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I replaced the Convergence ICs (STK392-120) in my Magnavox 51MP3964H/17, but when we soldered the new ones in, there was a solder bridge. We fixed that problem but the red is still out of whack. (Still bowed on both sides of the tv). Tried doing manual convergence and auto convergence to no avail. Help!
I checked them out. They dont seem to have any white around the middle. I thought maybe the ICs were damaged due to the solder bridge. But then again Im not the expert lolI checked them out. They dont seem to have any white around the middle. I thought maybe the ICs were damaged due to the solder bridge. But then again Im not the expert lol
I went into the tech menu and there was an error code 9, which in the 2000 page service manual says "Bocma IC TDA888xx 8V failure (SUP bit)" then under that it says in bold letters "Significance changed to" HCS-GDE communication failure" I have no idea what that means. It is an HD set. Everything on the screen looks pink too. Im not sure what I did there.I went into the tech menu and there was an error code 9, which in the 2000 page service manual says "Bocma IC TDA888xx 8V failure (SUP bit)" then under that it says in bold letters "Significance changed to" HCS-GDE communication failure" I have no idea what that means. It is an HD set. Everything on the screen looks pink too. Im not sure what I did there.
If you shorted pins when you soldered the chips in you could have damaged one of the chips--the resistors can be checked with a ohm meter(like checking a fuse---no reading across any means open) DID YOU TRY TO ADJUST THE SET IN THE CUSTOMER MENU OR THE TECH MENU---SOME OF THESE SETS NEED A LOT OF ADJUSTMENT AFTER THE CHIPS ARE REPLACED---to enter convergence tech menu: use the philips remote---0 6 2 5 9 7 and hit status button----instructions will appear on the screen--see if it will adjust in this mode---takes some real time with these sets to adjust and the HD if it is a set with HD has to be adjusted separate. Adjust red first and then blue. SD TECHIf you shorted pins when you soldered the chips in you could have damaged one of the chips--the resistors can be checked with a ohm meter(like checking a fuse---no reading across any means open) DID YOU TRY TO ADJUST THE SET IN THE CUSTOMER MENU OR THE TECH MENU---SOME OF THESE SETS NEED A LOT OF ADJUSTMENT AFTER THE CHIPS ARE REPLACED---to enter convergence tech menu: use the philips remote---0 6 2 5 9 7 and hit status button----instructions will appear on the screen--see if it will adjust in this mode---takes some real time with these sets to adjust and the HD if it is a set with HD has to be adjusted separate. Adjust red first and then blue. SD TECH
check all the 6.8 ohm green resistors near the chips---any that are white in the middle are gone. If not, you may have got one of the new chips.check all the 6.8 ohm green resistors near the chips---any that are white in the middle are gone. If not, you may have got one of the new chips.
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If the colors are not matching and shapes have a red, green or blue halos, then the problem is convergence rather than the color wheel. The problem is usually fixed replacing the two convergence ICs in the alignment circuit. The replacement involves de-soldering of two old ICs and soldering new ones in places. More components in convergence board (resistors, fuses etc.) may need to be tested and replaced. The repair ad the soldering job require training and experience and must be done by a technician.
The convergence ICs and resistors have failed. You will need to install a convergence repair kit. The Phillips DPTV305 chassis convergence repair kit is the correct one for your magnavox. Its available at www.tvrepairworld.com and the kit contains the 2 ICs and resistors and the CD with repair instructions.
Remove the screws and take the back panel off the TV. The convergence ICs are located behind a large heat sink.
Remove the board that the ICs are on.
Check all the big resistors on the board using the digital multimeter. Some resistors are connected in parallel so they read half of their nominal resistance.
Check the board for cracked solders and tracks.
Cut all the legs of the ICs and unscrew them from the heat sink to take them out.
Remove all the legs by applying soldering iron on one side and pulling on the other side.
Clean the holes for the new ICs with the soldering iron and solder pump.
Clean the heat sink from the old thermal compound or grease and apply the new one to the ICs.
