Hi,
It's not CCFL. All the CCFL had been tested with external control board, and all of them are fine....
retrorepair
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Last Activity: 03-07-2025, 04:58 PM
Joined: 01-17-2012
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SONY KDL-40P3600 Picture Problem
Hello gurus, hope you can assist me...
I have a Sony KDL.40P3600, with an issue on the left side of the screen (pictures attached).
I think the problem is the panel, but before send it to trash, i would like to get a second opinion.
Thanks in advance. -
Plasma TV LG42PX11
Hi,
I have here an LG plasma tv with a problem that I hope someone could lead me to the source.
The problem is, on bright images the screen flickers on and off. I don't have much experience working on plasma TV's, so I hope someone with more experience could give me some tips on what to look for.
Thanks. -
Re: Vizio SV422XVT blinking amber/white power light
Hi,
"I replaced 2 bulging capacitors on the main board in the DC/DC converter on the main board."
So you replaced the 2 caps that where bulging. If i where you, i would change all electrolitic caps in that board.Leave a comment:
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Re: LGP32-09P Power Supply Problem. Not getting 24V and 12V
Hi all,
Thanks for all the help that you gave me. This forum rocks.
I beginning to think that T101 is somehow bad.
The PSU works with all the voltages if i turn it on with a 1k resistor from 5V to PSON. If i do that, i get 5.1V standby, 24.06V on the 24V output and 12.1V on the 12V output. But i get this weird whinning on T101. In this circumstances if i put a load of 500 ohms on 12V, it drops to 11.2V and the 24V output rises to 25.6V. If i put a load of 500 ohms on the 24V, it stays...Last edited by retrorepair; 04-28-2020, 04:00 PM.Leave a comment:
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Re: LGP32-09P Power Supply Problem. Not getting 24V and 12V
Hi,
Unfortunately i had to deliver the other board(TV) repaired to the costumer. I don't have it now....Leave a comment:
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Re: LGP32-09P Power Supply Problem. Not getting 24V and 12V
Yes, tried everything. Standby voltage is Ok 5.1V steady.
14.8V on C507. No problem there....Leave a comment:
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Re: LGP32-09P Power Supply Problem. Not getting 24V and 12V
Hi,
Sorry for the delay, but have benn doing other equipments for costumers.
The standby voltage is stable 5.1V.
PFC VCC pin is 14V.Blocker/coupling cap C112 is bang on 47nF....Leave a comment:
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Re: LGP32-09P Power Supply Problem. Not getting 24V and 12V
Hi all,
Just a quick update.
Chenged all electrolitic caps, same behaviour.
Chenged all zener diodes, same behaviour.
I'll try to change IC500 who is responsible for generation VCC, because this voltage is a little low. If you have other clues for me, go ahead.
As soon as i replace IC500, i'll get to you.
Best regards,
RetrorepairLeave a comment:
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Re: LGP32-09P Power Supply Problem. Not getting 24V and 12V
Already did that with no changes....Leave a comment:
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Re: LGP32-09P Power Supply Problem. Not getting 24V and 12V
I've measure de VCC voltage on Emitter of Q501. Yes it acts like a switch. On the collector i'm getting around 16V more or less. I guess IC500(ICE3B0365J) is not working correctly, as i only get 12.9 volts on pin 7, and that voltage come from the same winding of T501 who is responsible for getting the correct voltage to the collector of Q501....Leave a comment:
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Re: LGP32-09P Power Supply Problem. Not getting 24V and 12V
Hi dick barton,
Thanks for the reply. Yes i have....Leave a comment:
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Re: LGP32-09P Power Supply Problem. Not getting 24V and 12V
Hi nomoresonys,
Thanks for you reply. I forgot to mention that i already checked the diodes(D104, D105, ZD101, D102 and D103 going to MOSFET's). All fine....Last edited by retrorepair; 04-19-2020, 03:34 PM.Leave a comment:
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LGP32-09P Power Supply Problem. Not getting 24V and 12V
Hi all,
I´ve been mostly a reader of this forum, and it rocks! But now i need help from you guys.
The TV arrived with only standby led lightning. I have found IC100 (L6599DTR) to be defective on the 24V and 12V power supply. Changed IC100. After changing IC100 i've got the following situation:
- Power supply has 5V Standby.
- TV sends signal to turn 24V and 12V on.
- Q501 turns on VCC.
- VCC is 14.8V.
- 12V reads 5.3V and 24V oscillates between.
- PFC is working (389V on C608).
What i've done so far:
...Last edited by retrorepair; 04-19-2020, 03:33 PM. -
Re: Acer AL1916W flash ccfl's
After all it was one of the ccfl's that went wrong...Leave a comment:
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Acer AL1916W flash ccfl's
Hi all,
This is my first post here. Hope to get some assistance...
I've this Acer AL1916W with inverter+power board DAC-19M008 BF Rev: 01A.
The problem is that ccfl's flashes once upon power on and then no backlight at all.
I already changed all caps, and checked all fuses. No one is open.
I think the problem is with feedback from backlight to IC200. I need assistance where to check for faulty components.
If i disconnect the backlight's one by one, the others stays on a little will (1s), then go dark....
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