No, when PSU/MB harness disconnected, the PSU is kept in standby.
It's not like the Samsung's when full backlight will be on when cable disconnect.
as long as you're sure, I had an old kdl sony from 2010 that does same as samsung, so it's NOT just the samsungs that self test in that manner, not saying you're wrong, just saying it isn't only samsungs that have that feature.
as long as you're sure, I had an old kdl sony from 2010 that does same as samsung, so it's NOT just the samsungs that self test in that manner.
I believe you, but in this case MB has to pull PS_ON to high at least to power up the power. It seems to be the case also for the BL_ON, but I cannot at all be sure without a service manual or other advice.
would probably have to test it as stand alone, using resistors, Diah knows a lot about that process, he helped me test my sony but I forgot the procedure, the memory is the first to go.
yours TV android. so MB need 12V always on like any android STB box / reciever.......to test the PSB als stand alone. you need external stepdown circuit but in case you don't have one. you can use the MB stepdown circuit. you need to unplug the socket between PSB & MB from MB side.. and just bring one wire from PSB 12V which STB and feed it to the assigned pins at MB socket. look after DC to DC on MB you will find the 3.3V there.. use it to power the PSB as you like.. don't forget BL_ON need DiM pin active too.
yours TV android. so MB need 12V always on like any android STB box / reciever.......to test the PSB als stand alone. you need external stepdown circuit but in case you don't have one. you can use the MB stepdown circuit. you need to unplug the socket between PSB & MB from MB side.. and just bring one wire from PSB 12V which STB and feed it to the assigned pins at MB socket. look after DC to DC on MB you will find the 3.3V there.. use it to power the PSB as you like.. don't forget BL_ON need DiM pin active too.
In this set, it appears MB only needs 3V3 as STBY.
I did disconnect cable between PSU and MB on MB side and pulling PS_ON and BL_ON to 3V3, but I never did with DIMMER so will try again.
New try:
BL_ON
PS_ON
DC_DIM
all connected to 3V3 does not generate any backlight.
always photo on the whole back and the PSU socket pins map will be helpfull if t-CON recieve 12V from PSU direct or via MB. if its from PSU then should have pins like T-CON on
12V T-Con is coming directly from PSU.
PSU generates +63V to dual boost converters to generate led backlight voltage. But boost converters are off.
No led is flashing.
PSU generates PFC voltage of 393V and 12V output is 12.7V.
STBY supply is 3.5V
so now its clear you have 3.3V STB.
STB- with Power On you will have REG12V this must be inplace to do further
STB with T_CON ON you will have T-CON VCC12V
STB with BL_ON will post BL
so now its clear you have 3.3V STB.
STB- with Power On you will have REG12V this must be inplace to do further
STB with T_CON ON you will have T-CON VCC12V
STB with BL_ON will post BL
PM Dimmer need R as its low or high
Todays test:
3V3 STB connect to PS_ON will make REG12V @ 12.7VDC
3V3 STB connect to TCON_ON will make T-CON @ 12.7VDC
3V3 STB connect to BL_ON does not change anything.
3V3 STB connect also to DC_DIMMER does not change anything.
I would suspect the boost converters to go active? At this point I have not applied anything to PWM DIMMER points.
Todays test:
3V3 STB connect to PS_ON will make REG12V @ 12.7VDC
3V3 STB connect to TCON_ON will make T-CON @ 12.7VDC
3V3 STB connect to BL_ON does not change anything.
3V3 STB connect also to DC_DIMMER does not change anything.
I would suspect the boost converters to go active? At this point I have not applied anything to PWM DIMMER points.
yours PSU look fine.. put all sockets as it should and capture the V on BL sockt between each group of LED+ & LED- at start up ( boot ) check the high and low messurments to compare the groups reading after you finish the test.
yours PSU look fine.. put all sockets as it should and capture the V on BL sockt between each group of LED+ & LED- at start up ( boot ) check the high and low messurments to compare the groups reading after you finish the test.
During boot, the maximum voltage applied from led driver is 63V (two outputs). I think I could power up each led group by a separate powersupply capable of 120V current limited ?
During boot, the maximum voltage applied from led driver is 63V (two outputs). I think I could power up each led group by a separate powersupply capable of 120V current limited ?
you have BL_error on the sockt. if its goes high at boot then you need to be ready for the hard work BL LED
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