Atari CX 5200 Field Service Manual page 141

CURSOR LEFT fRIGHT TROUBLESHOOTING (Cont.)
C I
Is the slightly
r o unded square wave
at pin 5 and pin 7 of
Al a minimum of
4 5 0 M V ? ( Maximum
)
2 . 5 V
Yes
Is there approx.
4 0 0 M V at pins 4
6 of AI ?
Yes
Replace AI .
X
Return to beginning of Test Sequence
C X5200 Field Service Manual
No
Replace U l .
No
Is C I 0 shorted or
&.
are R 3 0 , R3 1 open?
Replace defective
component.
7 - 1 6
No
Replace A I .
Yes