Bob,
First off, we need to know which 805: "A" or "B". From the part #, you have
either an "A" or an early "B".
Second, I would remove the crystals from the sockets and solder them in. Use a
sharp pair of cutters to cut away the plastic
socket and then solder the crystal to the pins sticking up from the board
paying attention to the orientation. Observe all static
protection protocols.
Also, it is possible that it was set up for 8 channel audio. Depending on the
installer, certain stops would go to channels 3 & 4,
(which are normally not used) and you would not hear any audio from those stops
unless another set of
amp and speakers was connected. You can try a set of headphones to bypass that.
I'm attaching a voice allocation chart for the A & B so you can get tell which
board or chips are not working.
The reason no credit is given for returning a board is that most often failures
are caused by lightning. This can cause a lot damage to these static sensitive
boards.
(ALL circuit boards from this era are very static sensitive, not just Rodgers.)
This would cause problems down the line, so it is
safer to have a brand new board.
Also, the cabling and plugs on these boards can cause problems. Be very
careful when unplugging and plugging in these cables.
Replacement cables are available, but are also expensive. If the top of the
cage is still there, remove it and plug the cables
directly into the boards, if it then works, you found the problem. The top has
parts that help isolate and stop voltage surges
and it can be damaged. You can operate the organ without the top board, but
you will lose that added layer of protection.
Sam DeGeorge
-----Original Message-----
From: John Birdsong <dmarc-noreply@xxxxxxxxxxxxx>
To: rodgersorgan <rodgersorgan@xxxxxxxxxxxxx>
Sent: Tue, Jul 25, 2017 7:34 am
Subject: [rodgersorganusers] Re: Got DVM board?
Swap the EPROMs between the suspect board and another DVM. If there are any
DIP switches (I forget), be sure to change them too. Put both boards back in
and try the organ. If the board itself is bad, the formerly dead stops will
now be working and a new set (whatever is produced in the new slot to which you
moved it) will be dead. Then you will know for sure that the board is the
problem.
Hey, it might even fix it, just pulling and re-seating all the EPROMs.
Sad commentary on the state of affairs that this board costs so much, and that
they don't even offer any credit for a returned bad board. You'd think they
would want to be repairing and re-cycling these boards, the stock of which must
be very small and dwindling rapidly.
John Birdsong
jbird604@xxxxxxx
-----Original Message-----
From: Bob Mollard <bobaton@xxxxxxx>
To: rodgersorgan <rodgersorgan@xxxxxxxxxxxxx>
Sent: Tue, Jul 25, 2017 7:18 am
Subject: [rodgersorganusers] Got DVM board?
Hello all. I have a used 805 with the following stops not speaking:
Ped: Princ 16, Bourd 16, Choral bass 4, Schalmei 4
Great: Princ 8, Koppel 4, Quint 1 1/3, Cromorne 8
Swell: Bourd 8, Cymbale III
When I first got it, DVM board 5215-303 was showing red, and I assumed
that it was bad. My dealer found a salvage board in his pile of parts,
but it showed red also. Recently I moved it for a concert and noticed
all boards were showing green, but those stops remain silent. My dealer
offered to sell me a new board at his cost, but to our dismay he
discovered his cost from Rodgers was $2800! I'm just not going to spend
that kind of money for one board, especially since I'm not 100% sure
that's where the problem is.
So do any of you have thoughts regarding diagnosis, and if I do indeed
need a DVM, does anyone have a line on a good one that doesn't cost more
than the organ is worth? I am technically capable, but I do not have a
service manual.
Thanks!
Bob Mollard, MM AAGO
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