Star Tech Journal

STAR*IECH JOURNl'"4.,, _______________________ M_A_v_1_9_s4_
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24 _ _ _ _
ATARI
FIREFOX AMPLIFONE RASTER MODIFICATION
Step 1
I ■ m ■ nd ■ t:ory ■ nd
nearest pad. Install an insulated
jumper (1000 volts or better
insulation) between pad at CRT
socket pin 5 and either of the
pads at spade lug J9. Use a
number 20 wire.
mu ■ t: b ■ don ■
lmm ■ dl ■ t ■ ly.
Steps 2 through 6 provide increased
protection to the deflection board
and should be installed by a quali-
fied technician as soon as possible,
but especially if the game fails.
e. Cut the trace between connec-
tor JS pin 9 pad and the base
pad of 010. Install a 330 ohm,
±5%, ¼ watt, resistor between
1. Nack Board
Cut the trace between the pad
at CRT socket pin 5 and the
the base of 01 O and the con-
nector JS pin 9 pad.
CAUTION
To prevent arcing, it is absolutely
necessary to use a carbon-
composition resistor in the
following step.
3. Remove the
focus terminal
cover from the CRT socket and
unsolder the focus lead from
the terminal. Solder a 22 meg-
ohm, ±5%, ½ watt carbon-
composition resistor to the
terminal with the end flush with
the terminal and resistor paral-
lel to the board. Solder the focus
lead flush with the other end of
the resistor, and trim the resistor
lead. Route the focus lead back
to the exit groove and replace
the cover.
::,
•
...
CUT TRACE
•
-
l.:..
a
m
•
CUTTRACE
ADD RESISTOR, 330..0..
ADD JUMPER