Re: Please help for schematic for this PCB DA41-00757A
Thx Lotas you found it, its only 0,8 Ohm so this is smoked. Now how to find the part? i trying to serch online for this transformer but no luck...
Competty
Member
Last Activity: 03-06-2023, 04:12 PM
Joined: 02-16-2023
Location: Far vest
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Re: Please help for schematic for this PCB DA41-00757A
Is it possible transformer is shorted? I desolded the transformer and messured all pins and get 0.1 ohm on the pins, i dont have any info on the transformer...Leave a comment:
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Re: Please help for schematic for this PCB DA41-00757A
Ok i got it but i dont have 15V or 5v on Reg2 or Reg3 or Reg1...Last edited by Competty; 03-06-2023, 11:03 AM.Leave a comment:
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Re: Please help for schematic for this PCB DA41-00757A
I change the parts and powered up the pcb, some reason i got 320v in the red marked area
almost everyware on the board except REG1 area
Following parts is replaced:
C102
TOP245PN
D103
Reg2 AND Reg3
SLA680MP
Any idea whats going on?...Last edited by Competty; 03-06-2023, 10:21 AM.Leave a comment:
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Re: Please help for schematic for this PCB
No short whiteout the driver ether....Leave a comment:
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Re: Please help for schematic for this PCB
I did a measurement on the pins you marked to GND and no resistance on any marked pins. Gonna remove the driver and do it again. Do i need to replace SMD resistor when they show 200K instead of 300kohm regarding the schematic?
I don't have a PSU, gonna order it today.Last edited by Competty; 02-20-2023, 06:06 PM.Leave a comment:
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Re: Please help for schematic for this PCB
you just killed that joy i had a moment ago, all R505-516 shows 200kohm (300kohm is the correct value) and R502 is blown away, ZD501 shows 0.121v and RK49 diode at 0.161v.
So is this dead or should i putt some effort on it and give it a try?
or do you mean the main board as well?...
Last edited by Competty; 02-20-2023, 04:50 PM.Leave a comment:
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Re: Please help for schematic for this PCB
Thx for the replay, i ordered SLA6805M and TOP245P/startup cap and lucky me
wiring schematic as well 
i uploading it in case some poor fellow ends up in same matters.
I will update soon as i got the parts.
Many thanks for all help....Leave a comment:
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Please help for schematic for this PCB DA41-00757A
Hi there,
I'm stuck whit this board, trying to find the issue why the motor controller on the heat sink is blown up (I'm at the early stage of troubleshooting so go easy on me) the fuse blown up as well, the big cap needs to b replaced and some diodes/SMD resistors or probably more stuff.
PCBs ID is DA41-00757A and its mounted on a Samsung Freezer Model:RZ90FABB
I'm following a Youtuber about troubleshooting PCB and find out some of the parts value is incorrect so i need to order new parts.
Which website is best match to order parts for PCB in Europe and please some... -
Re: New Members - please post your introductions here
Hi there, I'm a 50 years old buck and happy to be here, my daily job is water treatment for pharma application. I fall in love for home device repair under pandemic time, when my dish/laundry and graphic card died at the same time.
I'm still learning.Leave a comment:
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