Fit the new ICs legs on the holes and screw them to the heat sink. Wipe excessive grease. Make sure they are making good contact with the heat sink.
Cut excessive length of legs. Leave about 2mm and solder it in.
Clean solder points with lacquer thinner or even alcohol.
Make sure no solder is going to two legs at the same time.
Put all back together.
You may need to readjust the convergence on the menu.
You need to replace Both of your STK convergence ICs they are big black ICs will have part number on them STK392-110 ,ect if you can solder you can fix it your self ,TV repair shop m/b 300.00 also you will need Service Code to be able to enter into TECH alinement mode .Call Mats Electronics for parts 1-800-628-1118
Replace Both convergence ICs STK392-120s use 180s better ICs they are big black ICs will have STK on them Mat Electronics for parts 1-800-628-1118.Also CK 6.8 ohm resistors around STKs.
It looks like your convergence amplifiers have gone bad, this is a common problem. If your set uses the STK329-110 or STK329-xxx series of amplifier both of them will have to be replaced. There is a lot of information on fixya about how to do this yourself, but you have to be careful in removing and replacing the amplifiers and the associated bias resistors.
Your convergence amplifiers ICs have become defective, They will have to be changed out. They are usually marked with a STK392-110. You will have to also change out the fusable links connected to the STK392-110. Desolder the pins and unscrew the ICs and remove both of them. Then desolder the fusable liks and replace them with the new ones, then insert the new ICs and solder them in (being careful not to create solder bridges). Then you will have to perform the convergence on your TV, Try to use Auto-Convergence to do this.
they have to be soldered in place after you de-solder the old ones. Radio shack has a de-soldering iron with a rubber bulb that makes this easy. Then solder your new ones in use a pencil iron 30 watt also available from radio shack. Use heat sink compound on the back of the ICs where they contact the heat sink. This compound is also a Radio shack item. Just be careful not to bridge any of the pins together with solder. Check your solder with magnifying glass before powering it up
Your Convergence amp ICs are bad. Heres how you fix It.
they are located on a huge heat sink inside your set. Just look for the largest aluminum heat sink inside your set. You will notice them they are large black ICs with about 16 pins on them. Just unsolder the old ones and solder in the replacements. just be sure to put some heat sink compound on the back of the new ICs where they contact the heat sink. You can get a de-soldering iron at radio shack with a rubber bulb to make the de-soldering alot easier and you will also need a low wattage soldering Iron to solder in the new ones. Just mark any wires you remove to get the convergence module out. That way you will know where the wires plug in when your finished. It will need a convergence adjustment when your finihed. Be careful not to bridge any of the pins with excess solder. Inspect the pins with a magnifying glass when your finished to make sure the solder from any adjacent pins arent touching each other.
I checked them out. They dont seem to have any white around the middle. I thought maybe the ICs were damaged due to the solder bridge. But then again Im not the expert lol
I went into the tech menu and there was an error code 9, which in the 2000 page service manual says "Bocma IC TDA888xx 8V failure (SUP bit)" then under that it says in bold letters "Significance changed to" HCS-GDE communication failure" I have no idea what that means. It is an HD set. Everything on the screen looks pink too. Im not sure what I did there.
If you shorted pins when you soldered the chips in you could have damaged one of the chips--the resistors can be checked with a ohm meter(like checking a fuse---no reading across any means open) DID YOU TRY TO ADJUST THE SET IN THE CUSTOMER MENU OR THE TECH MENU---SOME OF THESE SETS NEED A LOT OF ADJUSTMENT AFTER THE CHIPS ARE REPLACED---to enter convergence tech menu: use the philips remote---0 6 2 5 9 7 and hit status button----instructions will appear on the screen--see if it will adjust in this mode---takes some real time with these sets to adjust and the HD if it is a set with HD has to be adjusted separate. Adjust red first and then blue. SD TECH
check all the 6.8 ohm green resistors near the chips---any that are white in the middle are gone. If not, you may have got one of the new chips.
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