFTS RIGHT OFF BUT VERY HEAVY.

Error 22 means short protect circuit failure. Source of the fault is the power supply board. Since the set is rather old component level repair is the oly option as the replacement boards will be impossible to find. I have the schematics and will help you fix it provided
1)You have a multimeter and know how to use it
2)You know how to solder.
Please let me know if you wish to do it yourself.

Your convergence has failed and need to be repaired. Once quick test is to goto your convergence menu and see if you can adjust red and blue. If not its has failed and needs to be fixed.
You can get the parts and instructions from www.TvRepairKits.com

Hi Itsleenda.

There is not much that you can do at component level. You described a defective TV. Either one of the three CRTs (light tubes) is gone, or the digital controller board is gone. PSU must also be tested.

The technician will test starting from the power supply (PSU). If TV starts up, then testing is reading voltages in the different DDC line.

Second part to test are the CRTs, deflection yokes, and the CRT power boards.

Finally, the tech will test video circuits, main board, terminal board, convergence and jungle. Things to test are mainly grouped in the assembly below, click on picture to enlarge:




Here service manual: Click right mouse button and chose Save File As, direct click and download may not work

If you try to adjust convergence with the flash focus, perfect focus, (depending on the make of your set) or by manual convergence and the lines will not line up or even move. Your symptom sounds like a damaged convergence IC.

If you want to repair this set yourself, I have some instructions below that will be a help to you.
While it is not a very hard repair, this repair can be a bit tricky. If you have a 45W soldering iron, solder, solder wick, heat sink compound, and some basic soldering skills, you can repair the television yourself.
*** VERY IMPORTANT NOTE***

If your set is not producing a clear picture and the colors are not lining up, do not continue to watch the set as this can lead to further failure and possibly damage the individual CRT's in the set.

I have repaired hundreds of these sets, so if you have any questions after reading the following, please reply to this post and I will help you in any way that I can.

With that aside I have some support suggestions that I have put together that may help you make an informed decision. You should be able to get a local service center to repair this at your house for between $350.00 - $450.00, If you want to repair this set yourself, I have some instructions below that will be a help to you. While it is not a very hard repair, this repair can be a bit tricky How do I tell if the IC's are damaged? Since you cannot look inside of an IC, you will have to locate some of the components in the area around the convergence IC's. You may be able to see some resistors that have changed colors or you test a resistor and it no longer reads the value marked by the color bands or the printed value. You will have to replace the IC's and the supporting components.When you remove the old IC's, please be sure to remove all of the old heat sink compound, as it can act as an insulator for the new IC's and cause them to overheat. I usually clean the heat sinks with alcohol and a small rag. Where are the IC's located and how do I find them?There are two and large IC's that control the convergence in a big screen set. Some of the newer sets only have one. If you only have one, it is right in the middle of the set on the center circuit board. They are secured to a very large aluminum heat sink. They will have a part number stamped on them that will start with an STKXXX-XXX, like STK392-110.Along with the convergence IC's there will also be some associated components that will need to be replaced as well. There are some resistors that are part of the convergence circuit that will be open and need to be replaced. Most likely these will appear charred in the center. If you have an Ohm Meter or a DVM, check all the resistors that are close to the IC's and you should be looking for either ones that have opened or have changed values.If one of the convergence IC's are found to be bad, I would replace them both, if one has gone bad the other may go soon. I usually order my parts from Andrews Electronics in California, they will have the OEM components that you will need.Their site is http://www.andrewselectronics.com/welcome.aspxAnd their phone number is a 24-Hour Order Desk: (800) 274-4666I recommend the phone order so you can talk to the person about the different types of IC's that are available.I would also advise that the convergence IC's be OEM or better, just because they are cheap does not mean that they are a good deal. I have seen the cheap IC's fail after a short time, even though they look exactly like the OEM IC's. I think that the bottom line is that you will get what you pay for when it comes to the parts.You can also try http://www.tvrepairkits.com/ , they do carry OEM or better parts. When you order from them you will get a kit with instructions on how to do the repair, step-by-step. I hope this information allows you to resolve this issue. If you need further assistance please comment to this post and I will try to help you further.

Hi - Welcome to FixYa.

