Re: Phillips 42PFL3704D/F7 Dead
Suspect Q1602?
Suspect Q1602?
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Re: Phillips 42PFL3704D/F7 Dead
Should download the service manual:
Chassis FL9.2?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: Phillips 42PFL3704D/F7 Dead
Ok got it downloaded but not very good at reading circuits yet.Comment
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Re: Phillips 42PFL3704D/F7 Dead
Tested Q1203 per manual
3.3m 2.1ohm 6.1kComment
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Re: Phillips 42PFL3704D/F7 Dead
Remove from circuit to confirm.... looks dodgy.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: Phillips 42PFL3704D/F7 Dead
269k 2.1 ohm 110k out of circuitComment
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Re: Phillips 42PFL3704D/F7 Dead
would that indicate a gate to drain short?Comment
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Re: Phillips 42PFL3704D/F7 Dead
Do you think the 2.1 ohm is a problem? I tested the other exact same fet and it did not show a 2.1 ohm short.Comment
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Re: Phillips 42PFL3704D/F7 Dead
Yes, it's bad.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: Phillips 42PFL3704D/F7 Dead
Replaced the Fet still no change. What should the input/output voltage be on the Bridge Rectifier? When I test Ac voltage from the neutral to the center pins I have 0 VAC Its almost as if the voltage is not getting to the Bridge RectifierComment
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Re: Phillips 42PFL3704D/F7 Dead
Because the relay isn't kicking in, the relay only kicks in if 5VSB is up (check 5V standby output) and main board turns it on.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: Phillips 42PFL3704D/F7 Dead
No standby voltage is present.Comment
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Re: Phillips 42PFL3704D/F7 Dead
Ok I tested all diodes on the PSU. All are around .537 on direction and OL the other. There is one Diode D1101 that tests 0.79 one way and 1.5 the other direction. Meter set to Diode test setting.Comment
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Re: Phillips 42PFL3704D/F7 Dead
OK, it is one of those 2-transistor switching power supply that when it goes out, lots of components are damaged (check all those parts real well in the red box I marked). Check the fusible resistor I circled, and check the DC voltage right at the two legs of the cap I circled.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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Hi all,
As the title suggests, how can I be sure that my EC chip is really dead?
I've recently gotten into this hobby of laptop repairs, and have successfully brought back to life a couple with some easy fixes, mostly shorted caps.
Now I'm working on HP Probook 455 G8, that had some "devil" run around on 3V line, burning a bunch of stuff. Luckily I have a dead 455G7 (for spare parts) so I managed to fix it (swapped burned parts) to a point that it will charge (both on barrel jack and usb-c), but it doesn't want to turn on. There is a 3V3 on a keyboard... -
hello guys,
i need help to repair a edm-033 ps2
history : as always hdmi port and usb ports destroyed after unplugged
after change them, ps5 dead too : 1 beep, no blue light. after inspection 1.8v power was shorted, and because of dead panasonic chip. after remove it : no short anymore
so i changed it
now i have got 5v stby,, 3.3v stby, 3.3v power, 1.8v power and no short on them
but the ps5 is dead again : 1 beep, near 10 seconds with power lines and then off, no blue light ...
i don't see any projection of liquid metal on pcb.
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Hi guys!
I searched for the term "dead short" in the forum but no specific thread came up however if I'm just blind and couldn't see the thread talking about this please forward me to that direction.
So my problem is I don't know how to find the source of a dead shorted voltage rail. Dead short = ~0 ohm resistance.
I have two VGAs (HD 4850 and HD 4870), both dead shorted to ground on the memory rail. I have the boardview file for the 4870 and the memory rail consists around ~7892346 capacitors...
I have a bench PSU and if I try to inject voltage the voltage... -
Hello everyone hope all doing well!
I have this PSU (GPS450-AA delta oem) around for like 4-5 years and I had it recapped early 2020 or 2021 with mostly UCC KY and Nichicon PW's. The bulk was and still is fine, the original Ltec's were bloated and empty. The previous issue was some major coil whine noise and at times random shutdowns when going idle. Today it started tripping the mains breaker and I think I have dead APFC mosfets (20N60C3). Right now upon checking I have the Q1 and Q3 FETs dead so far and I guess those are responsible for the PFC circuit. The only thing I care is If there... -
Hello, today I'm working on this lovely MSI Raider GE75 gaming laptop which I bought to flip. Unfortunately, I believe the CPU is toast but I wanted a second opinion before I chucked it into my spare parts bin. I will not have most tools with me today as I'm away from my workbench but I have the basics (a good multimeter, a horrible iron, a solid screwdriver, and my trusty thermal cam). I do not have the original 230w charger, but I have a Dell 180w which was sold with the device and reportedly "worked fine for them".
Specs: I7-10750H, RTX 2060, 32GB RAM (unknown manufacturer)...
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