Atari CX - Page 136

KEYBOARD TROUBLESHOOTING (KEYPADS)
Clean the upper PC
Did just
1 keypad fail?
Board
and the failed
keypad
.
I
Perform game cable
continuity check. Procedures, Trakball
and
(See chart)
Firebutton Test,
Page 7-8.
I I
Replace the game
Is the cable OK?
cable. 1) Keypad
I
b
1 yes 2) PC Board
I
Clean the upper PC
Go to Step 4 of
Board and both keypads.
Test Procedures,
I
Go to Step 4 of
Test Procedures,
Yes Do both keypads
I
now work properly?
Swapout:
1) Keypads
2) PC Board
t =Yes+, work properly?
Game Cable Continuity Check
Procedures, Trakball
&
Using a Digital Voltmeter, check the continuity from 11 (column 1) on the upper PC Board to the
game cable port connector (column
2).
Co to Step 4 of
Test Procedures,
Page 7-7.
Key
START, PAUSE,
START, 1,2,3
PAUSE,
4,5,6
RESET, 7,8,9
1 :9,7,*
2,5,8,0
3,6,9,1/
11 Pin /#
RESET 11
4
2
I
5
7
3
Game Cable Port
Connector Pin
/#
CX5200 Field Service Manual