Atari CX - Controller Failures

2-PORT MODEL 5200 SYMPTOM CHECKLIST (Cant.)
CONTROLLER FAILURES
SYMPTOM
Joystick does not work
Keypad does not
work
Bottom Fire Button does not
fire
Top (Softfire) Fire
Button does not fire
CX5200 Field Service Manual
POSSIBLE CAUSES
PORT A7,A9-All
PORT, A7,AX,A2
multiplexer.
FLOWCHART
ENTRY
POINT
Pg. 6-3
Pg. 6-4
Pg. 4A-18
Pg. 4A-19