Atari 400

KEYBOARD
(contl
Troubleshoot
. using
foilowing
information
and
Keyboard
achematic.
Page 5-3$
TYPICAL
KEYBOARD
OUTPUT
Sample
oaade from
Z104,
Pin
U '^th
W
key depressed.
SCOPE:
rTT/DIV,.5oiS/DIV
SYNC ;
CHI,
Trigger
ltJ
TYPICAL
DECODER
OUTPUT
Sampie
made
from
Z104.
Pin 3
with
W
key
depressed
SCOPE
;
TTV/DIV,
.2mS/DIV
SYNC
;
CHI,
*
Trigger
nn
Pass
JCSS.
Go to
TONE
TEST,
Page
5-24
MO
CaU
ATARI
Tech
Une
Specialist
Inside
California
(800) 672-1466
Outside
California
(800) 538-1535
(800) 538-1536
ATARI
Home
Computer
5-23