Re: Is it at all possible?

 PCB 326298-01 Schematic 326106

and compare that against this eagle schematic:
http://www.baltissen.org/images/c64.png

2017-02-14 21:37 GMT+01:00 Mike Stein <mhs.stein@gmail.com>:

> I've lost track; which board are we talking about?
>
> m
>
> ----- Original Message -----
> *From:* Bo Herrmannsen <bo.herrmannsen@gmail.com>
> *To:* cbm-hackers@musoftware.de
> *Sent:* Tuesday, February 14, 2017 3:34 PM
> *Subject:* Re: Is it at all possible?
>
> double checking stuff and for the resistors i found these odd's:
>
> Ruud's schematic lists R5 as 1.5 Kohm but the BOM in the service manual
> says 560 ohm
> R8  is a 1Kohm but BOM says 390 Ohm
> R10 is a 100 ohm but on BOM its a 120 ohm
> R31 is a 1Kohm but BOM says 180 ohm
> R37 is a 47Kohm but on BOM its 2,7Kohm
>
> R46 is on BOM but not on Ruud's schematic
> The following is on Ruud's schematic but not on BOM: R42, R36, R50, R48,
> R49
>
> will go on and recheck capacitors
>
> 2017-02-14 20:58 GMT+01:00 Bo Herrmannsen <bo.herrmannsen@gmail.com>:
>
>>
>>    - there are a few BOM's in the service manual at zimmers, i used the
>>    first one but maybe that is not the right one?
>>
>> I can answer this one myself... the schematic has only the 5 pin video so
>> its the first one board in the service manual. PCB 326298-01 Schematic
>> 326106
>>
>> 2017-02-14 20:35 GMT+01:00 Bo Herrmannsen <bo.herrmannsen@gmail.com>:
>>
>>> a bit back to the org subject
>>>
>>> BOM: https://docs.google.com/spreadsheets/d/1Gl0Q71u6fKLPRA9HQiSG
>>> 8-xY8tPweMwXuy_UGQ1Iayo/edit?usp=sharing
>>> Schematic: http://www.baltissen.org/images/c64.png
>>>
>>> Best photo of a board so far: http://myoldcomputer.nl/w
>>> p-content/uploads/2015/11/board-326298.jpg
>>>
>>> I have got most of the discrete stuff sourced, thou i have a few
>>> capcacitors i could not figure
>>>
>>> Q's:
>>>
>>>
>>>    - is mica and ceramic the same thing? i ask because i could not find
>>>    a few of the ceramics but could find them as mica's
>>>    - C106 is not on the BOM on page 22 in this PDF:
>>>    http://www.zimmers.net/anonftp/pub/cbm/schematics/compu
>>>    ters/c64/servicemanuals/C64_Service_Manual_314001-02_(1985_
>>>    Feb)%20.pdf
>>>    <http://www.zimmers.net/anonftp/pub/cbm/schematics/computers/c64/servicemanuals/C64_Service_Manual_314001-02_(1985_Feb)%20.pdf>
>>>       - but on the scematic on page 26 it is marked as 150pf but with a
>>>       dashed box arround it. I looked at the board i just linked and could not
>>>       find it anywhere. But can i assume that its just a ceramic?
>>>    - The socket for the expansion port is also a no go so far, anyone
>>>    know a shop that has them regular?
>>>    - L4 is listed as a line filter of some sorts, but could not find
>>>    any more info so far, anyone knows more about it?
>>>    - RP4 anyone know what kind it is? BOM at the zimmers link says 10
>>>    pin so can it be assumed that its 5 individual resistors?
>>>
>>> Things noted on the schematic from Ruud
>>>
>>>
>>>    - Only one of the resistors in RP4 is connected on both sides, do i
>>>    miss something here?
>>>    - Same for RP3
>>>    - there are a few BOM's in the service manual at zimmers, i used the
>>>    first one but maybe that is not the right one?
>>>
>>>
>>> Will do the chips tomorrow, rest of evening will be spent double
>>> checking and look a bit more in the service manual
>>>
>>>
>>> 2017-02-14 8:29 GMT+01:00 Julian Perry <jp@digitaltapestries.com>:
>>>
>>>> Hello GJPAA,
>>>>
>>>> Tuesday, February 14, 2017, 6:01:26 PM, you wrote:
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> *> Hallo Bo,>> First of all i wonder what board rev matches this
>>>> schematic?> I have no idea. The source is the schematic in the well known
>>>> Programmers Reference Guide.*As Hans has mentioned,  it looks very,
>>>> very close to Rev 250407. Nothing was ever absolute with Commodore boards,
>>>> but I think that's as close as you'll get. Commodore were always tinkering
>>>> with the analog video and audio (particularly early on) so there may be
>>>> some differences there.
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> *>> and if there are a high res scan "out there" i could use for
>>>> initial component placement> Write me in private and I will generate a PNG
>>>> with an higher> resolution. Or you can have the original files. Eagle can
>>>> be> downloaded and you can create your PNG. And you can tinker with the SCH
>>>> yourself.>> Next would part are ABSOLUTE not to be found no where? > These
>>>> parts aren't that rare. Just ask around.>> and board layout> Hasn't that be
>>>> done already? Several people have asked for the SCH before.*There was
>>>> the C64 reloaded a short while back ( http://wiki.icomp.de/wiki/C64_
>>>> reloaded ). Aside from cleaner video output I didn't quite see the
>>>> point: but it's always nice to see the C64 candle burning bright !!
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> *> Hmmm, next thought: what about using the ATX format? >> Next, how
>>>> much use would the work be in general?> Depends on your skills and
>>>> experience.> Met vriendelijke groet / With kind regards,> Ruud Baltissen*>
>>>> www.Baltissen.org <http://www.Baltissen.org>
>>>> <jp@digitaltapestries.com>
>>>> Message was sent through the cbm-hackers mailing list
>>>
>>>
>>>
>>
>


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