Atari CX 5200 Field Service Manual page 86

BLACK SCREEN TROUBLESHOOTING
+ 5 Gnd
1
A l
8 1 , 2 1
A2
1
2 1
A 3
3
A 5 2 7
8
1 6
A6
1
1 7
A7
1 2
24
A8
8
A9 1 6
8
A I O 1 6
8
1 6
A l l
1 4 7
A l 4
7
A 1 5 1 4
8
A 1 6 1 6
8
1 6
A l 7
8 1 6
A l 8
8 1 6
A 1 9
1 6
A20 8
8 1 6
A 2 1
1 6
8
A22
8 16
A 2 3
1 6
A24 8
1 6
8
A 25
7
A 2 7 1 4
CX5200 F ield Service Manual
Is there + 5V to all
( )
chips? See chart
Yes
Is Pin 40 of A2 at 5V?
Yes
Is Pin 36 of A3 at 5V?
Yes
Swapout
1 ) A 2
2 ) A3
3) A5
4) A8
5 ) A 7
Is problem repaired?
� A-2
Repair open between
No
chip +5 or ground.
&:
(
Check for bad socket)
Defective A l or other
No
reset circuitry connect-
ed to A2 pin 40.
No
Open P in 36 of A3 to
Pin 4 0 of A2.
Yes
Repair
or
Rep lace