At Fixya.com, our trusted experts are meticulously vetted and possess extensive experience in their respective fields. Backed by a community of knowledgeable professionals, our platform ensures that the solutions provided are thoroughly researched and validated.
also check FD802A on the power supply board it too feeds the -30 volt line to the convergence boardalso check FD802A on the power supply board it too feeds the -30 volt line to the convergence board
You can't post conmments that contain an email address.
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
You will need the service manual to locate the blown resistors and or the circuit protectors in this TV set. If you know how to read the service manual, the schematic, and trace the circuit, know how to use and ohm meter and a volt meter, I am sure we can fix this set together. Let me know with an e-mail address so I can save you 30 bucks for the service manual. Good Luck
If you have changed the convergence board without changing the symptoms, then when the original board became defective, the power supply was effected. I would be looking for the 24V power lines (both positive and negative). There may be low valued resistors on the power supply board that feed the convergence board. These will act like fuses. They may be discolored. Take a look around the area and update this with what you find.
Follow the traces on the PC board from the ICs and you should find either pico fuses marked as Fxxx on the board or low valued resistors that may appear to be a bit burned. Some of those parts may be defective. These are the "feed" resistors or fuses for the power to the ICs. The low valued resistors are current limiting resistors that act like fuses. If any of those are open, the convergence ICs won't function properly.
they are located on the board on the left when looking in the rear of the set ( Brown Board) you can get the convergence repair kit at the follwing link which has the ICs , the six pico fuses and four of the feed resistors, plus it comes with instructions, Here's the link.
This is an indication that the convergence amps are drawing too much current which has an effect on the power supply and thus killing your sound by removing or lowering the voltage supplied to that stage, finally this results in the blowing of the fuse. I would suggest that you change the convergence amplifiers and the biasing resistors (All of them) and then see if this corrects your problem (I believe it will). Also get a schematic of the TV and try to find out how the power supply relates the sound module and the convergence module, they might share a common power bus, or the voltage regulator for the sound also feeds the convergence board.
this is a convergence issue. it is caused by one of three things
1. a bad convergence board
2. a bad fuse feeding the convergence circut
3. a bad relay feeding the convergence circut
whatever the one it is they all have the same result, an inoperative convergence curcut. needs service .
if it is still under warranty, great. If not the parts can cost up to $300 and labor can be the same
×