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dazzystar

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Last Activity: 01-13-2024, 08:02 AM

Joined: 12-20-2023

Location: London, London

dazzystar started a topic Samsung BN44-00517C PSU...identifying these zener diodes

in Troubleshooting TVs and Video Sources

01-13-2024, 03:28 AM
Samsung BN44-00517C PSU...identifying these zener diodes

Does anyone know what value these zener diodes are please on a Samsung BN44-00517C PSU board?

[ATTACH=JSON]{"data-align":"none","data-size":"full","title":"image.png","data-attachmentid":3177730}[/ATTACH]Does anyone know what value these zener diodes are please on a Samsung BN44-00517C PSU board?

[ATTACH=JSON]{"data-align":"none","data-size":"full","title":"image.png","data-attachmentid":3177730}[/ATTACH]...

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dazzystar replied to BN44-00517C dead - blown cap, resistor and fuse

in Troubleshooting TVs and Video Sources

01-11-2024, 09:57 AM
Can anyone help with what value(s) those zener diodes are please so I can order some replacements. Also, does anyone have a link to a circuit diagram at all?

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dazzystar replied to BN44-00517C dead - blown cap, resistor and fuse

in Troubleshooting TVs and Video Sources

01-08-2024, 12:16 PM
Yes. I saw that. Thanks....

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dazzystar replied to BN44-00517C dead - blown cap, resistor and fuse

in Troubleshooting TVs and Video Sources

01-08-2024, 10:37 AM
I've tried testing the diodes with my DMM. The only one I get any reading from is what I described earlier so I have no idea now what to try....

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dazzystar replied to BN44-00517C dead - blown cap, resistor and fuse

in Troubleshooting TVs and Video Sources

01-08-2024, 10:36 AM
Pin 5 doesn't connect to anything. I didn't take a pic beforehand....

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dazzystar replied to BN44-00517C dead - blown cap, resistor and fuse

in Troubleshooting TVs and Video Sources

01-07-2024, 12:59 PM
Thanks but it's my TV not a customers. Also that aliexpress board is NOT compatible with the TV. Shame. We'll take it to the recycling centre....

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dazzystar replied to BN44-00517C dead - blown cap, resistor and fuse

in Troubleshooting TVs and Video Sources

01-07-2024, 10:18 AM
so I have scraped around the area and the readings from all 4 diodes are the same as before. Is it worth repairing or should I give up?

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dazzystar replied to BN44-00517C dead - blown cap, resistor and fuse

in Troubleshooting TVs and Video Sources

01-07-2024, 07:39 AM
OK. I will check again soon and report back. Does it sound like number 1 is faulty as I get a sound and a meter reading in both directions?

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dazzystar replied to BN44-00517C dead - blown cap, resistor and fuse

in Troubleshooting TVs and Video Sources

01-07-2024, 07:10 AM
Thanks again. Does that mean the other 3 diodes are faulty?...

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dazzystar replied to BN44-00517C dead - blown cap, resistor and fuse

in Troubleshooting TVs and Video Sources

01-07-2024, 06:55 AM
From 1 I get a beep in both directions with my DMM and a reading of around 70 ohms. From 2, 3 and 4 I get nothing in either direction from the DMM

[ATTACH=JSON]{"data-align":"none","data-size":"full","title":"image.png","data-attachmentid":3174356}[/ATTACH]From 1 I get a beep in both directions with my DMM and a reading of around 70 ohms. From 2, 3 and 4 I get nothing in either direction from the DMM

[ATTACH=JSON]{"data-align":"none","data-size":"full","...

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dazzystar replied to BN44-00517C dead - blown cap, resistor and fuse

in Troubleshooting TVs and Video Sources

01-07-2024, 05:30 AM
No. I haven't. They seem to have 3 legs on them. How do I test with my multimeter?

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dazzystar replied to BN44-00517C dead - blown cap, resistor and fuse

in Troubleshooting TVs and Video Sources

01-07-2024, 04:59 AM
I should also add that when I plug the TV to mains power I hear the satisfactory 'click' from the PSU so something is better than what it was!

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dazzystar replied to BN44-00517C dead - blown cap, resistor and fuse

in Troubleshooting TVs and Video Sources

01-06-2024, 05:07 AM
Thanks but not sure which one(s) you mean. Here's a pic of the new PWM chip.

[ATTACH=JSON]{"data-align":"none","data-size":"full","title":"IMG_6078.jpg","data-attachmentid":3173857}[/ATTACH]...

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dazzystar replied to BN44-00517C dead - blown cap, resistor and fuse

in Troubleshooting TVs and Video Sources

01-05-2024, 12:17 PM
Well we replaced the PWM chip as well but still no joy. No standby light. So out of options now.

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dazzystar replied to BN44-00517C dead - blown cap, resistor and fuse

in Troubleshooting TVs and Video Sources

12-23-2023, 01:05 PM
Well I've ordered the part but I hope I can figure out how to fit it and it'll work!

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dazzystar replied to BN44-00517C dead - blown cap, resistor and fuse

in Troubleshooting TVs and Video Sources

12-22-2023, 01:39 PM
Thanks but I can't find them on ebay.co.uk

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dazzystar replied to BN44-00517C dead - blown cap, resistor and fuse

in Troubleshooting TVs and Video Sources

12-21-2023, 06:22 AM
Because I don't have one available and to buy just would be expensive, plus I don't have an SMD soldering station. So, if replacing the fuse, cap and resistor doesn't fit it and I can't get a replacement PSU board for little money in the UK then it's the bin for the TV which would be a shame.

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dazzystar replied to BN44-00517C dead - blown cap, resistor and fuse

in Troubleshooting TVs and Video Sources

12-21-2023, 03:37 AM
well then it will definately go in the bin after that!

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dazzystar replied to BN44-00517C dead - blown cap, resistor and fuse

in Troubleshooting TVs and Video Sources

12-21-2023, 02:56 AM
will change the broken parts and give it a go. cheers guys.

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dazzystar replied to BN44-00517C dead - blown cap, resistor and fuse

in Troubleshooting TVs and Video Sources

12-20-2023, 12:50 PM
It's a BN44-00517C by the way.

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