Hi,
I was looking for the schematic of an Antec Phantom 500watt or a comparable scheme
The PSU was builded around a L4981AD as a PCF
On the bulk cap must i found a voltage of 400V
The voltage is now 318V (thus no powerfactor)
Ac input is here local 230VAC
Vcc became from a transistor and voltageregulator 7812 voltage is 11.8V
Vcc measure is 10.3V
Vcc input current was about 8mA
The transistor base cames from a optocoupler
On the primairy side the voltage is -7.2V
Secondary side about 11.5V
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zeha
New Member
Last Activity: 09-26-2018, 05:56 AM
Joined: 06-05-2010
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Re: Samsung Syncmaster 245BW
a mistake again?
If so sorry for that..
I can't check it.
LCD is back to the owner.
Harrie... -
Re: Samsung Syncmaster 245BW
Hi all,
a while ago i posted the schematic from the power supply. (drawn by my own)
I asked to give me backup information about values and partnumbers.
I have make a mistake by the voltage on the marked point M and B
This must be 392V instead of 292V
Here is the newer version.
Any additional information is welcome.
[url]https://www.badcaps.net/forum/attachment.php?attachmentid=28987&stc=1&d=1313322597[/url]
HarrieRe: Samsung Syncmaster 245BW...Leave a comment:
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Re: Samsung Syncmaster 245BW
Hello,
Thanks to Cloepula.
My monitor is fixed.
In my case only QM802 an resistor RB805 defect.
I have drawn the cuircuit by my own.
It missing something because i can't read or meassure the parts.
Somebody to complete this?
Cheers
Harrie...Leave a comment:
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Re: Samsung Syncmaster 245BW
I have the same monitor and i have the same problem.
Resistor RB805 burned, QM802 also have a open circuit.
If ICM801S (Fuji Electric controller f9222l ) is working, I don't now.
Question:
Is there a way to measure f9222l?
Can i meassure with not connecting the invertor board?
I have tryed with a temporely NPN transistor (BC547B) with a 10 omh resistor on base.
No luck to get power on PCF4863G (pin 8 close to zero volt)
Can i be sure to buy a new f9222l IC
Thanks...Leave a comment:
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