Laserwriter II AC Power Supply

[retro_bill]

Just got a new Laserwriter II AC power supply.

Did apple make changes to the power supply once they noticed so many failures?

I ask because if you look at my replacement power supply you can see the is a small circuit board missing and I want to confirm the new power supply should have the board missing.

Here are pics of the original and new power supply.

Thanks

Bill

 

[Johnnya101]

Yes, changes were made by I think it was Canon or HP that made them. The original 1987 Apple one I pulled out of mine has no small board. I would check the newer replacement, but it is currently installed. You should be fine.

EDIT: Actually, it is not a small board, it is part of the supply. I forgot I took the board out of mine to clean and recap it. My original would have had that extension. It is very possible they made revisions, as that is the board that had the failures. Is there a board under that silvery metal plate? If so, you are good to go.

 

[retro_bill]

it has the circuit board that plugs into the printers motherbard

 

[Johnnya101]

No, I mean directly under that metal shield in the photo. There should be a PCB of some sort under there. The part that plugs in is on the other side.

 

[retro_bill]

There is some board in there as I can see the green under the screw. I guess we will find out when I power up the printer after I get the new fuser

 

[joeventura]

I have two of these that need repair, be happy to pay someone to fix them

 

[ScutBoy]

These are part numbers for power supplies that will work in the II series - at least they did for me. Since the same supply was used in HP Laserjets they are not hard to find on the 'bay, etc.

Once you get the power supply sorted out, then you can start to find out what rollers, guides, etc. have either turned to goo or dried up, and replace accordingly!


RG9-0205
RG9-0319
HP SX-ACPM-B

 

[joeventura]

I have the parts, need them repaired,
Know the part numbers thanks
and Ive sorted all other issues, the printer works flawlessly except for the PS