Hi all, I have a EBR73561201 Ysus board on a LG 60PV400 that clicks off after 2 seconds when powered up. I am 99% sure the problem is the YSUS board because when I power up the TV with it disconnected the tv stays on and I have tested the buffers and when the buffers are disconnected and the YSUS is powered the TV shuts down. I did replace a couple of FGPF4633 transistors that were shorted and tested all gate resistors but it still will shut down once I hook up the ribbon cable from the control board. I retested the transistors I replaced and tested the gate resistors and they seem fine. Anyone know where else to look on the YSUS board or what other components are replaced when purchasing the repair kits for these boards. Thanks
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Re: YSUS EBR73561201 clicking off on a LG 60PV400
I'm working on the exact same board right now. I fixed it before and it worked for 6 months. Check all the RF2001 diodes . Some are attached to heat sinks, a couple aren't. When I fixed this before, it was some RF2001's, Some FGPF4633's, some gate drive ICs (FAN73711) and there's some npn/pnp transistor arrays which were also bad. Can't remember the original PN, but I replaced them with CPH5506-TL-E. Both boards had issues. Right now I no longer am popping FETs, but still no picture or even pre charge flash. Both boards hum.Last edited by lookimback; 10-31-2018, 09:04 PM.------------signature starts here------------
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Re: YSUS EBR73561201 clicking off on a LG 60PV400
I found 3 more FGPF4633 transistors on the silver heatsink in the middle of the board that were shorted, I didn't see these at first because they were completely covered with the silicone goop. I replaced them and now the tv is working. I have tested it for over 30 minutes.....So far so good. I tested all the gate resistors and surprisingly they were good.Comment
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Re: YSUS EBR73561201 clicking off on a LG 60PV400
Good job! I found two bad resistors, and two more bad FGPF4633s on the Y smd Z boards, but I still have a short somewhere on the Y. I use a lightbulb in series with VS ro limit current so I don't blow the replaced FETs. It's odd because it lights dim, then goes out, and that's the expected behavior, but then about a second later the bulb comes on bright and stays on.------------signature starts here------------
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Re: YSUS EBR73561201 clicking off on a LG 60PV400
Checked them all. Last time some were bad, but not this time. I notice VSC is only 12v. Possibly it would be higher if I wasn't using the lightbulb limiter, but definitely still quite low.------------signature starts here------------
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PSU - BN44-00878A
Symptoms:
The TV turned itself off, and I haven't been able to turn it back on. The standby voltage was unstable and lower than it should be.
A weak clicking sound was coming from the transformer.
Video with clicking sound:https://www.youtube.com/watch?v=lAduhjNtqCA
Progress:
After the transformer, I measured four Schottky diodes. DM862C and DM864C diodes readings were 003 in both directions. After detaching them from the circuit and measuring them, DM864C was the shorted one. These Schottky diodes are SB550.I... -
LG42PC3D -UD originally with green lamp but no display or audio.
Owner says was working, then went 'pop'.
All 5V caps bulging. replaced.
All PSU output voltages within spec but -Vy is low on YSUS.
One of three parallel fets between SUS_OUT and SUS_DN is zenering,
eventually shorts DG. Replaced all 3 - -Vy now OK.
Y scan buffer test point does not follow YSUS output below -50V
Note: This unit seems to expect YSUS output to park at -Vy in between
drive signal pattern periods. A replacement drive signal board confirms this....11-18-2021, 11:49 AM -
Hello, I bought this Mac from a friend, he said that it simply stop working. The MacBook looks very clean but does not power on, stuck on 5v 0.42A, and sometimes display 5V and 0A (then 0.071A and again 0A).
I opened it looking for some problem, it was not touched before for sure and the board is very clena, no spot of corrosion at all from what I can see. Voltage on multimeter of the board off the case it's the same, 5V 0.42A. But then I noticed this "clicking sound" come from the board ( I attached here the audio file).
Looking on google I found this:... -
I gotten a Carver CM-1090 amplifier from a friend who has kept it in storage for decades. Opened it up, thick layer of dust cumulated everywhere. Vacuumed it semi-cleaned, and blown off as much as possible the remaining dust. This is a 220V version.
On initial powered up with nothing connected - it works with all the lights and button indicator lit up as pressed, etc. I then powered off, connected a CD player into the CD RCA input and powered it on. It seemed to work for a short while and when I turned the volume up and down to see the the VUs works, the power started to clicked off... -
Hello, i have this OLED here, as the topic says OLED65CX.
TV shows standby led, when pressed the PSU clicks, then shut down.
Disconnecting the 12V VIN from the T-Con, make the TV boot up, led flashes like normal and it stays on.
What i've tried so far:
I have a working TV, an OLED55C1. Similar TV... Took all the boards to the C1, 1 by one, and everything works. So basically, all of these boards from the defective CX (PSU, Main, TCON) works either 1 by 1, or together on the working C1.
However, none of the C1 boards work on the CX,...
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