Sharp LC46D64U Power and OPC Flash

[nomoresonys]

Re: Sharp LC46D64U Power and OPC Flash

One guy traced his same blink code down to inverter 3. one there for 9 bucks, looks like plenty available. https://www.ebay.com/itm/Sharp-46-LC...ZG-r:rk:1:pf:0

[Icitte]

Re: Sharp LC46D64U Power and OPC Flash

One guy traced his same blink code down to inverter 3. one there for 9 bucks, looks like plenty available. https://www.ebay.com/itm/Sharp-46-LC...ZG-r:rk:1:pf:0

there is a way to test it before?

[R_J]

Re: Sharp LC46D64U Power and OPC Flash

I think the manual is a bit misleading, page 62 says error is with DET_10V (pin57) of microprocessor, BUT pin 57 monitors DET_15V (page 104) Trace that back to page 120 and it monitors the UR15V from the power supply
You might want to get the schematic for the power supply.

What voltage do you have on the main filter C7820/21
Check the resistance of R7641, it is a .1Ω/1W resistor that supplies B+ to Q7602 fet
You say you replaced some parts froma SJ kit, were any of the parts you replace defective? ie shorted fets etc.

[nomoresonys]

Re: Sharp LC46D64U Power and OPC Flash

there is a way to test it before?

Read it in this thread. https://www.badcaps.net/forum/showthread.php?t=41621

[Icitte]

Re: Sharp LC46D64U Power and OPC Flash

I think the manual is a bit misleading, page 62 says error is with DET_10V (pin57) of microprocessor, BUT pin 57 monitors DET_15V (page 104) Trace that back to page 120 and it monitors the UR15V from the power supply
You might want to get the schematic for the power supply.

What voltage do you have on the main filter C7820/21
Check the resistance of R7641, it is a .1Ω/1W resistor that supplies B+ to Q7602 fet
You say you replaced some parts froma SJ kit, were any of the parts you replace defective? ie shorted fets etc.

/ok I know it's been a while, but I tested the V at C7820/21 one leg is -31vdc and the other one is around 58.8vdc

R7641 test .1ohm

hope you will accept to help me again!