Sanyo DP50710 problem

[Mud Digger]

Hey guys, new to the forum here.. I'm working in a sanyo DP50710 that is not staying on. Press power button and there's a click, power light luminates.. Click, off.

I disconnected both x and y boards and still same, I tested voltage and it was off so I replaced the psb. Same thing.. But now since I have proper power, Ive been testing the main boards tp's and I'm not getting any voltage on the 13v audio.

After reading and watching videos I tested the three 1117s voltage regulators and they seem to test proper.. Not sure exactly where to go from here. If anyone has a service manual or can help out I would really appreciate it. Thanks guys!!

[tw2005]

Re: Sanyo DP50710 problem

I don't know about these Sanyos, but a quick search seems to show this model has a Panasonic panel?

maybe post some pics up so we can see what you have.

If it is panasonic based, check resistance across the X board(SS) connector SS11. I know in the panasonics at least that board shorts out.(TNPA5072)

I have read about some issues with some Sanyo mainboards but I have no experience with these.

[tw2005]

Re: Sanyo DP50710 problem

Is this a J4FL or J4FLE main? I had a look at the photos on SJ and from what I see i don't think there will be 13V at that TP because it appears that part of the cct board is not in use. It looks all open cct and there is no voltage regulator IC1670, capacitors or coils etc there.

If you have a look at this and you may have already http://www.youtube.com/watch?v=KSYCn93pz6k

It looks very similar around that part of the board , even that IC has the same designator.

Maybe see if you can upload some hi res shots so someone here can get an idea.

Did find this kit but no clues as to what parts are included.

http://www.ebay.com.au/itm/SANYO-Mai...item1e7cf604e7

[Mud Digger]

Re: Sanyo DP50710 problem

I don't know about these Sanyos, but a quick search seems to show this model has a Panasonic panel?

maybe post some pics up so we can see what you have.

If it is panasonic based, check resistance across the X board(SS) connector SS11. I know in the panasonics at least that board shorts out.(TNPA5072)

I have read about some issues with some Sanyo mainboards but I have no experience with these.

Hi, thank you for responding! Yes, you are correct, it does have a Panasonic panel.. Okay I took some shots, I think they uploaded right.. The ss11 has three prong terminal, when testing the ground and TPVSUS I get no response from the meter, even up to 20m.. When testing between ground and the 15v input line, I get: .05 with then meter or 20m, but when I switch to 200k on the meter, it starts at .5 and steadily climbs up..

[Mud Digger]

Re: Sanyo DP50710 problem

For some reason it's only letting me upload one pic at a time

[Mud Digger]

Re: Sanyo DP50710 problem

Main up close

[Mud Digger]

Re: Sanyo DP50710 problem

Psb

[Mud Digger]

Re: Sanyo DP50710 problem

Overhead

[Mud Digger]

Re: Sanyo DP50710 problem

Is this a J4FL or J4FLE main? I had a look at the photos on SJ and from what I see i don't think there will be 13V at that TP because it appears that part of the cct board is not in use. It looks all open cct and there is no voltage regulator IC1670, capacitors or coils etc there.

If you have a look at this and you may have already http://www.youtube.com/watch?v=KSYCn93pz6k

It looks very similar around that part of the board , even that IC has the same designator.

Maybe see if you can upload some hi res shots so someone here can get an idea.

Did find this kit but no clues as to what parts are included.

http://www.ebay.com.au/itm/SANYO-Mai...item1e7cf604e7

It is the j4fle, So that makes sense. I had seen that video and was wondering why those components weren't installed. Here's a close up shot of that area..

[tw2005]

Re: Sanyo DP50710 problem

Hi, thank you for responding! Yes, you are correct, it does have a Panasonic panel.. Okay I took some shots, I think they uploaded right.. The ss11 has three prong terminal, when testing the ground and TPVSUS I get no response from the meter, even up to 20m.. When testing between ground and the 15v input line, I get: .05 with then meter or 20m, but when I switch to 200k on the meter, it starts at .5 and steadily climbs up..

