Atari 2600 Field Service Manual page 75

Defective Switch Troubleshooting Procedure
Put inoper-
ative switch in
up
(open)
position.
I
I s trace
3201 pin for that switch line
shorted
(see
connection chart)?
to
groud?
Yes
Repair
P
b dv now
present on
J2Ol pin for
that switch
(see chart)?
Does panun
on Screen
change when
switch b
flipped?
I
I s
o n side
of
switch tied ,to
ground as
Shown
in schematic?
CONNECTION CHART
Switch
11
0 1
Pin No.
lad<
h
White
4
Left Difficulty S
Right Difficulty 7
select 9
Reset 8
2600/2600A Domestic VCS
2 '
Replace switch
i