Maker Pro
Maker Pro

Samsung LE40B530P7W - NO POWER - BN44-00264C Rev 1.4 fault find

eddie1759

Jan 12, 2022
4
Joined
Jan 12, 2022
Messages
4
Hello, I just joined as I am looking for assistance and step by step guidance on how to fault find damaged components on BN44-00264C Rev 1.4 power board. Visual inspection has highlighted a burnt mark on the board to one side of item BM802. I am looking into replacing the damaged components if possible, otherwise would like confirmation if I need to replace the complete PCB, thank you in advance. Please refer to attached photo with the damaged component highlighted with yellow.
 

Attachments

  • Samsung H40F1_9HS BN44-00264C Rev 1.4 (1).jpg
    Samsung H40F1_9HS BN44-00264C Rev 1.4 (1).jpg
    226 KB · Views: 14

bertus

Moderator
Nov 8, 2019
3,304
Joined
Nov 8, 2019
Messages
3,304
Hello,

Can you post a close-up of that area?
Also a picture of the back of that area would help.

Bertus
 

eddie1759

Jan 12, 2022
4
Joined
Jan 12, 2022
Messages
4
Hello,

Can you post a close-up of that area?
Also a picture of the back of that area would help.

Bertus
Hello Bertus

Thank you for the contact and reply, as requested please see attached.
 

Attachments

  • Samsung.pdf
    219 KB · Views: 21

eddie1759

Jan 12, 2022
4
Joined
Jan 12, 2022
Messages
4
Hello,

The service manual seems to be able to download here:
https://elektrotanya.com/samsung_le...le46b530p7wxxc_chassis_n65a.pdf/download.html

Section 4 shows the trouble shooting.

Looking at the pictures, the black spot is likely made by the blue part CM806.
There is a hole in that part.

Bertus
Hello Bertus,
I have replaced the blue part, CM806 and also the ceramic fuse, T3.15AH250V. When connected and switched on, the fuse blow up, and when I checked the replacement fuse it was T3.15A600V. Do you think it is the wrong fuse or other components have fault? Thank you very much.
 

bertus

Moderator
Nov 8, 2019
3,304
Joined
Nov 8, 2019
Messages
3,304
Hello,

It sound as if there are still parts that create shorts.
It can be that some mosfets in the SMPS are bad.
Unfortunately the service manual does not have any schematics.
As for power checks it has the attached pages.

Bertus
 

Attachments

  • samsung_le32b530p7wxxc_le32b530p7wxxc_le40b530p7wxxc_le46b530p7wxxc_chassis_n65a PG 114-115.pdf
    638.3 KB · Views: 10

eddie1759

Jan 12, 2022
4
Joined
Jan 12, 2022
Messages
4
Hello,

It sound as if there are still parts that create shorts.
It can be that some mosfets in the SMPS are bad.
Unfortunately the service manual does not have any schematics.
As for power checks it has the attached pages.

Bertus
Hello Bertus,
Thank you for the attachment and information. I have bought a second hand complete board at a reduced priced from ebay, which I will receive soon. I will let you know the outcome when I fit it, thanks again and have a good day.
 
Joined
Sep 8, 2022
Messages
1

Hi,​

I've got the very same issue, on my board, I'm looking at CM806 being completely blown. With a multimeter, I found a bunch of connected components that's malfunctioning as well. I'm not sure if ICE3BR1065JF is roasted (any help on how I'd test this?). And would replacing the highlighted components hopefully fix the issue?

The data sheet is from https://elektrotanya.com/samsung_bn44-00264c.pdf/download.html
 

Attachments

  • Screenshot 2022-09-08 at 1.19.06 PM.png
    Screenshot 2022-09-08 at 1.19.06 PM.png
    87.9 KB · Views: 9

roughshawd

Jul 13, 2020
465
Joined
Jul 13, 2020
Messages
465
rule of handymans thumb... "if it was made by a computer, it can't be repaired by a human." However, I admire your desire! Good luck and I would say that if you have to ask me, I would have to tell you that when computers are employed to build something, they weren't designed to be repaired, and replacement is a guaranteed fix(unless there is something else wrong) .
 
Top