Atari CX 5200 Field Service Manual page 104

POTENTIOMETER CONTROL LINE TROUBLESHOOTING
POT Line
Cod e
Err or
2 2
23
24
2 5
CX5200 F ield Service Manual
Manually set the 5200
to the Pokey (Port)
T est, page 3A-8.
Can CAY on pin 9 of
+
defective port ad­
be
justed between 4-6.4V
by turning R l 32?
Yes
Swapou t
A7
Do pot lines pass?
No
From chart below
determine which line
is defective lie check
the components for
correct value.
Do POT Lines pass?
No
Port
Pokey Adjust
and
Pin #
Position
1 - 1 0
HOR 1
1 - 1 1
VERT 1
2- 1 0
HOR 4
2-1 1
VERT 4
Note: Some .5200 2-port boards have pins 1 ,8,9,10 and 1 1
o f A7
PCB. Future PCB's
Do
4 A-20
Yes
Open or shorted
trace.
Pokey (A7)
CAP
Pin
CAP ll
I
C 1 0 6
C98
1 4
C97 C 1 0 5
1 5
C 1 0 0
1 2 cn
C9 l C99
1 3
jumpered together on the solder side of the
will
incorporate this jumper.
not add these jumpers to the 5200 2-port board.
12 Resistor
R I 0 6
R l l O
R I 09
R 1 l 3