Re: BN44-00301A No signs of life
Good news. The new IC did the trick, plus the zener diode was shorted.
Thanks for the great help.
Learned a ton from this repair.
Cheers....
snoptel
Member
Last Activity: 01-29-2023, 06:57 AM
Joined: 12-16-2021
Location: New York
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Re: BN44-00301A No signs of life
Confirmed, pin 4 and 5 are shorted, along with the other except for pin 1. I will source a new one and give you feed back. Hope I didn’t damage the pin holes :s
Sorry about the number of pages..
Thanks for the help.Leave a comment:
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Re: BN44-00301A No signs of life
Got it.
So on the VCC pin what should the voltage be?Last edited by snoptel; 01-08-2023, 04:37 PM.Leave a comment:
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Re: BN44-00301A No signs of life
Can you attach it please?...Leave a comment:
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Re: BN44-00301A No signs of life
Thank you for sending this.
I'm looking at the datasheet for the IC you requested. Doesn't look similar. The one on the board only has 6 pins...Last edited by snoptel; 01-08-2023, 04:01 PM.Leave a comment:
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Re: BN44-00301A No signs of life
Hmm, ok.
Do you have the schematic for this board?
CM801's number is 3BR1065JF...Last edited by snoptel; 01-08-2023, 03:54 PM.Leave a comment:
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Re: BN44-00301A No signs of life
Ah, ok...Leave a comment:
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Re: BN44-00301A No signs of life
I also wonder may CM801 isn’t working properly seeing as how there’s 320vdc and no outputLeave a comment:
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Re: BN44-00301A No signs of life
Earlier I asked about testing the board out of the TV because I was wondering if there I a signal from the ON button that would tell the PSU to start doing its thing. Is there a jumper that has to be installed somewhere??Leave a comment:
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Re: BN44-00301A No signs of life
Nothing. 0.001 VDCLeave a comment:
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Re: BN44-00301A No signs of life
Nothing, roughly zero volts DC.
I measured both forward and reverse bias.....Last edited by snoptel; 01-08-2023, 03:22 PM.Leave a comment:
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Re: BN44-00301A No signs of life
Sure, gotcha. not sure what the issue is then.....Leave a comment:
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Re: BN44-00301A No signs of life
Thanks for the help....Leave a comment:
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Re: BN44-00301A No signs of life
Not sure if I'm completely out to lunch here..
I measured the IC. Roughly 320 VDC where marked and nothing on the other pins. I referenced the negative from the 320 VDC when checking the other pins.
Ohh, and upon closer inspection, looks like the blue ceramic cap was replaced at some point....Leave a comment:
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Re: BN44-00301A No signs of life
Yes, the voltage drops almost right away after unplugging the cord.
Ok, let me go check CN801.
Be right back....Leave a comment:
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Re: BN44-00301A No signs of life
Haha, no worries. The cloth was just for the pic....Leave a comment:
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Re: BN44-00301A No signs of life
Confirmed, 316 VDC between positive and negative leg of each cap....Leave a comment:
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Re: BN44-00301A No signs of life
Ok, I will go do that right now.
FYI - The measurements I take have been with the PS plugged in standalone, in other words, it isn't plugged into the video driver board or anything else. Not sure if that matters.
When I was installed in the TV, nothing happens, no standalone light..nothing.....Leave a comment:
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Re: BN44-00301A No signs of life
Thanks again.
Is this the section that you are referring to?...Leave a comment:
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Re: BN44-00301A No signs of life
Thanks for the reply. I'm assuming you mean the blue cap right?...Leave a comment:
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