Atari CX - Page 98

TRIGGER LINE (BOTTOM FIRE BUTTON) TROUBLESHOOTlNG
(See Chart Below)
Plug
in controller.
P
I
Is pin still at &5V?
Defective controller.
t
Is the A5 pin for the
defective port at
+5
volts with everything
unplugged from the port?
(see chart below)
J
Push and hold
bottom fire button.
Defective:
1) A5
2) Socket of A5
3) Cap on that line
Does signal drop to
Is trig er line
approximately shorte%to+ZV? CheckRlllorR117
I
'No
0-1 volt? for open.
4
I I
NO
-
I Yes
h
Defective A5.
0
CX5200 Field Service Manual
Yes
Pwt A5Pin# Cap# Res #
Note: Some 5200 2-port boards have pins 1,8,9,lO and 11
of A7 jumpered together on the solder side of the
PCB. Future PCB's will incorporate this jumper.
4A-18
Do not add these jumpers to the 5200 2-port board.