It's only Vsus that usually shorts but I get about 2.5Meg on mine for both of those. That's with the cable disconnected using an autoranging Fluke meter. little strange not getting any response for resistance at Vsus.

what was the meter reading, 0?, OL?, 1?Maybe try continuity mode there on Vsus at SS11. Pin 1 Vsus, pin 3 gnd, pin 4 15V

That's all I can help you with on this I'm afraid, maybe try the same check at SN2 for resistance or short. Pin 1 Vsus, Pin 3 gnd

[Mud Digger]

Re: Sanyo DP50710 problem

Okay, I have all cables to the board disconnected, im using a snap-on EEDM503B meter, but i don't think it has auto range.. I was testing it on continuity and it was a little strange, would beep once then stop, and wouldn't beep again until I swapped the red and black leads, then would beep again and stop.. I tested this setting on a known bad board and the meter stayed on beeping showing a full short.. Well then I went back to resistance setting of 20M on the meter and tested again.. Now I'm showing 6.88 with the black lead on pin 3 (ground) and pin 1 (vsus).. As well as .001 with black on ground and red on 15v.

As I type this, I re checked and now showing 7.89 so it's climbing...

On the y board I'm showing: no results. Meter shows 1_.___ as if it's out of range or not connected to anything.. But if i flip the leads I get: -1.68

I removed the x completely from the unit (incase it was making contact somewhere) and tested it again, now I'm showing: 9.77 still climbing.. I'm confused lol

[tw2005]

Re: Sanyo DP50710 problem

Okay, I have all cables to the board disconnected, im using a snap-on EEDM503B meter, but i don't think it has auto range.. I was testing it on continuity and it was a little strange, would beep once then stop, and wouldn't beep again until I swapped the red and black leads, then would beep again and stop.. I tested this setting on a known bad board and the meter stayed on beeping showing a full short.. Well then I went back to resistance setting of 20M on the meter and tested again.. Now I'm showing 6.88 with the black lead on pin 3 (ground) and pin 1 (vsus).. As well as .001 with black on ground and red on 15v.

As I type this, I re checked and now showing 7.89 so it's climbing...

On the y board I'm showing: no results. Meter shows 1_.___ as if it's out of range or not connected to anything.. But if i flip the leads I get: -1.68

I removed the x completely from the unit (incase it was making contact somewhere) and tested it again, now I'm showing: 9.77 still climbing.. I'm confused lol

So am I but it sounds like they're not shorted and should be ok. Beep and charging is normal, It was just a longshot just in case it was something obvious.

What I like about the Panasonics though is at least you get blink code to give a clue.

Hopefully someone who has a bit more info on these will chime in.

[Mud Digger]

Re: Sanyo DP50710 problem

Hopefully, but thank you for your help so far! Wait, blink code?

[tom66]

Re: Sanyo DP50710 problem

When Panasonic plasmas have faults, the power LED will blink a number of times indicatng which part the fault was detected in. Very helpful, though sometimes misleading (4/10 blinks indicating power or A board can be SC board for example, 8 blinks indicating SS can also be SC, I've had a bad ribbon cable on C board cause 6 blinks which points to SC, etc.)

[Mud Digger]

Re: Sanyo DP50710 problem

Well I'm not getting any blinks, just solid green, then off.. I followed the link in your sig to toms manuals and found a similar unit and have been going down the list of testing. I'm having some trouble tho, when I'm looking for a short, is the continuity setting fine to use, or is ohms going to 0.000 better?

Also, I can't seem to find some of the locations like SU41.. And I think I found TPSC1 but it has a resistor there, is this normal? Thanks again!

[tom66]

Re: Sanyo DP50710 problem

That is what I meant / tw2005 meant. Panasonic plasmas and LCDs have these, but unfortunately Sanyo don't.

[Mud Digger]

Re: Sanyo DP50710 problem

Oh wow, I didn't even realize you guys were different people lol.. Sorry bout that.

Okay, maybe I just needed fresh eyes.. I found the SU41 and SD42. With SD42 unplugged the TPSC1 and base points are NOT shorted.. So then it led me to test C956 for resistance and it zeros out my meter.. C907 of the SU board is showing a steady climbing resistance.. So I'm thinking it's the lower SD buffer board that's bad. If you could over look my testing to the manual it would be awesome! Haha, thanks again!

[freakaftr8]

Re: Sanyo DP50710 problem

you can always remove the SD board and see if TV powers up course you have the top screen working only. Now being a Sanyo mainboard with Panasonic guts of course you're not going to benefit from Panasonic error codes

[Mud Digger]

Re: Sanyo DP50710 problem

According to the manual I've been using, it says, "removing any power cables to isolate a bad pcb will not work with this unit" so I don't think it'll work. But, I will sure try it anyway.