SYMPTOM
CHECKLIST
SYMPTOM
POSSIBLE
CAUSES
Noisy operation or
ball
Dirty roller and idler
won't spin freely
shafts and ball, worn
bearings, warped encoding
wheels
Keyboard failure
Fire button failure
Dirty keyboard PC board,
dirty 12-key switch
set,
or defective game cable
-
-
Damaged dome switches on
keyboard PC Board, defective
game cable
Cursor won't move at
all
Ql, A3, defective game
cable
Cursor moves erratically left A3
and right or
up
and down
Cursor won't move left
Ul, Al-A5,
C7
or right
Cursor won't move up
U2, A1-A5,
C8
or down
Directional dropouts U 1,
PC
board not seated
(left or right) properly
Directional dropouts
(up or down)
U2, PC board not seated
properly
Blank screen when
C1
,C2
or any of the
trakball is plugged in
IC's ALA5 shorted to ground
CX5200 Field Service Manual
FLOWCHART
ENTRY
POINT
A,
Page 7-11
8,
Page
7-12
See Chart,
Flowchart
B,
Page
7-12
No Flowchart
Entry Point
No Flowchart
Entry Point
C,
Page 7-14
D, Page 7-19
E,
Page
7-23
E,
Page 7-23
No Flowchart
Entry Point
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