Toshiba 40RV525RZ-No Power/Standby-Power Supply Help!

[ALR]

Re: Toshiba 40RV525RZ-No Power/Standby-Power Supply Help!

I believe I did that again last night and still got low readings??

Edit: I was up till about 3am with this thing so my memory was off. Just tested it and got 125-130DCV on the B+ and primary ground. That's the range we're looking for, right?

[ALR]

Re: Toshiba 40RV525RZ-No Power/Standby-Power Supply Help!

I tested the main caps again and one I got about 215DCV and the other one was just under 100 at about 90-95DVC Can only get about 300-306DVC and I know it should be 360DVC Is this norm, right on track with what it's suppose to do with the TVS out or another sign of something else?

[budm]

Re: Toshiba 40RV525RZ-No Power/Standby-Power Supply Help!

I need the DC voltage on the between the two test points that I have shown in the picture, B+ and the primary ground, it should be around 320~340VDC (if the AC input is 120VAC).

[ALR]

Re: Toshiba 40RV525RZ-No Power/Standby-Power Supply Help!

See post 61 I updated it and did it again, 125-130

[budm]

Re: Toshiba 40RV525RZ-No Power/Standby-Power Supply Help!

I tested the main caps again and one I got about 215DCV and the other one was just under 100 at about 90-95DVC Can only get about 300-306DVC and I know it should be 360DVC Is this norm, right on track with what it's suppose to do with the TVS out or another sign of something else?

"Can only get about 300-306DVC" so at which test point you are getting this 300~306VDC?

[ALR]

Re: Toshiba 40RV525RZ-No Power/Standby-Power Supply Help!

Tested the B+ and ground again and can only get up to about 95dc I tested the two main filter caps to get that. One was over 200 and the other one was under 100.

I still can't get anything on that 2 test point on the 120vac but I do get 120vac on the ac connector pads.

[budm]

Re: Toshiba 40RV525RZ-No Power/Standby-Power Supply Help!

You are not doing some thing right, what you are getting does not make sense at all and I am about to give up on this thread.
Since the lamp does not light up any more, I would say, put the new fuse in place, leave the TVS out and put everything back together and see if the TV will power up.

[ALR]

Re: Toshiba 40RV525RZ-No Power/Standby-Power Supply Help!

Nvm, I got up to about 350-355. Forgot to put the bulb on the fuse connectors.

[budm]

Re: Toshiba 40RV525RZ-No Power/Standby-Power Supply Help!

Good, put in new fuse and connect every thing back and see if the TV will power up.

[ALR]

Re: Toshiba 40RV525RZ-No Power/Standby-Power Supply Help!

Popped new fuse in and it didn't blow, however still no standby and won't power on with buttons or remote.

[tom66]

Re: Toshiba 40RV525RZ-No Power/Standby-Power Supply Help!

Just a note, I believe this TV uses a voltage doubler circuit for a half-bridge converter, so the total capacitor voltage should be 2x what you'd expect. The capacitors are wired in series. For the 230V models they omit one of the jumpers though I wouldn't expect them to sell a PSU like that in a 230V country as Europe (the biggest customer) is very strict about PFC.

[ALR]

Re: Toshiba 40RV525RZ-No Power/Standby-Power Supply Help!

I tested the DC side/connector to mainboard and got 5v fine but no 12v or 24v

[ALR]

Re: Toshiba 40RV525RZ-No Power/Standby-Power Supply Help!

Well. as you can tell I'm still learning and make mistakes but....Thanks to Bud Martin, I have successfully got the tv to power back on!! Batteries were dead in the remote they gave me, turned it on and got signal from buttons on the side.

I assume, replace that TVS and all should be good to go!! Thanks again for not giving up on the thread, I know it was a headache with the mistakes I was making. Thank you very much sir!

[budm]

Re: Toshiba 40RV525RZ-No Power/Standby-Power Supply Help!

Whew! Glad to hear. Can you read the P/N as printed on that shorted out TVS?

[ALR]

Re: Toshiba 40RV525RZ-No Power/Standby-Power Supply Help!

Yessir, p6ke220ca

[ALR]

Re: Toshiba 40RV525RZ-No Power/Standby-Power Supply Help!

[tom66]

Re: Toshiba 40RV525RZ-No Power/Standby-Power Supply Help!

Should be a good fit:
http://www.digikey.com/product-detai...FCT-ND/1530651

Nice to hear it's working.

[ALR]

Re: Toshiba 40RV525RZ-No Power/Standby-Power Supply Help!

Thanks Tom, looks perfect. Sucks shipping cost more than these parts lol

[tom66]

Re: Toshiba 40RV525RZ-No Power/Standby-Power Supply Help!

Can't really complain when you fix a TV for less than $5 though!

[ALR]

Re: Toshiba 40RV525RZ-No Power/Standby-Power Supply Help!

You got that right!!!! Bud saved me for real. I couldn't find a replacement board ANYWHERE. I have an LED tv with same issues that looks WAY different(SMPS) than anything I've seen yet and fuses are OK. May try to track that issue down tonight instead of ordering a board if I can help it. Just not sure Bud wants to help my confusing ass out anymore LOL