HItachi P50T01UA plasma PSU Murata MPF7722

[nogger]

hi All, just got one of these in for repair & trying to figure out how to power this PSU up on the bench. Searched the forum but can't find anything on the PSU OR the TV.

One connector has the following pins STB5v, GND, STB3.3, POWEROFF,AC CLOCK,POD-STBY,REC-STBY. The STBY5v & STBY3.3 are present & correct.
A second connector has : Vcc5.1,GND,STBY3.3,VCEG0,VSAG0

triedthe usual tricks STBY to GNDetc but nothing clicks. There's no PS_ON as far as i can see just the POWEROFF.

Before i go experimenting thought i would ask on here. As usual no circuit info in the manual.

Cheers
Graham

[steviewonder]

Re: HItachi P50T01UA plasma PSU Murata MPF7722

Yes,not come across one of those psu's so far.i would assume poweroff is the same as p-on?

[nogger]

Re: HItachi P50T01UA plasma PSU Murata MPF7722

That's what i thought but seem's not, tried all combinations but doesn't switch it on. Have to see if i can find a manual.

Graham

[fzabkar]

Re: HItachi P50T01UA plasma PSU Murata MPF7722

The Hitachi DW3-A chassis pinout for CN63 is ...

1 STBY+5V -->
2 GND
3 STBY+3.3V -->
4 Power Off --> only high momentarily when AC removed
5 AC Clock -->
6 Power1 <--
7 Power2 <--
8 NC

Therefore ISTM that 6 and 7 could be the power control pins.

[nogger]

Re: HItachi P50T01UA plasma PSU Murata MPF7722

Haven't had a chance to test this yet, will have a go tomorrow & let you know.

Graham

[fzabkar]

Re: HItachi P50T01UA plasma PSU Murata MPF7722

Electrotanya has several service manuals for the DW3-A chassis. Perhaps one is more complete that the others.