Z50PJ240 Powers on then back off clicks but no picture

[soog35]

Re: Z50PJ240 Powers on then back off clicks but no picture

What should that diode read?

[tw2005]

Re: Z50PJ240 Powers on then back off clicks but no picture

visually it looks fine but I get 00.7 on that resistor.

Then it should be the same across the diode then D304, they're in parallel to each other. Where did 266 come from then.

[tw2005]

Re: Z50PJ240 Powers on then back off clicks but no picture

What should that diode read?

In diode mode could be o.5-0.7 . Which one are you probing and I'll tell you mine.

[soog35]

Re: Z50PJ240 Powers on then back off clicks but no picture

Checked the diode in diode mode and the resistor in ohms

[soog35]

Re: Z50PJ240 Powers on then back off clicks but no picture

testing the YSUS
grd to VS is 3.37
grd to VA and grd to 5v starts out about that but starts dropping
don't see 15 v
What is yours?

[tw2005]

Re: Z50PJ240 Powers on then back off clicks but no picture

Help me here, put some units in like ohms or kohms (K) or Mohms(meg) or is it in diode mode?

If Vsus to gnd is 3.37 ohms on the ysus connector, it's stuffed or shorted?

[soog35]

Re: Z50PJ240 Powers on then back off clicks but no picture

Mohms

[soog35]

Re: Z50PJ240 Powers on then back off clicks but no picture

What should it be?

[tw2005]

Re: Z50PJ240 Powers on then back off clicks but no picture

If Mohms then that's what i expect, Mine's about 3 meg vsus, 4meg Va and 5v is not steady but 1.5meg or so. They're not short, that's all I was concerned about.

So buffers not shorted, ysus power in not shorted, probably all you can establish apart from the zsus power in from the ysus.

All going well the PSU sorts it out, at least it won't be presented with a short cct when it comes on.

[soog35]

Re: Z50PJ240 Powers on then back off clicks but no picture

OK Thanks. Hope the PSU will fix it.

[tw2005]

Re: Z50PJ240 Powers on then back off clicks but no picture

On my ZSUS P1 - gnd

1,2. 15v - gnd 2.7meg
3,4 5v -gnd . 3.4meg
5. gnd
6. OE - gnd 2.8meg
7. Z-bias 4.7k
8. SLOP-CTRL 4.7k
9. Z.ER 4.7k
10. SUS_DN 4.7k
11. SUS_UP 4.7k
12. GND

connector P2
1,2 gnd

3 n/c

4,5 Vsus 13.5 meg - gnd

6 n/c

7,12 ER 5.8-6meg - gnd

[soog35]

Re: Z50PJ240 Powers on then back off clicks but no picture

Can't figure out how to check that correctly. On P1 do put 1 lead on pin 5 and check all the other pins?

[tw2005]

Re: Z50PJ240 Powers on then back off clicks but no picture

yep, blk on gnd or an earthing lug nearby I used. Checked gnd to lug 0 ohms

[soog35]

Re: Z50PJ240 Powers on then back off clicks but no picture

I'll try again, seemed way off compared to yours.

[tw2005]

Re: Z50PJ240 Powers on then back off clicks but no picture

If the board is out flip it over the pin labels are underneath too. the legend on top for one of those is covered with a big blob of silicone so I could not read the pins that way.

[soog35]

Re: Z50PJ240 Powers on then back off clicks but no picture

On P1
1. 1.9meg
2. 1.06meg
3. nothing
4. nothing
7 through 11 1.22meg

On P2
on 4 and 5 2.5meg
on 7and 12 2.1meg

[tw2005]

Re: Z50PJ240 Powers on then back off clicks but no picture

On P1
1. 1.9meg
2. 1.06meg
3. nothing
4. nothing
7 through 11 1.22meg

On P2
on 4 and 5 2.5meg
on 7and 12 2.1meg

Well that's interesting, so different except pins 1&2 on P1 are the same conection should read the same. I'll try mine again later, not an exact science doing this, no shorts that's a positive.

[soog35]

Re: Z50PJ240 Powers on then back off clicks but no picture

I may take the board off and check it again tonight, going on 7am here have to be at work at 8 so I don't have time right now. Been up all night checking this thing...lol

[tw2005]

Re: Z50PJ240 Powers on then back off clicks but no picture

I may take the board off and check it again tonight, going on 7am here have to be at work at 8 so I don't have time right now. Been up all night checking this thing...lol

Crazy stuff, but I've done silly things like that. It's just a TV, don't lose to much valuable sleep over it.

[soog35]

Re: Z50PJ240 Powers on then back off clicks but no picture

TW and TOM
I got the new PSU but haven't installed yet. The D304 diode seems to be open, so this could be defective. I have a pic of the diode and a video link of me testing it. Do you guys think this would give me trouble if I install this as is. I don't want to mess up anything else. I still have a good diode I could replace it, or maybe I need to send it back. Does it look bad to you guys?


http://www.youtube.com/watch?v=q-U5mcdy2kA