Re: Samsung LN32A330J1D - BN44-00191B No secondary No Standby Sort of
The transformer rewinding photos
The transformer rewinding photos
Attached Files
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Re: Samsung LN32A330J1D - BN44-00191B No secondary No Standby Sort of
anyone?Comment
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Re: Samsung LN32A330J1D - BN44-00191B No secondary No Standby Sort of
Were you able to test the DCR and the inductance of the winding before rewinding of that Gate drive transformer? Same wire gauge used for the rewinding?
It may be that rewinding did not come out the same as original so the drive circuit in ICM801 gets hot.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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Re: Samsung LN32A330J1D - BN44-00191B No secondary No Standby Sort of
Well ..i used the same wire minus 1 turn for each coil in the same direction as the original.
The wire was fine only one coiil was corroded at the exit point where it was soldered . Beside my efforts winding was not perfectly alligned by hand
I guess this changed a bit the inductance.
I could not measure anything except continuity .Last edited by strs156; 09-26-2017, 03:22 PM.Comment
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Re: Samsung LN32A330J1D - BN44-00191B No secondary No Standby Sort of
Hey friends , I just came in here, cause I'm fixing this psu, from a friend of mine. I cleaned all the glue which was oxidising many components, a transistor near the main cap, QB802 transistor full of this sticky shit.
I realised RM801 has been heated up and it showed around megohm value, on the schematic says it should be 220ohms , so I replaced just to test with 2 50ohms in parallel , but as soon as I plug everything it starts to heat up in flames.
What could be posibly wrong, should I use some freeze spray to check for the shorte component on either side of RM801? can I inject some voltage?
thanks!Comment
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Re: Samsung LN32A330J1D - BN44-00191B No secondary No Standby Sort of
RM801 is 0.22 Ohms!
You need to also check both MOSFETs in that section.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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Re: Samsung LN32A330J1D - BN44-00191B No secondary No Standby Sort of
It is used as slo-blo fuse.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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I had a Dead Samsung UN65MU6300FXZA with Mainboard BN94-12440E
Dead / No Power / No Standby Light results after power company had three
consecutive power outages on/off/on/off/on/off after which TV was rendered unresponsive.
After exploring the issue found Mainboard was the fault. Then with research on this site determined IC1604 was the suspect. The IC1604 is a surface mounted device (SMD) EEPROM, Winbond Model 25Q40CLSIP. A read on this EEPROM came back with all FF FF FF FF FF in all registers blank and empty of data. I had a spare mainboard with intact IC1604 and utilized... -
No standby red light, nothing
This Sony has a separate AC->DC power adapter supplying 19.5V to the TV power board (JK3)
Disconnected JK3 power board from main board, checked voltages on all the pin outs
At a few pins I can see the power supply providing 19.5V to the main board
Based on the service manual triage.. it seems to be pointing towards the power board (JK3) being the most possible culprit
LED light turns on when I disconnect LED driver board ribbon from mainboard (so i thought it is the mainboard,... -
Hi All,
Need help.
I have a samsung un60j620dafxza led tv. When I plug it in it has no display, no sounds, and no standby lights.
So I opened the tv and disconnected the power to the mainboard and the backlight powered up. This according to many people says that this is a mainboard
problem. I checked the voltage coming from the stb and I read 1.3 volts on pins 1,3,5 and 7 which are low volts instead of 13 volts which i think the lcd panel
might be drawing too much power from the power supply that it prevents the right voltage going to the mainboard.... -
This is my first attempt at troubleshooting a board like this, I know I could just buy a new board but I'm curious to figure out how this works. I've been testing different components in the evenings this week and I think the problem is with the IC failing to start up for some reason. When the board is plugged in there is no standby voltage.
Then today it randomly sprung to life like a zombie but shortly died thereafter. I have no idea why it would have done that and its the first time I've seen it running. I discharged capacitors on the board last night, then it was sitting today.... -
Hi everyone,
I've got a little "problem child": my Dell Latitude 7420 2-in-1, which had a faulty mainboard.
I replaced it, but ever since, the touchscreen no longer works — and honestly, I’m running out of ideas…
In Windows Device Manager, I just see an I2C HID Device with error code 10. Sporadically, the touchscreen is recognized correctly for just a few seconds, but I haven’t been able to determine under which circumstances this happens.
The touchscreen also doesn’t work in UEFI/BIOS, although it’s enabled...
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