Atari 2600 Field Service Manual

2600A Paddle Lines Test
4
7
I
Put snorting
?lugs in. Put
VCS into
Diagnostic
Mauix mode.
I
A
-
No
I
& there con-
tinuity between
Check trace lines and
resistors for
opens
- Repair
the 3202 or 3203
m
P I
pin (see chart)
1 and the A20 l?
Check '2°2/3203 for RC
waveform (see Fig. 4-10).
k waveform present on
each of the pins shown
in chart?
on the failed line.
Dges RC waveform appear yes
on the appropriatt 3202
'
or 3203 Line? (See Chart)
4
Line now work?
.
I
Repair
A
-
Connection Chart
Repar open
trace between
Do paddle lines now Yes
I
A20 1 and 12021
work
OK?
1203.
Pin Pin Pin Cap
Player A201 3202 203 No.
1 40 5 - C215
2399- C216
3 38 - 5 CZ17
u 37 - 9 C218
1
No
I
Yes
-
~oes waveform appear at
each of the ~201 pi,,s
shown in the chart?
b

Atari 2600 Specifications

General

Manufacturer	Atari, Inc.
Release Date	September 11, 1977
CPU	MOS Technology 6507
CPU Speed	1.19 MHz
RAM	128 bytes
Graphics	Television Interface Adaptor (TIA)
Media	ROM cartridge
Successor	Atari 5200
Colors	128
Sound	2 channels
ROM	4 KB
Controller Input	Joystick