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Last edited by chaplu; 09-04-2014, 11:31 PM. -
Re: LG 42PT350R Clicking Array
Do you have a short across any of the connectors on the Z, for example from VS to ERC?
(I can't recall what this set uses for its ERC node, but it'll be something similar.)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: LG 42PT350R Clicking Array
Hello Tom,
I will check the short between VS and ERC, for now i found that when i turn on removing cable between z sus and power board it looks like tv turns on without picture and sound but red light goes as if tv is on, and works with remote fine.
removing cable between z sus and y sus and letting power connected to z sus do the similiar clicking thing on and off.
One more thing i tested is when i turn it on i get 5v but i don't get vs or va on z sus if that helps.
Thank you for you valuable support.Comment
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Re: LG 42PT350R Clicking Array
Its short between vs, er and gnd.
This should be done on diode mode on multimeter with tv having no power right?Comment
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Re: LG 42PT350R Clicking Array
Yes... so you will have a shorted IGBT/FET on there or on the Y-sustain..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: LG 42PT350R Clicking Array
so that means to replace again igbt and mosfet drivers as well? again n again ?
Comment
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Re: LG 42PT350R Clicking Array
It's a case of replacing everything at once on these I'm afraid... or it won't work.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: LG 42PT350R Clicking Array
ok
so replacing igbt and drivers on both boards wil work? by the way short is present when y sus is disconnected from z sus. so zsus seems shorted again because of y-sus ? hmmm.
What i understood from your guidance:
Need to replace igbt and drivers on both boards at once? how to check if everythings fine before turning on?
Thank you Tom Once again!Comment
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Re: LG 42PT350R Clicking Array
Hi chaplu.
What is your finding regarding this ibgt short problem..Comment
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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... -
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... -
I have a UN60D8000YF with a BN44-0432A power supply and a BN41-01622C main board.
The set was working then not,then started clicking.
Wilth the power supply disconnected from the main board I can occasionally get it to power the LED back lights , getting it to stop clicking is luck.
Checked caps and diodes and mosfets the best I could. When it stop clicking there is 5v and 18v on the connector to the main board.
A schematic or suggestion would be great.
Thanks -
LG 60PB66550 NOV 2014
PSU: EAY63168603
PCB: EAX65359531 2013.11.01 Rev:1.0
Main board: EAX65399305(1.0) 13.11.27 PU42A/PA42A/PD42A
Symptom:
While watching, just went black and started clicking relay every few seconds.
Initial diagnosis:
Removing JUST the main CPU/Input PCB from circuit stops the clicking. No problems with any other boards/drivers. (Removing all other boards and only putting Main back in is all it takes to start clicking again)
Deeper diagnosis:
Pulling pins #1/#2 (Blue/Grey) from the connector housing...
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