10 Sep
2021
10 Sep
'21
8:47 p.m.
Further review: Looking at photo IMG_6081.jpg it shows the layouts of
the boards. Specifically A1 is the pre-regulator board pn 5061-3457
which is the one with the caps and A2 is Inverter board PN 5061-3454.
I think if your PS doesn't work one problem is these boards are
backwards. Don't know if that will blow up your supply but interesting
to note...
Hm.... From what I can see it looks like the 120 goes into a transformer
on the bulkhead and is stepped down to 24 volts DC which then feeds
"stuff". I'll start there and see if I get 24dc at the first stage,
which should then be filtered by the caps and sent on to the various
regulators.
C
On 9/10/2021 11:41 PM, Chris Zach via cctalk wrote:
Hi Guy!
Thanks for the post and interesting. No it's not quite the exact power
supply but close. However....
Are you *sure* those cards are in the right slots?
Reason I am asking: When I look at the HP docs they label the
Pre-regulator board as A3A1. A3A1 also has the red LED. The inverter
board (the one with the transistors and transformers) is A3A2. Likewise
the battery charge boards are A3A3, A3A4, and the control board at the
end is A3A5.
The slots are labeled 1-5 with 1 being closest to the power cord and 5
being on the output end. A3A5 will only fit in slot 5, and A3A4 has the
12 volt trim pot that is accessible outside the supply by a cut-out so
it has to be in slot 4. Slot 3 is not used on my unit because I don't
have the battery backup circuits.
However in your picture slot 2 has the LED preregulator board and slot 1
has the one with the transistors and transformers (inverter). So either
your picture has the parts backwards or someone at HP should go to hell
for exceptionally bad numbering.
Does your supply work?
C
On 9/10/2021 12:43 PM, Guy Dunphy wrote:
> Here are some disassembly pics of a HP 5061-6615 power supply.
>
> ?? http://everist.org/pics/hp1000_ps/5061-6615.zip???? 2.9M
>
> Details:
> HP 1000 Model 2113E? SN 2340A03701? OPT 004? 014
> power supply? Model 5061-6615??? SN 2340
>
> Not the exact same PS as yours, but it might help?
>
> My problem is I haven't been able to find a manual and schematics for
> that
> apparently late model supply. Though last time I looked was years ago.
> The lack of a manual/schematics froze that restoration project.
> Can anyone suggest where I might find a copy?
> PDF, or I'd pay for an original paper copy. (To use, and also ensure it's
> scanned in high quality.)
>
> Guy
>
>
>
>
> At 09:30 PM 9/09/2021 -0400, you wrote:
>> Quick question: I've been cleaning out and repairing an HP5061 supply
>> for a 1000 computer. However I didn't take a picture of the 4 boards
>> when I pulled them and I want to make sure they go in the right places.
>>
>> ?From the manual (page 99 of 92851-90001_Sections-IXB_Mar-1981.pdf) the
>> slots are labeled A6-J1 through A6-J5. Does this mean that:
>>
>> J1 is the
>> J5 is the control board (A3A5)
>> J4 is a jumper board for +12 adjustments
>> J3 is unused (battery backup boards)
>> J2 is the inverter board (A3A2)
>> J1 is the pre-regulator board (A3A1)
>>
>> Seems right but I know how bad things can go :-)
>>
>> Thanks!
>> C
>>