Re: LG 50PQ30 PSPU-J806A keeps blowing fuse

Any progress? I'm working on the same issue in a Sanyo DP50749... Tv turns on (can hear relays click) then turns itself back off... no backlight, no sound.

Thanks!
-Andy-

Re: Sanyo DP50749-01 wont power on

After probing around with the multimeter I noticed F801 on the PS was bad. I've found a repair kit for the PSU-J808A board, but I have the PSU-J806A board. Havent found much info on it, but they appear to be the same board.

Any comments?

Re: Sanyo DP50749-01 wont power on

I disconnected all cables from the main board, shorted the 2 auto pattern solder pads and plugged in the unit, it tries to power on 2 times (can hear relays clicking), then stops. Pressing power does nothing, disconnecting the power cord and re plugging it in restarts the 2 try cycle. Looks like it could be one of the aforementioned boards...

I will do some googling on the PQ30 to see what info i can bring up.

I really appreciate all the input.

Thanks!
-Andy-

Re: Sanyo DP50749-01 wont power on

Unplugged cable running from power supply to y sus, tv does nothing when pressing power button. Plugged y sus back in and unhooked z sus from the y sus board. Tv will then power on and display the same issues as above.

Re: Sanyo DP50749-01 wont power on

Most of the caps on the power supply are marked with what looks like a sharpie/black marker.

I already replaced IC1670, IC5730, IC1640, and IC1630 on the main board, but that did nothing. Same symptoms before and after new chips were put in.

Thanks for the response,
-Andy-...

Hey everyone,

I've got a Sanyo DP50749-01 that stopped working. I press the power button, can hear the relays click, the power led (front facing LED) is lit for 5 seconds, then turns back off. No picture, sound, or backlight attempt... I can do this 3 times before i have to unplug it and plug it back in (if I dont, pressing the power button does nothing).

Looking for the procedure to force this tv into powering up and running test patterns, a service manual, or any further advice on troubleshooting.

Main Board: Sanyo 1AA4B10N22900
X and Y Sus...

Re: New Members - please post your introductions here

My name is Andy, a 30 year old electronic enthusiast/fixer of all things.

Working on opening a maker space in my small town to help fellow "nerds" and to mentor the "nerdlets"

Currently working on a sanyo tv which brought me across this site, and am excited to become a member of this group of folks!