Atari CX - Page 67

Color Troubleshooting
*
Manually set unit onto
color bars pattern.
4
I
h
I
Is frequency of Y1
No
Replace
Y 1
3.5795.
I
L v
L
I
1
Does Pin 17 of U5
Defective
adjust between
0 and
6 volts when R8 is
1) R8
adjusted.
2) CR2
I
justed to 6V is there a
4 volt p-p signal on pin
21 of U5?
( Yes
-
b
I
I
Repair
Is there a 2 volt p-p
No Defective C11 or
b
open Cll to U5 Pin 21. ' or
signal between C11
& R28? d Replace
r
( Yes
If you are servicing a unit containing
Page 4-I
PCB CA020108, chip designators have
been changed from u to A.
CX 5200 Field Service Manual
4-14