245BW, can't find problem. No 24 or 6.3V, standby is good.

[smason]

Re: 245BW, can't find problem. No 24 or 6.3V, standby is good.

That cap circled in blue, it MIGHT be bad? I can go higher in the uf rating right?

Umm no, if that's the startup cap, you should replace it with the same value as what's there now.

[epicelite]

Re: 245BW, can't find problem. No 24 or 6.3V, standby is good.

Well I don't know what it is but I replaced it with the exact same type.

One here for $4
http://www.audiolabga.com/data_html/STR.html

Can't get it to accept my postal code for shipping calculation though.

[PlainBill]

Re: 245BW, can't find problem. No 24 or 6.3V, standby is good.

Nope it still doesn't work, I refuse to pay $10 for a single IC. >:|

Especially when it's not guaranteed to be the problem.

I understand how you feel. There are very few options at this point. I have been unable to locate a schematic for this power supply.

With an oscilloscope and isolation transformer we could determine if the IC is 'live' or not.

The symptoms do not match a shorted output diode, but that could be tested. It is the large diode mounted at a diagonal to the right of the standby transformer.

Replacement power supplies are available for under $55.

PlainBill

[PlainBill]

Re: 245BW, can't find problem. No 24 or 6.3V, standby is good.

Well I don't know what it is but I replaced it with the exact same type.

One here for $4
http://www.audiolabga.com/data_html/STR.html

Can't get it to accept my postal code for shipping calculation though.

Strange. Where are you located? And have you tried contacting them either by email or telephone?

PlainBill

[epicelite]

Re: 245BW, can't find problem. No 24 or 6.3V, standby is good.

Well it's too late to call today so I guess I will send a e-mail and try calling tomorrow.

EDIT: Well now I have to fix this monitor ASAP. I got my Dad a new video card and it won't work with his CRT for some odd reason.

[Toasty]

Re: 245BW, can't find problem. No 24 or 6.3V, standby is good.

Google: CP08515F

SearsPartsDirect.com: $2.16
PartStore.com: $2.18

[epicelite]

Re: 245BW, can't find problem. No 24 or 6.3V, standby is good.

How do you know that's the same thing?

[Toasty]

Re: 245BW, can't find problem. No 24 or 6.3V, standby is good.

http://www.audiolabga.com/data_html/STR.html

[PlainBill]

Re: 245BW, can't find problem. No 24 or 6.3V, standby is good.

http://www.audiolabga.com/data_html/STR.html

Well done!!!

PlainBill

[epicelite]

Re: 245BW, can't find problem. No 24 or 6.3V, standby is good.

I ALREADY FOUND THAT, check out a few posts up.

[Toasty]

Re: 245BW, can't find problem. No 24 or 6.3V, standby is good.

Try reading it this time.

[epicelite]

Re: 245BW, can't find problem. No 24 or 6.3V, standby is good.

That didn't do anything besides waste $8.

[PlainBill]

Re: 245BW, can't find problem. No 24 or 6.3V, standby is good.

That didn't do anything besides waste $8.

Hold it. Something is seriously wrong here. I've been dealing with the same power supply on this thread. The title of this thread indicates you have standby power. In post 1 you said the power light was on, that would indicate the standby supply was working....

Awww, crap!!! I'm sorry, I confused the S_B output with the 5.4 main output. Well, we're going to be following an existing trail.

First question: Does the power LED respond when you hit the power button - turn on and off?

If it does, the second question is: Does the voltage across the 82uF, 450 volt cap jump up to over 350 volts when the power LED is on?

PlainBill

[epicelite]

Re: 245BW, can't find problem. No 24 or 6.3V, standby is good.

Hold it. Something is seriously wrong here. I've been dealing with the same power supply on this thread. The title of this thread indicates you have standby power. In post 1 you said the power light was on, that would indicate the standby supply was working....

Awww, crap!!! I'm sorry, I confused the S_B output with the 5.4 main output. Well, we're going to be following an existing trail.

First question: Does the power LED respond when you hit the power button - turn on and off?

If it does, the second question is: Does the voltage across the 82uF, 450 volt cap jump up to over 350 volts when the power LED is on?

PlainBill

Yeah power light turns on and off, and I guess I could check that. I will get back to you.

[epicelite]

Re: 245BW, can't find problem. No 24 or 6.3V, standby is good.

ON: 422V
OFF: 168V

Volt meter on the 1000V setting.

SO YOU'RE SAYING I SPEND $9 FOR THAT NEW IC AND SHIPPING AND IT WAS FOR NOTHING!? >:|

EDIT: Oops double post. :|

[PlainBill]

Re: 245BW, can't find problem. No 24 or 6.3V, standby is good.

ON: 422V
OFF: 168V

Volt meter on the 1000V setting.

SO YOU'RE SAYING I SPEND $9 FOR THAT NEW IC AND SHIPPING AND IT WAS FOR NOTHING!? >:|

EDIT: Oops double post. :|

Yes.

The next step is to measure the voltages on the main SMPS controller - ICM801. Set your DMM to the 20VDC range, use pin 4 as the ground point, and measure the voltages on every pin of the MC33067P. Report the readings.

PlainBill

[epicelite]

Re: 245BW, can't find problem. No 24 or 6.3V, standby is good.

Ugh it has like 20 pins!

[PlainBill]

Re: 245BW, can't find problem. No 24 or 6.3V, standby is good.

Ugh it has like 20 pins!

Only 16. And I'm only asking you to measure the voltage on 15 of them.

If you would prefer, the power supplies are available on eBay.

PlainBill

[epicelite]

Re: 245BW, can't find problem. No 24 or 6.3V, standby is good.

Well whats pin 1 and whats ground?

[PlainBill]

Re: 245BW, can't find problem. No 24 or 6.3V, standby is good.

Well whats pin 1 and whats ground?

Package designation here. Note the notch at one end, some manufacturers have a dimple by pin 1.

Use pin 4 for the ground point of the DMM. Perform the tests with the monitor plugged in, and the power led on (you may have to hook the monitor up to a signal so the monitor doesn't go into standby.

PlainBill