Atari 2600 Field Service Manual

PADDLE CONTROL LINES TEST
- -
a
Purpose: To test the proper operation of the Paddle Control Lines by viewing
the analog waveforms at the analog-to-digital conversion inputs of the TIA
chip.
Format:
Pins
37, 38, 39, and 40 of the TIA chip are checked with the
oscilloscope with the
VCS unit in Diagnostic Matrix mode and with the
shorting plugs
in place. This test is required only if there is a problem with
the
hand controller lines. The procedure for this test is detailed in Section 4.
2600/2600A Domestic VCS

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