Atari CX - Page 100

POTENTIOMETER CONTROL LINE TROUBLESHOOTING
to the Pokey (Port)
Can + CAV on pin 9 of
defective port
be ad-
justed between 4-6.4V
by turning R1 32?
1 Yes
From chart below
determine which line
is defective & check
the components for
correct value.
Do pot lines pass?
Yes
POT Line
Pokey Adjust
Port and Pokey (A71
Error Code
Position
Pin # Pin # CAP #I CAP #2 Resistor
J A
Do POT Lines pass?
No
22 HOR 1 1-10 14 C98
C106 R106
23 VERT 1 1-1 1 15
C97 C105 RllO
24 HOR 4 2-10 12 C92
C 100 R109
2 5 VERT 4 2-1 1 13 C9 1
C99 R113
Note: Some 5200 2-port boards
have pins 1,8,9,10 and 11
of A7 jumpered together on the solder side of the
PCB. Future PCB's will incorporate this jumper.
Do not add these jumpers to the 5200 2-port board.
4
I
P
Open or shorted
trace.
CX5200 Field Service Manual
- Repair