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Re: Sanyo LCD-40R50F lcd tv shorted mainboard - need help
either that, or you can cut the legs off with a knife and get rid of the leftovers on the pads with solder wick.Comment
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Re: Sanyo LCD-40R50F lcd tv shorted mainboard - need help
Well, I finally took out the main chip (the burnt one)...and the short went away!! I guess that was the problem.
Now, how/where do I find this chip to purchase? Can I use another chip?
any ideas?
thanksComment
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Re: Sanyo LCD-40R50F lcd tv shorted mainboard - need help
best idea I can come up with is to look for the IC on Aliexpress or some other china mart, or look for a "universal lvds board" and convert the TV.Comment
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Re: Sanyo LCD-40R50F lcd tv shorted mainboard - need help
Budm cited a site that has a main board available, but they want a hefty $65US plus $25 shipping. At this point, I'm unwilling to put in $90US into this tv.
I found this site that has three ic numbers for the same chip. Are they all compatible??
RTD2932 RTD2933H RTD2934S
http://www.aliexpress.com/store/prod...0.0.0.0.BggzzhLast edited by jackal68; 04-13-2015, 06:58 PM.Comment
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Re: Sanyo LCD-40R50F lcd tv shorted mainboard - need help
After buying from a seller from Aliexpress and paid through paypal over a month ago, I still did not receive this chip. I eventually had to open a dispute through paypal and got my money back.
Back to the drawing board to get this chip.....still looking.Comment
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Hey guys great forum glad to have found it. I bought a Sony XBR 65X900C cheaply because it didn't work. No signs of life at all not even a light/led. All I hear is a brief high voltage sound when I throw the power to it.
Didn't see any obvious signs of damage so right away started checking voltages. This is what I see:
Power Board Connector that goes to Main board
CN6401
Pin 01 NC
Pin 02 NC
Pin 03 "BL_ON": 0V
Pin 04 "N/C"
Pin 05 "STBY 3.3V": 3.5V
Pin 06 "GND": N/C
Pin 07 "AC_OFF"... -
ONN 100012588
Issue: No Power, Then Rebooting After Main Board Change
Short answer: replace main board and power board
Technical answer: replace main board and Q306 & Q307 on power board.
Long answer:
TV wouldn't turn on. Power switch was fine which means the main board isn't processing the power on signal. Replaced main board. TV turns on now but randomly reboots. Bad main board? EEPROM? Tried to pull main board and got a shock touching the corner of the board. That's weird. C334 (450V 10uf) capacitor is still holding a high charge.... -
This thread is about trying to get an Universal Main Board to work with a Sharp TCON and panel.
I have a Sharp LC-46D85UN TV that has had a main board issue. Since this model is from 2009, I am not able to find an exact replacement of the main board. Instead, I decided to see if I can future proof this tv by getting a Universal Main Board (T53U21.2) from China to work with the Sharp TCON (CPWBX4291TPZA) and panel. The universal main board supports a 8 bit dual channel LVDS interface whereas the TCON requires a 10 bit dual channel LVDS input. I have modded the LVDS connector to match... -
When plugged in it will click and cycle the BL on and off, no pic and does not respond to remote. When I disconnect the cable from the PS board to the main board and then plug it in the BL will come on and stay on. There are only two boards in this set, the LVDS cables from the panel driver boards connect directly to the main board. Since the BL comes on and stays on I'm thinking the PS board is ok and the problem is on the main board. Should I order another main board or do I need to do more testing? thanks, Lee -
What would cause a main board to die when you disconnect AC power to the TV?
This is the second board that it has happened with. All I am doing is disconnecting the power cord from the wall and plugging it back in.
I replaced the main board because I was not getting a signal on PS_ON when pressing the power button. The PSU was/is still sending its 5v standby signal
Thanks
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