Atari CX - Page 147

UP/DOWN DIRECTIONAL DROPOUTS TROUBLESHOOTING
I
Set oscilloscope
sweep time to
.2
msec/div.
1 Is the rounded square I
wave at pin 9 and
pin 11 of A1 a mini-
(Maximum 2.5V)
Ball must be spun
I
at a fast rate.
1
Does the waveform
have
a 50150 duty
cycle?
(Minimum Replace U2.
acceptable duty
cycle: 60 /4O)
I
Swapout:
I) A1
2) A2 I
Return to beginning of Test Sequence
CX5200 Field Service Manual