Fabio I have the pictures but I'm not using any kind of photo posting service it's gotten to complicated and I don't post much to forums anyway so can I send them to you and you can post them up?
Jim
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On August 3, 2018 at 7:26 AM Fabio Trevisan <fabio.tr3visan@...> wrote:
Hello Jim,
I owed and restored a 464 with DM44 (now given to a friend) and I don't think there are any other "optional" boards linked to the presence (or absence) of the DM44.
The only optional boards that apply to the 464 / 466 are:
A. The optional DC inverter board (option 7)... That one can't co-exist with the DM44 (the inverter uses the same windings on the main transformer that are used to power the DM44).
B. The composite video Sync Separator (Option 5), which bears some relation to the A5 sync board and could explain some changes.
I did hear once, from someone of this group, there was two versions of the A5 Sync board... one that used the Tunnel Diodes, and another one which used a Custom Tek IC to discriminate the trigger edge.
I`m not sure, but maybe this is what the -01 means...
I've never landed my eyes, however, on a schematic of the latter, or a later manual that included both.
But regardless of this board versioning, It seems rather odd to me that the connections to the J6 are disconnected, and more so, that there is no connection between the top and bottom side THROGUHOUT the board...
Moreover, there's nothing about the DM44 vs power to the A5 Trigger board... The DM44 takes its power from its own power supply and it's neither fed by the A5 board, nor the A5 board feeds it.
Yet, the only reason I can think of for the through hole plating is missing throughout the board is, either a mass murderer technician stripped them off by careless unsoldering, or yet, that it's a prototype board...
If it's the latter case, it could explain many things...
Maybe you can take a picture, post somewhere and link it here.
KRgrds,
Fabio
On Thu, Aug 2, 2018 at 11:40 PM, Jim Olson wrote:
I have a question about the A5 trigger generator sweep logic board
differences. I have two 466's with out the DM44 with the same trigger board
670-3324-00 boards. I have a 464 with a DM44 with the 670-3324-01 board and it
is vastly different from the 466 boards. All the DC voltage traces from J-6
are disconnected all the through holes are unsoldered so there is no
interconnection from top to bottom through out the board. There appears to be
no cable connection to the board from the DM44 to supply these?
The DM44 manual parts list's don't show that part number used for the 464/466
with the DM44 it shows the later 466 board and I can not find the optional
boards listed in the service manuals listed in the DM44 one.
The installation sheets for installing the DM44's don't list different or
optional boards used like the service manuals do?
So whats up with this bunch of missing info here!
Jim O
