Ampliphone FAQ Comments

I've just finished fixing my first Ampliphone. Thanks to both Dan Todd, for
trading me the Ampliphone in the first place to restore my Major Havoc, and
to Mike Kelly for writing the FAQ without which this probably wouldn't have
happened.

There was one small error in FAQ I wanted to point out. (This is v1.1 from
gamearchive).

It lists the BU406D as Q2 and the MPS U07 as Q3. I think this is backwards.
Both my board (blue from a Star Wars, no serial number unfortunately) and
the schematic on gamearchive list:
Q2 - MPS-U07
Q3 - BU406D

(The board had been badly fried. It had diodes on the bottom, though
scorched to bad it's hard to tell if they were original. Also, though it had
no resistors, it had the holes for them exactly where the Mike suggests
putting them.)

I also wanted to suggest a few additions. For the secion on the Wintron:

 - The wire positions mentioned didn't exacly match my board. The spot for
the green wire, mentioned to be at 9:00 , was more like 11:00 . Slightly
confusing, but the order was still correct.

 - The big black wire isn't mentioned. While this looks obvious, if your
HV board didn't have a transformer in the first place, it might not be. On
that note . . .

 - A brief mention of the screen/focus assembly might be helpfull, should
someone else acquire a board with all the wires disconnected from it. The
schematic lists it's connections as 1 through 4, but without a way to orient
wich pin is which.

 - Perhaps someone could provide an explination of what the 5w/50ohm
resistors do. I know I'm interested in what these big things I added to the
board actually do. The diodes are someone obvious, but maybe just
mentioning them as clamping diodes for novices would be appropriate.

 - Are the 'brown jumpers' actually just jumpers ? I've never seen one quite
like that. Might they be a fusable link of some kind ?

 - Finally, while Computer Component Source has the BU406D, their e-mail
server looks to be dead. It hasn't responded in weeks. They shiped promptly
when I called the order in. Richardson Electronics does NOT appear to carry
this any longer.

-Chris

==========================================================
Chris Candreva -- chris@westnet.com -- (914) 967-7816
WestNet Internet Services of Westchester
http://www.westnet.com/

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Received on Wed Jul 12 11:00:35 2000