Hey Guys, this tv has no power. There is no light on the front indicating no 5v. I tested for P-ON+21V on power supply, there's only 11.63v and on the AMP+13V rail, there's only 6.40v. To me, it seems that this power supply is running at half the voltage. Any ideas?
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Philips 39pfl2608/f7 no power
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Re: Philips 39pfl2608/f7 no power
Originally posted by 1beertap View PostHey Guys, this tv has no power. There is no light on the front indicating no 5v. I tested for P-ON+21V on power supply, there's only 11.63v and on the AMP+13V rail, there's only 6.40v. To me, it seems that this power supply is running at half the voltage. Any ideas?
As you can see, there is no standby power supply, the power supply is always running but not at full output Voltage until it gets the PS-ON from the main board.
Right now the power transformer driver circuit in the primary side is working so there is no need to probe anything in the primary side.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=24809
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Re: Philips 39pfl2608/f7 no power
BTW, there should be labels for the connector pins on the bottom side of the board.
There are jumpers with ALL_3.3V, that is your standby Voltage, you should have that Voltage.
There are more than one version of this model as you can see here:
http://www.shopjimmy.com/catalogsear...lips+39pfl2608
I cannot read the numbers as printed on the two white stickers on the power supply to match with pictures of the board as shown at SJ.
The blank PCB of your board is BA31T0F01 02 2.Last edited by budm; 08-09-2016, 09:42 PM.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=24809
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Re: Philips 39pfl2608/f7 no power
What DCV do you have on jumpers:
P-ON-H2
PROTECT3
BL-SWNever 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=24809
Comment
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Re: Philips 39pfl2608/f7 no power
Originally posted by 1beertap View Postbudm,
I tested these with reference to a chassis ground screw.
P-ON-H2 = 0.0v
PROTECT3 = 0.0v
BL-SW = 0.0v
Thanks.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=24809
Comment
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Re: Philips 39pfl2608/f7 no power
You need to cut the PROTECT3 jumper J258 (the one closest to the connector) that goes back to the connector, do not jump the Voltage to the PROTECTION3 or you will damage the LED driver ICs.Last edited by budm; 08-11-2016, 09:08 PM.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=24809
Comment
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Re: Philips 39pfl2608/f7 no power
Originally posted by 1beertap View PostI cut PROTECT3 jumper J258 and the tv did not come on. Also, on one side of the now cut J258 reads 2.4v and the previous test points read P-ON-H2 = 0.0v and BL-SW = 0.0v
Do you know the history of this TV?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=24809
Comment
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Re: Philips 39pfl2608/f7 no power
OK, read pot 40 and on to see how we force on the power supply and the backlight circuits.
https://www.badcaps.net/forum/showth...ROTECT3&page=2Never 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=24809
Comment
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Re: Philips 39pfl2608/f7 no power
Originally posted by 1beertap View PostIf i have 3.3v for standby, would this still not make the standby led on the front of the TV come on?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=24809
Comment
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Re: Philips 39pfl2608/f7 no power
budm,
The backlights are on a long as I have power plugged in. Using three 1k resistors jumped from 3.3v to BL_SW, BL_ADJ and P-ON-H2. The connector is unplugged from main board. Unlike the other member's thread, PROTECT3 does have 3.1v on it.
I see in the comments you say if the PROTECT 3 signal is OK, then we will need to look at PROTECT 1 signal. What voltage can I expect to see on it?
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