Atari 2600

Snowy Screen troubleshoot in^ Procedure,
Motherboard
I
Use swapout
Bad switchboard.
procedure to
. identify which
board is bad.
Pg. 4-18
Bad motherboard.
I
Yes
1s +5v present
at J2Ol Pin I?
i
Pg. 4-12
L
4 J
No
Is modulation Yes
Is there continuity
Replice 520
1.
across 5201 pin 2?
evident on
the TV screen?
i A
Yes No
Is +7.5-9.0~
present at 3204
(the power jack)?
Check at bottom
of board
*
Replace J204.
4
1
2600/2600A Domestic VCS
No
Yes
I
Is 3204 OK?
0 pg.4-ll 0 - Pg. 4-1 1
r)
I
4
I I
Check for open
trace line between
J204 and J201.
7
Repair
d
I M
t b
Yes
Voltage shorted
to ground.