I have a 29" TX-29S95Z set, which insists on setting the sound at maximum when you switch on, or when you change channels.(with about 20% THD!)
The remote works(all buttons tested on a remote tester), and the OSD show fine. The picture is perfect - it is a sound only issue...
You cannot enter the install menu, and you cannot tune any channels.
I suspect that either the uCPU or the sound uCPU has got itself confused. The fact that you cannot enter the normal install menu to tune channels also points to the uCPU, but I don't know how I can reset it.
Does anyone know how to reset the uCPU's in this model?
Is it possible that the EEPROM has become corrupted, and so, is providing false volume settings to the sound uCPU upon power-up?
This chassis uses the TDA9875A Sound CPU chip. It looks fine, does not appear to have suffered a static discharge from the tube, but I can't rule that out...
Unplug tv from the power source for about 2 minutes plug in. If this does not solve your problem U may have to futher check starting at the eprom for 5 Volts. also check for bad solders around the area
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5 blinks - check the 5v SOS D Board since the set is a plasma.
Your best best is to obtain a quote from an authorised Panasonic service centre on the likely cost to replace that board if required, then you can make a decision afterwards - to either go ahead with the repair, or cut your losses and purchase a new set if the latter option turns out to be cheaper.
Always ask about and insist on extended warranties whenever you buy a new TV such as plasmas. These will cover you against expensive repairs, and having to buy a new one each time the old one breaks down in the future.
These days manufacturers lean toward board replacement in plasma and LCD TVs rather than individual components, as it is quicker and easier to replace a whole board than to try and fix an old faulty one. It's also tidier in terms of layout.
The horizontal line indicates the vertical deflection circuit is not working. Either the set is stuck in service mode for adjusting color (turns off vertical), or the deflection circuit has failed.
Some RCA TV sets have a "Service" switch in the back, down near the bottom of the set. Most of the newer sets use a combination of remote control and front panel buttons to get into service mode, and that can be turned off by unplugging the set and plugging it back in. Try looking for the mechanically operated service switch in the back first.
The down button on your remote might be stuck down. Try taking the remote out of the room or cover it up with something. Then turn the sound up at the set and see if it stays up. If this doesn't work, the down button on the front of the set may be stuck or have leakage in the button. This would require taking the set to a service shop. Another possibility would be a loose ground on the CRT dag which can cause this. this also would be something a service shop would need to take care of, as you could get a shock if you attempt this repair yourself.
Since the set works some of the time, I'd first look for poor connections. One thing to keep in mind is when the set does NOT work properly. does that occur more frequently with heat? cold? Humidity? If you can solder, first try resoldering any connecitons on the boards that appear grainy or have rings. If that does not resolve the problem, look for patterns for when the set fails. Those patterns will help to narrow down the possibilities.
This sounds like there is a stuck button. With the TV off, try each of the panel buttons. You should feel the button engage. If not, that is the faulty one that should be replaced. Also, check to be sure that the plastic covering that extends to the actual switch inside the set is not broken causing a switch to be stuck on.
Keep us posted.
You may have a button stuck either on the remote or on the TV itself. If this does not solve the problem, you may have to refer to a service technician. The IF Amp or the sound stage may be at fault. Good Luck, Regards, JUS004
The Sony error codes go up to 7, so when the standby light flashes 11 times it usually means that one of the clock or data lines deep inside the set is shorted to ground. This is not fixable from the front or through the remote, so the set should be serviced by a qualified tech familiar with Sony sets.