Do you still have 57H81 service manual available? I am trying to replace the STK392-110 Ic's, but don't want to screw up all the connections while taking out the PCB. My email is [email protected]. Really appreciated.
- 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.
Sad to say that after checking my collection of service manual, I don't find this model number. I've also try to search for the direct link online but this in currently not available. I will inform you as soon as the manual is available.
It sounds like you are having a problem in the conversion circuit. The outputs IC’s for that circuit have failed and are need of replacement. The average cost is at least $450 on one trip. Call an Authorized Service Dealer for repair and estimate.
The conversion circuit is the circuit that aligns the picture.
Often convergence issues do not require the entire board to be replaced. You can resolve it by replacing the convergence ICs. The part in question is STK392-110. You will need two of them and they cost around 10$ each. But replacing them is a pretty complicated procedure and I would not suggest it to someone without prior experience. A service manual should get you started in the right direction if you are planning to do this yourself. https://www.completeservicemanuals.com/toshiba/crt-projection-television/57h81-service-manual/prod_1128.html PS: Disconnect from the power supply before you start the repair. Also read the legend, the hv circuits are denoted by a special symbol, so you will know what you shouldn't touch.
You may also need to replace the nearby resistors that may have popped the IC in the first place. Read the service manual for further details.
A 57H81 is not easily disassembled and I wouldn't suggest that over getting a pair of forearm forklifts and a couple of guys to load it in the back of a pickup...
The sevice manual will not show the brakdown you need - and it's not really practical. Guess that's why movers should stick to moving and I'll stick to Tv repair... http://www.buystraps.com/Default.asp?tcode=asp&bhcp=1
PO Box 442
Long Beach, WA. 98631
You will need a service manual to troubleshoot the set to be able to find whats going on with it . Its in shutdown mode with the led flashing. A good manual is available at this link. http://servicemanuals.vstore.ca/
Send me your email address and I'll send you a Pando link to download the schematic...
The caps you're looking to find are Cx261, Cx270, Cx230, Cx178, Cx221, Cx250, Cx670, Cx241, Cx541. You might also check C514 and C5030 all are 10uf\16v but be VERY careful not to screw-up the pads lifing the smd caps in that module.