Sharp Aquos LC-60LE832U No Power or Standby Voltage

[budm]

Re: Sharp Aquos LC-60LE832U No Power or Standby Voltage

So nothing really comes up that makes sense yet.

[Sfuchs]

Re: Sharp Aquos LC-60LE832U No Power or Standby Voltage

Well it took some digging but i found it. Now i just need to find it in the US.....
http://m.intl.taobao.com/detail/deta...id=45378557411

[Sfuchs]

Re: Sharp Aquos LC-60LE832U No Power or Standby Voltage

Thanks for all the help. I reviewed the findings with the owner of the tv and since the exstent of the damage is unknown he is going to purchase a new power and main board. Will post results once they are installed.

[PsychoBob]

Re: Sharp Aquos LC-60LE832U No Power or Standby Voltage

I'm experiencing the same problem from my Sharp LC60LE835U with the same power supply. I don't have any power at the main connector. I have followed the checks listed in this thread and everything is the same except I get 0.7 volts on PIN 4 of the IC.

The 6 pin part pulling down the voltage for the OP is still in tact on my board. Any guidance on next steps would be greatly appreciated.

[PsychoBob]

Re: Sharp Aquos LC-60LE832U No Power or Standby Voltage

I can follow the 5v through several areas of the primary circuit but can't find any voltage on the secondary side. I've checked nearly every diode on the board. Also haven't spotted any damaged caps but haven't tested them all yet. Any ideas what I should check next? I just can't figure out where I'm losing standby power.

[wil pinkston]

Re: Sharp Aquos LC-60LE832U No Power or Standby Voltage

found this kit on ebay may be worth a try.

PS-286AP / RDENCA336WJQZ POWER SUPPLY REPAIR KIT SHARP LC-52D85UN LC-52BD80U

[Smudman]

Re: Sharp Aquos LC-60LE832U No Power or Standby Voltage

I know this was a year ago, but I'm having some problems with my Sharp TV (same model number as this post). I was wanting to just replace then main board. Shopjimmy.com is out of stock and the likelihood for getting more is 'bad'. Does anyone know of other sources for parts? What about a kit to replace capacitors? I have a friend that can perform the electrical repairs, I just need to find parts or kits. Any help would be great.

[mmartell]

Re: Sharp Aquos LC-60LE832U No Power or Standby Voltage

How about you start by telling us what exactly you're tv is or isn't doing.

[mattbatt]

Re: Sharp Aquos LC-60LE832U No Power or Standby Voltage

Sharp LC-60LE831U "DPS-183BP A RUNTKA798WJQZ" Same as above.
When the TV was given to me it was turning on and off like the power supply was overheating. I left it running for several hours with the back off and it did fine, so then I tried it with the back on and it powered off permanently.
I found that IC7905 (TNY264PN) blew it's top. So I ordered a new one. I installed it and still have no power. Now, thanks to this forum, I have found the 2.2 ohm fuseable resistor is open. If I have to order parts I'd like to order more than just one resistor.
What else should I test that might have made both parts go bad?
I currently have no DC voltage on connector "PD" going to the mainboard. The Rectifier is showing about 220 VDC.

Fusible resistor 2.2 Ohms R7914 is for feeding the B+ from the main caps to run the IC, so check that out.
R7601 (0.1 Ohm) is also another fusible resistor for the other circuit section.

I could not find "R7601" or a 0.1 ohm resistor on my board. I did test all other resistors and they were within tolerance of their labeled value.
I did learn that the large capacitors don't have a discharge resistor and hold lots of power for several days. Thankfully I only got a tingle from a small cap but my screwdriver left scorch marks when I discharged the big caps!

I'm new to this forum should I have opened a new thread or tacked on to this old one with similar problems to mine?

Thanks for the knowledgeable help.

[Heathric79]

Re: Sharp Aquos LC-60LE832U No Power or Standby Voltage

I have the same board. No 5v stby. Looking at transformer MP-130I there's voltage reading on the primary but nothing on secondary side