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Re: Need help identifying this resistor (LG power supply)
The markings on the cap are "A/ R76 MKP" ".022 630" "U0 06MJE46" I'm guessing this is the correct one? http://search.digikey.com/us/en/prod...922-ND/2571356
EDIT: I did test the cap in the circuit. I get 22.33 nfLast edited by ecallenil; 03-10-2012, 01:27 AM.Comment
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Re: Need help identifying this resistor (LG power supply)
Perfect!
Even matches the color... lol!veritas odium paritComment
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Re: Need help identifying this resistor (LG power supply)
You're going to chance $12 in MOSFETs against a 50¢ cap????veritas odium paritComment
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Re: Need help identifying this resistor (LG power supply)
Got my order from Digi-Key today. I somehow managed to order the wrong cap. Being the impatient person that I am (not good to be impatient, I know.) I took the cap out and tested it with my multi-meter. It sill showed good so I stuck it back in along with the 2 new MOSFETs and the new resistor. I held my breath as I hit the button on the power strip and... nothing... a good nothing. I was half expecting to hear pops and see flames. The back-light came on and the lcd powered up. Everything seems to be working! I'll know more after I get some new thermal compound for the MOSFETs and leave it on a little longer.
I'm still getting a strange rapid flashing of the power led on the front of the screen blue/yellow but it's been doing that for about 1 year before it went out so I think that's unrelated. It doesn't affect the performance of the TV but it's kind of weird. Just wondering if anyone has seen that on a Westinghouse TV before?
Anyway, thanks to EVERYONE for their help! Special thanks to budm for all the help testing the MOSFETs and the IC.Comment
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Re: Need help identifying this resistor (LG power supply)
Also the failure mode of these metalised polyester film capacitors is for minute metal growths between layers, leading to shorts. However, these shorts may only become apparent when under the stress of a high voltage.
Glad you fixed your TV!
The blue/yellow flashing might be a software update, or a stray signal from another device that's being picked up by the IR?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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Vizio e601i-A3 - Has Sound and Display, But No Backlight - Bad Power Supply Board or Bad LED Bulbs ?I was given this TV from my great uncle. He said it just wouldn't turn on one day out of nowhere, replaced the TV, and gave it to me to possibly fix and use for myself.
Upon bringing it home and plugging it up, it showed a standby light.
I powered it on and without a flashlight, the display showed the "V" but the lighting is very dim, but visible.
The screen seems to blackout and stay black, but with a flashlight I can see the display.
With my Playstation 4 connected via HDMI, and running a game I can hear sound.
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I have wanting to do this project for quite sometime now and I finally found a switching power supply that will work on this desoldering gun station ZD-915 that the original switching power supply took a shit and just was not worth trying to fix it because this switching power is not quite big enough to handle the heater element and the vacuum pump
One note when I tested the switching power supply and the voltage control board I noticed that this desoldering gun heat up much faster than the original switching power supply which I was really surprised by to the point that I might buy... -
I have been working on this concept for quite some time now with limited success but recently I found a switching power supply that is setup for the voltage that this soldering station needs to operate at however it also needs part of the secondary circuit from the original switching power because you need several voltage rails
I once tried to get a ZD-915 desoldering station to work on a 18 volt battery power supply but unfortunately things did not go well but I did find a work around but I might try this idea again but going at a little differently more about this another time... -
The sub developed a constant popping every couple seconds from woofer and power LED flickering with nothing but wall AC connected. Connecting an audio cable didn't change anything. It doesn't play but a second or two of audio in between the pops.
Opened it up and discovered the power supply is making a faint clicking or ticking sound.
I measured the amp's output to the woofer and it pulses up to 50mv DC to be driver. The pulses coincide with the power supply ticking/clicking.
I measured the power supply output going to the amp board and it too has this pulsing. Voltage cycles... -
Hi
I am trying to repair an ancient Dell 2209WA Monitor which suddenly shut off with a pop sound. On investigation found that one of the fusible resistors had blown. Further investigation identified multiple components as faulty because of which the fusible resistor blew. Please refer the attached circuit diagram showing the components that were found to be damaged.
1. FR950 - blown fusible resistor - 0.2 Ohm 1W
2. Q950 - shorted Q950 MOSFET - 650V 10A N Channel Mosfet
3. R835 - Blown Resistor - 20KOhm SMD resistor
4. D930 - Shorted Schottkey Diode...
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