Atari 400 Service Manual

Figure 5-24. 800 Console, Keyboard Removal
5. Access to CPU Printed Circuit Board, refer to Figure 5-27
• Set Module Assembly on its back
• Remove nine screws (no. 6 32x5/8) from Lower Shield
• Lift Motherboard and Lower Shield out of aluminum
casting
• Remove CPU printed circuit board
6. Access to Motherboard, refer to Figure 5-28
• Carefully slide screwdriver underneatn Motherboard next
to nylon clip. Gently raise handle of screwdriver,
prying off. Repeat operation for other three nylon
clips.
• Lift Motherboard off Lower Shield
CAUTION
Be careful not to bend any of the pins on the
Motherboard Connector
5-39 System Service Manual

Atari 400 Specifications

General

Manufacturer	Atari
Model	400
Type	Home Computer
Release Year	1979
CPU	MOS Technology 6502
CPU Speed	1.79 MHz
ROM	10 KB
Operating System	Atari OS
Keyboard	Membrane keyboard
RAM	8 KB (expandable to 48 KB)
Graphics	ANTIC and GTIA chips
Sound	4 channels
Display	RF output for connection to TV
Storage	Optional cassette tape drive or floppy disk drive
Ports	Cartridge
Display Resolution	320x192 (16 colors)