Atari 2600 Field Service Manual page 51

Defective S w i t c h Troubleshooting Procedure (continued)
Check RAM
(A2021 pin for
the switch for
+5v. I s
it
present?
Pg..
4-9
Check for shorted
trace
L i n e . Repair
as necessary.
Does switch
now
work?
Swapout A 2 0 2
2
Does switch
now
work?
C h d whether capa-
citor on that RAM
line b shorted
to
ground
Replace as
necessary. Does switch
now work?
Pg. 4-2
2500/2600A
Domestic VCS