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Philips 47PFL7403D/10
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Re: Philips 47PFL7403D/10
Is this the same board?
http://www.shopjimmy.com/philips-272...pply-unit.htm#
Philips 272217100571 (2300KEG033A-F) Power Supply Unit.
MFR Part Number 1: Philips 272217100571
Board Number(s): 2300KEG033A-F, PLHL-T722A 2722, 171 00571
Substitute Parts: 272217152611, 272217100571 Repair Kit
R5 is used to supply B+ (rectifiers D101A~D) to run the standby SMSP IC U101, once the TV is power sup, the B+ will be then supplied by the main power supply through D160, 160A., once the main power supply relays are on then R5 is no longer in use, if B+ through D160,160A is not present and the main board will try to pull full current from STBY supply, then R5 will burn up, that R5 is used just enough to supply enough current to run the main board through R5, once full power is required, R5 is no longer used in the circuit due to reverse bias of D101A~D.
So something is drawing too much current through R5 and causes it to burn up, U101 is one of the load.
The RCD snubber for the U101 is OK? The rectifiers D111 in the cold side is OK? D101A~D, D160, 160A OK?Last edited by budm; 02-20-2017, 05:56 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 47PFL7403D/10
Thank you Budm.!
The part number of the board is exactly the same as you mentioned.
Board number is PLHC-T801A(UD)
Does Philips sell repair kits for this board? (272217152611, 272217100571).
D101A~D have been replaced. D160 & D160A are good.
Also there have been replaced:
> D111
>Pc201
>Pc102 & 101.
After all these, relay clicking and after a minute again R5 is blown again.
Snubber you mean GR8? the small transformer?
If you mean the transformer I checked it with blue ring tester. Primary is fine but secondary is bad. Is it a problem?Last edited by vazaki; 02-24-2017, 11:26 AM.
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Re: Philips 47PFL7403D/10
RCD snubber;
D106A
R104
Blue disc cap C120?? next to R104.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 47PFL7403D/10
Checked the c120 it should be 10nf but I measure 5,5nf.
I will try to desolder the transformer and measure it again.
To give circuit a try I have to reorder again U101
What about d106a? The type of this diode is T2D 83. Checking with multimeter is seems open both sides. Is it normal situation? I tried finding specs but i didnt find anything. Is it a high voltage diode?
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Re: Philips 47PFL7403D/10
It is back to back diode so you cannot test it with your meter.https://www.badcaps.net/forum/showthread.php?t=43724Never 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 47PFL7403D/10
The small transformer is desoldered.
In the primary it has two windings. Both tested with blue ring meter and both are good.
The secondary has one winding, tested but according to blue ring meter it is bad.
Is it possible? The transformer seems in very good condition without signs of burnt or smell.
Any opinions?
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Re: Philips 47PFL7403D/10
I don't know, but i'm not sure about the value of R5, if the fourth band would be yellow and the third purple it was 1,27M but it would be strange for the use, if the fourth would be gold the value is not 120ohm but 12,7ohm or 12ohm (third black)... i expect very rarely the transformer going bad.. whatch shopjimmy picture, it has 5 bands.. i don't even know why this resistor is there..!! But i'm not expert.. finally, i've already seen resistors with band with a strange gold colour..Last edited by Davi.p; 02-28-2017, 04:00 PM.
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Re: Philips 47PFL7403D/10
Originally posted by dskall View PostTry powering it up without transformer thru light bulb for fuse see if board is still shorted. What is resistance of secondary?
I have to order again fsq510 to test it with light buld.
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Re: Philips 47PFL7403D/10
Originally posted by Davi.p View PostI don't know, but i'm not sure about the value of R5, if the fourth band would be yellow and the third purple it was 1,27M but it would be strange for the use, if the fourth would be gold the value is not 120ohm but 12,7ohm or 12ohm (third black)... i expect very rarely the transformer going bad.. whatch shopjimmy picture, it has 5 bands.. i don't even know why this resistor is there..!! But i'm not expert.. finally, i've already seen resistors with band with a strange gold colour..
I agree with you about transformers gooing bad but is this an exception?Last edited by vazaki; 03-01-2017, 12:13 PM.
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Re: Philips 47PFL7403D/10
About R5: since the most outer band is green, the first to count is the brown, please watch shopjimmy picture, the R104 near the little transformer T101, seems to have 2 types of yellow, like many other circuits i've found, i think the darker one is a yellow that stands for gold, so you have brown, red, brown, gold, green then 12,1ohm. Start from this.. why R5 blew i don't know..
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