File:Atari 800XL Computer Field Service Manual FD100740 Rev 01.pdf

Atari, Inc., 800XL Computer Field Service Manual, document FD100740 Rev. 01, February 1984. Copyright 1984 Atari, Inc., Sunnyvale, California. Scan of 47 PDF pages, including the covers and the fold-out schematic and silkscreen. Described on Atari 800XL Computer Field Service Manual.

Contents, with the manual's own page numbers:

• Introduction (p. v)
• Section 1, Theory of operation (pp. 1-1 to 1-15): user interface and function keys; mechanical theory; system and functional block diagrams; pin assignments for the 6502C (fig. 1-3), ANTIC, GTIA, POKEY and PIA; OS ROM, BASIC ROM, DRAMs and MMU; RF modulator output (p. 1-10); monitor output levels (p. 1-10); power supply, "+5 VDC output (+/- 2%)", 1.2 A maximum, 7-pin DIN (pp. 1-10, 1-11); SIO, controller jack, cartridge and parallel bus interface pinouts (pp. 1-11 to 1-15)
• Section 2, Testing (pp. 2-1 to 2-3): the built-in self test (memory, audio-visual, keyboard, all tests); the SuperSALT diagnostic cartridge FD100335, test assembly FA100332 and technical user's manual FD100770
• Section 3, Symptom checklist (pp. 3-1 to 3-3)
• Section 4, Assembly/disassembly (p. 4-1)
• Section 5, Schematics and silkscreens and parts list (pp. 5-1 to 5-6): silkscreen, the domestic/U.K. schematic on two scanned sheets (U.K. additions in dotted boxes, with notes for domestic units), and the parts list with Atari part numbers
• Section 6, Service bulletins (p. 6-1): the description of the bulletin types only; no bulletins are filed in this copy

What it does not contain: component values inside the external power supply (CA024814-001) or the RF modulator (UM1652, CA061619), which are listed as single parts; any service bulletins. The parts list prints U4 as the 16K × 8 OS ROM (C061598) and U5 as the 8K × 8 BASIC ROM Rev. B (C060302), while the schematic draws U4 as the 8K BASIC ROM and U5 as the 16K OS ROM (27128).

Used by Atari 800XL, Atari 800XL General Maintenance, Atari 800XL Troubleshooting Guide and Atari 800XL Capacitor Replacement Guide. A third-party manual derived from the same material is hosted as Atari 800XL Service Manual.

https://archive.org/details/atari-800-xl-computer-field-service-manual-rev-01-feb-1984 (file Atari_800XL_Computer_Field_Service_Manual_Rev_01_Feb_1984.pdf, retrieved 2026-10-01)

Atari, Inc., Consumer Product Service.

Copyright 1984 Atari, Inc. All rights reserved. Not freely licensed. Hosted for preservation and repair reference.