As you've already bought the parts, I will try to assist you, but this is really a job for a professional service engineer. If I wrote instructions on how to do this, I would be liable for any damage or injury caused when you attempted self-repair. You could still get a severe electric shock from inside your TV after it has been disconnected from the power.

In addition, Step-by-step instructions would take several pages as this needs to include:

1. Disassembly of the case
2. Location of the components
3. Replacement of the components.
4. Convergence adjustment following IC replacement.

This constitutes a massive amount of information and is too long to post here.

In view of the above, I can provide a link where you can download the full service manual. All of the information you require is contained within. I suggest you download it, read it thoroughly and if, after doing so, you aren't confident of being able to complete the repair yourself, please get a professional service engineer to do it for you. The service manual can be downloaded from here:

http://rapidshare.com/files/433490879/WS-65857.pdf

The download page will open in a new browser window. To download the file, you need to scroll to the bottom right-hand corner of the page and click on "Slow Download". You will need to wait up to 30 seconds before downloaded, as indicated by the timer. When the timer reaches zero, click on "Download now!". SAVE the file (WS-65857.pdf) to an easy to remember location on your PC and when the download is complete, go to that location on your PC and double-click the file to open it. If you are unable to open the file, you will also need to download the latest version of Adobe Reader:

http://get.adobe.com/reader/

You are welcome to reject my solution and seek help from other experts, but I suggest downloading and reading the service manual first as you will then understand the complexity of the task.

Location of the convergence ICs can be found on page 18 - marked on the diagram as "IC8C01&IC8C02 CONV. OUTPUTS"

Regards,
BElectric

Hello, you will need your soldering skills for this one. Try to locate the convergence IC(usually mounted on a heavy aluminum heat dissapator) since this is a mitsu TV I would look for this in the middle board if you have three boards mounted horizontally to the bottom of the service area. The IC or ICs will have a number that start with STK and some numbers, exmple...stk392-110, when you do locate the determined IC, you will have to do some unplugging, make sure you make a diagram of what plugs go where, because you will have to work on the board from the printed circuit(solder side). Once you have the board in a servicing position look under the convergence IC or ICs, you will find several pins that are loose, I would resolder all of them and also look around the whole board to check for other problem areas that might give trouble later. Good luck.

The Convergence ICs and pico fuses need replacement. You can get the convergence repair kit for your model from www.tvrepairworld.com the kits contains the parts and the CD with instructions

Sounds like a convergence problem.

These sets are prone to having this problem when first turned on or after a short warmup.

IN every case it means the convergence out chip or chips need to be replaced--I have seen dozens of Mitsubishi sets with this problem.

Confirm actual model number--I have step by step instructions for this repair and parts cost will be under 30 dollars.

see attached photo which is typical of convergence problem.

SD TECH--Steve

Yes! could be other circuit fault also.

You can select it as you would any normal device through the TV, but first you must set your computer to output to a TV.
In Windows you can do this through the control panel. Once there, select "Appearance" and then "Display Settings" or something along those lines (depends on what OS you have). Then you can choose to use the TV as your primary or secondary monitor.
If you need more specific help, let me know what OS you have, and I'll get back to you.

More often that not this is caused by a a faulty Switchmode Power Supply, going faulty, Or another short circuit fault elsewhere is shutting down the power supply for safety reasons, and to avoid a possible fire etc. You will need to take the unit to a reputable service center and ask for a firm "Quote" before allowing any work to proceed.

For the most part even generic passives are fine. I wouldn't use generic actives because of reliability.
The power supply chirps and drops off because it is shutting down from an overcurrent condition. Try disconnecting other boards, one at a time, to isolate overload. If it still chirps check your IHVT (flyback) and HOT (horizontal output transistor). If the HOT reads shorted across any two legs, it is bad. The HOT drives the IHVT. The IHVT has multiple taps for various supplies. Sorry, I don't have a schematic to be able to tell you what voltages at what pins.

SOUNDS LIKE A HIGH VOLTAGE ARC. THIS CREATES NOISE THAT PASSES TO ALL OTHER CIRCUITS. THERE CAN BE SEVERAL PLACES THIS CAN HAPPEN ALL AROUND THE TUBES. THERE SOCKETS AND THE HIGH VOLTAGE TRANSFORMER