Forum > LCD TV forum
Sharp Aquos LC-26P70E
In_Focus:
Something that has just come to mind is that some models would shut down due to the inverter pcb screws being loose. Does sound like an inverter issue but the lamp error counter makes life very difficult with Sharp.
I remember now the inverter is very different to as there are 20 or more optos on the P50 series, I suspect you may need to disable the protection circuit if possible as with the D44 series to progress.
Good luck.
OldLes:
Over the weekend, I found a few minutes to get the inverter board on the bench, with ONLY a 24v supply from the bench PSU. I am working on the assumption that it would perform OK for a few seconds. Nothing happened. Voltage at the inverter control IC (BD9883FV) pin 20, BUT no Vcc (REG) output at pin 19.
I may try putting +5v on 19 to see if anything happens, but I suspect the IC is faulty.
Any comments?
Les.
ANDRASONI:
Try to enter in "service mode"(press VOL-and INPUT or AV,after VOL- and CH-) an RESET the "lamp counter error".Exit service mode: unplugged the AC power cord and wait 30 sec.Success, from Romania, all the best! :051bye:
In_Focus:
--- Quote from: OldLes on June 25, 2013,03:54:25 ---Over the weekend, I found a few minutes to get the inverter board on the bench, with ONLY a 24v supply from the bench PSU. I am working on the assumption that it would perform OK for a few seconds. Nothing happened. Voltage at the inverter control IC (BD9883FV) pin 20, BUT no Vcc (REG) output at pin 19.
I may try putting +5v on 19 to see if anything happens, but I suspect the IC is faulty.
Any comments?
Les.
--- End quote ---
A 24V supply alone will not statup up the inverter, you will also need to feed 3.3V to pin 12 of CN7501.
OldLes:
Thanks for that, I will try when I get a few spare minutes.
Les
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version