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B&W power motherboard PS connector

Message #1 - Posted 2007/05/06 - bob

My B&W PS has reached its last milliwatt.
It does not want to supply power for more than a few minutes. I want to swap it out for an ATX supply, with more wattage.

I know there are PS connector differences, searching the net, I find a number of xclr8 your mac articles about G3 B&W and G4 PS swaps but I am confused by the info provided. One article implies that pin 8 (PG on ATX, +3v on G4 AGP/PCI Mobo (sawtooth) and maybe on B&W is not a worry. Pin 18, grnd on mac, +5V on ATX is the worry. I am worried about the pin out period.

Can someone pint me towards or fill me in on what the real wiring is on the B*W G3 motherboard? Is it the same as the Sawtooth? Or point me to a service manual (user and tech manuals don't seem to cover this) thanks!
bob

Message #2 - Posted 2007/05/07 - Erik Richard S?rensen

Hei Bob

You can get these tech manuals from me. Just send me a note with a valid =

return address. Send mail to <mac-man_NOSP@M_stofanet.dk> remove _NOSPM_ =

to activate the address.

- And one question. - Have you checked the fuse - both the one at the=20 back at the buttom of the cabinet and the one located on the PS itself?=20 - These two fuses sometimes can corrodate, so they switch off after some =

minutes...

Cheers, Erik Richard

bob wrote:

My B&W PS has reached its last milliwatt.
It does not want to supply power for more than a few minutes. I want to swap it out for an ATX supply, with more wattage. =20
I know there are PS connector differences, searching the net, I find a =

number of xclr8 your mac articles about G3 B&W and G4 PS swaps but I am=

=20

confused by the info provided. One article implies that pin 8 (PG on=20 ATX, +3v on G4 AGP/PCI Mobo (sawtooth) and maybe on B&W is not a worry.=

=20

Pin 18, grnd on mac, +5V on ATX is the worry. I am worried about the pi=

n=20

out period.
=20
Can someone pint me towards or fill me in on what the real wiring is on=

=20

the B*W G3 motherboard? Is it the same as the Sawtooth? Or point me to =

a=20

service manual (user and tech manuals don't seem to cover this) thanks!
bob

--=20
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Rgds. Gr=C3=BC=C3=9Fe, Mvh. Erik Richard S=C3=B8rensen, Member of ADC <mac-man_NOSP@M_stofanet.dk> <http://www.nisus.com> NisusWriter - The Future In Multilingual Textprocessing ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Message #3 - Posted 2007/05/08 - bob

Erik Richard S=C3=B8rensen wrote:

Hei Bob
=20
You can get these tech manuals from me. Just send me a note with a vali=

d=20

return address. Send mail to <mac-man_NOSP@M_stofanet.dk> remove _NOSPM=

_=20

to activate the address.
=20
- And one question. - Have you checked the fuse - both the one at the=20 back at the buttom of the cabinet and the one located on the PS itself?=

=20

- These two fuses sometimes can corrodate, so they switch off after som=

e=20

minutes...
=20
Cheers, Erik Richard
=20

Erik,
Thanks, I did check the whole machine, the 200 watt supply was a little=20 but under what was needed for the memory 1GB, 1GHZ G4 Cpu, with much=20 cache, 4 disk drives, DVD burner, and option cards. The original supply=20 just got tired. I have been slowly and carefully replacing it with a=20 550Watt supply - plenty of reserve power I will never use - but before I =

test to see if the magic smoke comes out, I want to make sure the wiring =

is correct.
bob

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