Another PS3 PSU mod

[m111920]

I have another PS3 power supply LSEB1226B1 model.

Some time ago, I have successfully modified output from 12V to 13.8V
https://www.badcaps.net/forum/showthread.php?t=33197
With help of members,it was really easy to do.

This supply is a little bit different, there are four photocouplers just like APS-231, but I did not find three pin regulator which is connected to "12v reg" photocoupler like in APS-231 model before.

Please see the pictures.

[m111920]

Re: Another PS3 PSU mod

Two chips are M34509G4 and LSSK87
first one is SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER,wtf?

http://www.datasheetdir.com/M34509G4+download
it seems that this is some kind of PWM..

[m111920]

Re: Another PS3 PSU mod

bump

[m111920]

Re: Another PS3 PSU mod

Still bumpin'

[stj]

Re: Another PS3 PSU mod

what's the ajuster in the top-left?

[m111920]

Re: Another PS3 PSU mod

It does nothing

Here is some update:
IC markings;:
1: TD
2: TAIG
3: 3418

[m111920]

Found it

it's on top side of PCB, now from this point, we need huge resistor, more than 100K ohms and connect it between this point and ground, voltage will rise till about 15V then OVP kicks in.

Merry Christmas fellas