Atari CX 5200 Field Service Manual page 60

Black Screen Troubleshooting (Cont.)
BX
Are the fo llowing
voltages on the pins
of the transistor:
Ql
3.5 V
Base
Emitter 4 . 3 V
Collector 1 .2 V
Rep lace
Does unit
function?
If you are servicing a unit containing
PCB CA020 1 0 8 , chip designators have
been changed fro m U to A.
5 200 Field Servic e Manual
CX
Q£
3.5V
No
Rep lace
4.3V
transistor(s).
I V
Yes
Yl.
No
Yes
***N OTE***
4-3
Are voltages
correct?
No
Check for open,
shorted or wrong'
value component in
ciock circuit.
Repair or Replace
Yes