We will start with this question. This tv clicks but does not start-up. shuts down after about 4 sec. There is no voltage at vset.
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Sanyo DP42545
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Re: Sanyo DP42545
You will get a lot more help by at least up load good clear pictures of the whole backside of the TV showing all the boards and pictures of the whole board of each board.Last edited by budm; 02-18-2018, 07:54 PM.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809
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Re: Sanyo DP42545
Not sure what you could use to load test the Vset line. I believe it is only rated to 50mA, so that would be a little less than 10 watts. If you have already replaced the power board, I would move on to the Y-main board and trace the Vset circuit there.
You said that when you first apply power, Vset reads -198V, then goes to 0. That -198V is the Vscan voltage. Maybe you could check the resistance from Vset to Vscan with cn8003 connected and disconnected. Try the same for Vset to ground.
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Re: Sanyo DP42545
Update on DP42545. A friend of mine has the exact same tv only working, and i was able to sub some boards to determine where my issue was. Well it did turn out to be the power supply board. The bad part is i find no one that has this board available. The parts suggested to check could not be in a much worse place to get at. Do you think i can remove these parts with just a soldering iron. Afraid with all the sub components on the underside of board heat gun would be too much, any suggestions. Thanks in advance.
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Re: Sanyo DP42545
They're all through hole, so should be OK with an iron. Before you remove them, I'd try to get part numbers off them, and look up data sheets to see what you can test in circuit. You may get lucky and find the bad component w/o removing them all. If you look from the top of the board, you'll see that the Vscan and Ve circuits are using the same components (confirm visually). So, you should be able to compare the suspect parts on the Vset circuit with known good parts in the other 2 circuits.
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