Atari CX - Page 68

Color Troubleshooting (cont.)
I
Is there a .4v p-p
No
signal on the base
of Q3?
1 b
Defective R28 or open
Trace R28
to 43..
1 Yes
I
I
Is there a 4v p-p
No IS the signal present No
signal on the collector ' at approximately OV? Defective R29. I
of Q3?
I I
b
I yes I Yes
Is there a
3 volt p-p
signal between
C9
Defective R30
,- and R31?
1 Yes
1
J
Mistuned R.F. Module
or defective:
1) R31
2) RF Module or open
R31 to R.F. Module
Pin
4.
Defective C9 or open
I C9 to the collector
CX 5200 Field Service Manual
If you are servicing a unit containing
PCB CA020 108, chip designators have
been changed from U to A.