Atari 800 Service Manual

Proceed with the following steps to troubleshoot the system:
1. Disassemble the Console using the instructions outlined in para-
graph 5.5 for the 400 Console, and paragraph 5.6 for the 800 Con-
sole.
2. Clean the RAM Memory PCB and CPU PCB contact fingers per the
instructions outlined in paragraph 5.2.1, PCB Contact Cleaning and
Lubrication.
3. Assemble the individual boards to operate the system out of the
casting, see Figures 5-10 and 5-11. Refer to paragraphs 5.7 and 5.8
for assembly instructions. Plug low voltage power adapter into the
System Power jack.
4. Perform System Check-Out, refer to paragraph 5.3.
NOTE
Television screen interference is normal when the system is
operated without the aluminum casting.
4. If the system will not power-up properly, proceed to Troubleshoot-
ing Procedure Number Two.
Figure 5-10. 400 Console, Assembled Without Casting
5-20 System Service Manual

Atari 800 Specifications

General

Processor	MOS Technology 6502
Processor Speed	1.79 MHz
ROM	10 KB
Graphics	ANTIC and GTIA chips
Release Year	1979
Display Resolution	up to 320 x 192
Colors	128 colors
Sound	4 channels
Storage	Cartridge, cassette, floppy disk
Ports	Cartridge, serial, monitor
Operating System	Atari OS