Hello I really need help on this one. I have been getting squigly lines along with discoloration on my Toshiba 57H81 rear projection TV. I consulted a proffesional but they have not called me back with how they will remove the TV and I am ready to do it on my own with some knowledge of televisions and I will need help and where I can buy parts. Please if you can provide any assitance. Thanks very much!!
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Re: Toshiba 57H81Problems Please Help
On this model I've found the hyper module to cause lines (Left to right) in the picture. Usually at start up and half the screen, then after warm up, the set will clear up some or completely. Of course a picture of the problem would help in diagnostics.
The hyper module must be soldered in, so, knowledge of soldering is advised.
This PCB can be bought at: Andrews Electroncis or Tritronics.
I do this job in the home, pick up for service should not be required.
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This is the Hyper Module that needs repaired. There are several small sm caps that dry out in this model. It's the module standing up to the right covered by a can as we call it. I really don.t recommend you trying to repair it. One slip and that module is done and you can't by a new or rebuilt one anymore. Please let a repair center look at it and do the work. You won't regret it.
A service manual won't help you on this and yes it's most likely the convergence amps. That unit takes two stk392-110 Sanyo amps. You can substitue with stk392-150's or 180's also... Personally I'd get them from acme sales in florida along with any solder, de-soldering braid, heat sink compound and other supplies you'll need for the job. Acme, because you are assured of getting originals not some chineese knock-offs.
I'd suggest a package of 1.8 ohm/2w resistors, looks like that's what this unit uses in the yoke return circuit and they commonly have failed, and likely the cause for the amp failure. You might also take a meter to any picos in the circuit. F850, 851, 852 and see if any of them are open. If the amp opened you're okay, but if it went to ground it may have opened a fuse.
I will send the manual via Pando - so if you don't already have Pando go there first and download their free program.
If you have zagged lines there are 10 small surface mounted capacitors you will need to change on the HYper Board. This is not an easy repair so alot of folks simply replace the hyper board. You will need a service manual to take this set apart and to get the proper part number. If you have no TV repair experience or do not know how to solder, as the hyper board has sheild arounfd it, you should play it safe and call out a pro to assist you in this repair. Good Luck
These ICs are the Japan types and available from partstore.com under part number C5AA00000108 for $29.08 + shipping apeice. These are original replacements for the panasonic parts. Good Luck
Ps please do not forget to rate this