Atari CX - Page 101

POTENnOMETER CONTROL LINE TROUBLESHOOnNG (continued)
"Refer to the chart at the bottom of the page
for
+CAV transistor state levels.
L
Is the collector
Defective 413
of 413
High?
or discrete com-
! I L ponent.
I
I Yes
I I
Is pin 14 of A5
at Ov?
_I
I
Defective
1) Qll
2) R132
3) Discrete Component
I
I
i L
No
h d
Is the emitter of
Q14 High?
3) discrete component
J
Swapout A5
Repair or Replace.
r-l
No
. I
Condition/ Qll
B A B A
Q12
413
Transistor A B A
Ql4
B
Defective
1) Ql4
1
Emitter 13V
13V
3.2V
OV 0
0 3.2V OV
Base
12V
13V
4V OV
0 .7V
3.8V
OV
Collector 4-6.4V
OV 13V 13V 3.8V
OV 12V
13V
2) Q12
A: Pokey Adjust Selected
B: Other 1.1 tests (excluding Port Test)
CX5200 Field Service Manual
Changed by
ECN !I0036
6/21 /83