Mastero MK-4 ATX PSU with features. - Page 14

Mastero · 08-22-2004, 05:25 AM

Quote: Originally Posted by Soul

When i hook up the GND and the +12v off the car battery i hear a relay click (probably the big one) and the red LED lights up but the light is really low.

I measured the LM7805 input and its only 1.8v that is comming from the LM741 ic

I got a 12.9v on the +12v track

Its ok .. if its low ... ones the voltage drops in the input section then you have bright red ...

MAstero

Soul · 08-22-2004, 11:10 AM

Quote: Originally Posted by Mastero

Its ok .. if its low ... ones the voltage drops in the input section then you have bright red ...

MAstero

I connected the acc line and the red led was still low, when i switched the acc on nothing happend is this normal ?

Mastero · 08-22-2004, 12:25 PM

Quote: Originally Posted by Soul

I connected the acc line and the red led was still low, when i switched the acc on nothing happend is this normal ?

Please explain your exact connection...

MAstero

Soul · 08-22-2004, 12:40 PM

Quote: Originally Posted by Mastero

Please explain your exact connection...

MAstero

PSU is powered on car battery (12.9v engine not running)
ACC is connected also.

When i put the GND and the +12v on the PSU i get a low red led and hear a click of a relais.
I shortcut the kill switch (KS) and nothing happens.
Then i switch the the ACC on and nothing happens.

Mastero · 08-22-2004, 03:23 PM

Quote: Originally Posted by Soul

PSU is powered on car battery (12.9v engine not running)
ACC is connected also.

When i put the GND and the +12v on the PSU i get a low red led and hear a click of a relais.
I shortcut the kill switch (KS) and nothing happens.
Then i switch the the ACC on and nothing happens.

Does your yellow led go on ...? with the click of the relay ...?

Mastero

Soul · 08-22-2004, 03:24 PM

Quote: Originally Posted by Mastero

Does your yellow led go on ...? with the click of the relay ...?

Mastero

yes for a second it goes on then off again
when i connect gnd and + to the supply

Mastero · 08-22-2004, 03:27 PM

huh ok ... turn the 105 pot ....... and see if the yellow lead stays on ...

Soul · 08-22-2004, 04:05 PM

yep yellow led stays on now

when i hit the kill switch it goes off and when i turn the pots the other way (not the 105) and hit the kill switch it stays on.

MatrixPC · 08-23-2004, 12:20 AM

Soul go to Mastero website and look for the instruction how to configure/operate the SDC. But if you only need to test the PSU operation, put a jumper on J1 to bypass the SDC part of the board.

Soul · 08-23-2004, 12:09 PM

lol just found it
The switch that i used for the ACC line was broken i tested it before (with multimeter) and it worked but when i wanted to use it on the PSU it died on me.

Thanks all for the help

Maddog_rvo · 08-24-2004, 12:22 PM

i`m having a problem too, inside on a carbattery everything works fine, input is 11.7V if i put it in my car the input is 12.7V then the 5V line drops to 4.3V and the rest stays the same. if i connect it with a thin wire i measure about 11.8 on the input and it works fine again, everytime it gets above 12V input the 5V line drops till as low as 4.3V

Somebody knows why?

Maddog_rvo · 08-25-2004, 05:33 AM

pls help me with the problem, cant seem to find it, no short circuits with the cooling blocks

Xavyer · 08-25-2004, 07:59 AM

Quote: Originally Posted by Maddog_rvo

i`m having a problem too, inside on a carbattery everything works fine, input is 11.7V if i put it in my car the input is 12.7V then the 5V line drops to 4.3V and the rest stays the same. if i connect it with a thin wire i measure about 11.8 on the input and it works fine again, everytime it gets above 12V input the 5V line drops till as low as 4.3V

Somebody knows why?

A litle clarification.

When maddog powers his MK4 op on 12V it works just fine, but if he hooks it up to the carbattary the 5V line drops from 5,02V to 4,29V. I mentioned that it could be a isolation problem of the chips and/or MBR's but according to Maddog this wasn't the case.
He tested this with a multimeter before hooking it up

I'm thinking of a bad MBR, but theoreticly this wouldnt be a problem because the 5V line works just fine when the PSU is hooked on a stable 12V power supply. Could it be one or both of the regulator chips?

Maddog has one of the "full" kits I bought from Mastero

Maddog_rvo · 08-25-2004, 08:30 AM

Just found something extra, at 14V input the PS works with a very small load (1hd + mobo) the 5V line is about 4.8V and as soon as it really starts booting (reading from HD) the 5V drops to 4.3V again and the PC reboots

Mastero · 08-25-2004, 11:10 AM

Quote: Originally Posted by Maddog_rvo

Just found something extra, at 14V input the PS works with a very small load (1hd + mobo) the 5V line is about 4.8V and as soon as it really starts booting (reading from HD) the 5V drops to 4.3V again and the PC reboots

Could you post some close up ...picture ...

Mastero