and there's talk of a Pioneer LED set based on a Vestel chassis. And the terrible thing is, Pioneer are now whoring their name out to dodgy OEMs.
It's kinda weird jumping from a 9G KURO to the cheapest of the cheapest Vestel LED models. frankly, I'd take a million of these over a single more PW25-4.!
These power supplies, whilst cheaply made with the cheapest off the shelf components, don't look TOO bad, especially when you compare them to a PW25-4. Worst case, the FET blows up again, but it's not expensive. The parts are cheap so I'll just try it and see what it does. I ohmed out the gate drive to Vcc and ground and it's about 2k to each so it doesn't look shorted.
The only major concern I have is if that LED driver IC has been damaged (TPS61199) the FET has around 130 ohm gate-drain and gate-source (with 5 ohms drain-source) so I *think* it's going to be OK.
I will replace the FET and diode and see if the problem is fixed. Polaroid Polaroid 32 HD LED TV 32GSR3000 /32GSR3000FA USER MANUAL 7 J Questions 11 Need some help Tht. So the set appears to only have a PSU fault. So, removed the FET and diode and sure enough now the TV turns on, and you can see a (non-backlit) image on the screen using a torch. This is shorted, preventing the 24V rail coming up, and the main board detects this fault and shuts down. What's happened is this diode being short appears to have damaged the main boost FET for the boost stage (this is all on the secondary so no blown fuses or damage to the primary.) The boost stage takes the ~24V and boosts it to about 60-70V for the LED strip. But, this alone wouln't account for the short on the 24V output - it would just prevent the LED strips working, the TV should still otherwise "work". Surprisingly, it's the diode on the output of the boost converter which is short. Naively testing the commonly failed diodes (on the output) would lead you to suspect the diodes were shorted - but they aren't. There are two faults: the main issue is the 17IPS19-4 power supply 24V isn't coming up, which is due to a FET and diode in the boost converter being shorted. But, somewhat surprisingly that was not the case. Now, I would have thought that the main board had corrupted firmware. Power light flashes, but the set won't power up. In the Audio section displayed on the screen of your POLAROID TQL19R4PR002, select the channel’s original language.
I contacted the company's technical support and the representative informed me that they had a lot of power failure problems with this model TV and that it can be fixed with a replacement part for $222. Then the TV went out completely - no picture, no sound, not even the Polaroid image when the TV first comes on. In the last year, my TV has had some problems: The remote stopped working and the TV just turns off by itself sometimes. We repair older models of Polaroid as well as new models. Our service engineers apply modern diagnostic and high precision instruments to find the cause of malfunction and quickly repair Polaroid.
The total purchase price was $738, plus two years of warranty. Problems associated with the remote control and the receiver, etc We repair Polaroid TVs using original parts, received from the manufacturer.
I purchased a 37" LCD Polaroid TV in 2006 at Walmart. Write us at Become a fan of Consumer Ally on Facebook. If you're having a problem with a business, Consumer Ally can help.