Re: LG 32lc46 totaly dead
just posted some pics up not very good though will get better tomorow dont know if you can see voltage regs to point out to me?
this is the exact board
http://www.sendz.co.uk/lg-42lf65-zc-...n-av-405-p.asp
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Re: LG 32lc46 totaly dead
The 1k resistor from 5Vstby to PS_ON test is to verify if the power supply is OK, which from your reports, the power supply is OK. Now you need to find out whay you are not getting the 3.3~5VDC from the main board to feed the PS_ON pin on the power supply.
Time to check the voltage regulators in the main board next.Leave a comment:
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Re: LG 32lc46 totaly dead
0 volts just re read what you had put so just tested it.
how i tested the new psu was just to connect a 1k resistor at pin 5 volt stby and ps on tested all voltage points at the psu connectors marked 24 volts 12 volts etc etc all correct.
so we are not getting the ps on signal from the main board
cant post pics up untill tommorow when i get mates camera but tell me what you want tested i will try to do it will post a pic up from my old camera as a idea of the main board for youAttached FilesLast edited by vinceroger69; 03-20-2012, 09:43 AM.Leave a comment:
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Re: LG 32lc46 totaly dead
No resistor attached, we just need to find out if you are getting the PS_ON signal from the main board, which I thought in the earlier post we had the PS_ON signal when you tested it. So you need to connect eveything back together.Leave a comment:
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Re: LG 32lc46 totaly dead
just to confirm i am testing this by placing a 1 k resistor as a load on the stby 5 volt pin and the ps on pin on the psu connector with no other connector connected just the mains lead i will take a voltage check in a min for you.
so i am not turning the tv on these voltages are from just the 1k resistor link across the pins
reads 2.92 voltsLast edited by vinceroger69; 03-20-2012, 09:21 AM.Leave a comment:
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Re: LG 32lc46 totaly dead
So what DC voltage do you get on PS_ON pin when you turnn the TV on?Leave a comment:
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Re: LG 32lc46 totaly dead
right a little update still have problems i managed to get a good working psu of a member on here but still have problems this is what i have done reassembled the set up with new power supply still dead no led on front nothing removed all connectors on the psu board except the mains lead put a 1k resistor on the stby 5.volt and ps 0n and got all the correct voltages on the psu board ie 12 volt 24 volt and a few other different volts but all spot on with board markings so now i persume the fault is on the main board? the one with the tuner on. will get some pics tomorrow for you. any ideas guys what to check next?Leave a comment:
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Re: LG 32lc46 totaly dead
You should use a "T" type fuse - Time Delay.Leave a comment:
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Re: LG 32lc46 totaly dead
That is normal. A regulator needs to be tested with an applied voltage. Replace it on the power supply board and test it later when the bridge rectifier arrives.Leave a comment:
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Re: LG 32lc46 totaly dead
before i order some fuses for the power supply are they fast or slow blow type?Last edited by vinceroger69; 03-19-2012, 08:25 AM.Leave a comment:
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Re: LG 32lc46 totaly dead
ordered the 2 items bridge rectifyer and 1 diode will put in as soon as they come and retest the supply.Leave a comment:
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Re: LG 32lc46 totaly dead
We are so close to find out why you are not getting the VCC to the PFC IC. Hopefully not much more damage is done to the original problem.Leave a comment:
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Last edited by vinceroger69; 03-18-2012, 01:37 PM.Leave a comment:
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Re: LG 32lc46 totaly dead
No - "UF" means "Ultra-Fast". 1N4007 is a "slow" diode. You need to replace it with a fast recovery diode.Leave a comment:
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Re: LG 32lc46 totaly dead
can the small UF1007 diode which is the other item short be replaced with IN1007 as i have loads also going to order the correct fuse for the power board is it a fast blow type? or slow blow type?Last edited by vinceroger69; 03-18-2012, 09:25 AM.Leave a comment:
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Here is a pretty crazy one.
Step 1.
Laptop was brought to me as dead not working. Removed everything , cleared everything.
Step 2.
Some liquid damage close to the Type - C connector, and the connector even though it was cleaned wasn't charging the battery . Removed the Type-C port, and replaced it. Now the laptop turns on and charges battery. Shows external screen , not internal.
Step 3.
Took out the screen and checked it to a secondary Gen 2 i have, screen works like a charm.
Step 4.
Lets ,dive into the board. I see the edp cable on the... -
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hello guys,
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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...
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