Atari 520ST and 1040ST Computer Field Service Manual
The 520ST/1040ST Computer Field Service Manual is Atari Corporation's service manual for the Atari 520ST, Atari 520STM, Atari 1040STF and Atari 1040STFM, part number C026118-002, Revision B (3.6), dated January 1987. The hosted file is a 69-page scan of a copy supplied by Mauritron Technical Services of Chinnor, Oxfordshire, whose cover sheet and notice occupy the first two PDF pages. It has no text layer.
Contents
[edit | edit source]The manual's own contents page (PDF page 4) lists nine sections. PDF page numbers are given so that citations can point at the scan.
| Section | Printed pages | PDF pages | What it covers |
|---|---|---|---|
| Title and contents | – | 3–4 | Part number, revision and date |
| 1 Introduction | 1.1–1.6 | 5–10 | Models and options (STM and STFM have the modulator; the phase-locked loop added in April 1986), case and panel layouts, both power supplies with ratings and typical current draw |
| 2 Theory of operation | 2.1–2.16 | 11–26 | Glue, main memory and ROM map, memory controller, DMA, MFP interrupts, Video Shifter, display memory, sound, video interface and monitor levels; pin assignments for the monitor (figure 1.4), MIDI (1.5), mouse and joystick (1.6), printer (1.7), RS-232 (1.8), floppy (1.9) and hard disk (1.10) ports; power-up sequence; system errors |
| 3 Testing | 3.1–3.19 | 27–45 | Test equipment, test configuration, "Troubleshooting a dead unit" (clock, HALT and BERR checks at the 68000), the ST Diagnostic Cartridge revision 3.6 test by test, and the error-code tables |
| 4 Disassembly/assembly | 4.1–4.5 | 46–50 | 1040ST and 520ST, both ways |
| 5 Symptom checklist | 5.1–5.2 | 51–52 | Display, disk drive, keyboard, MIDI, RS-232, printer and hard disk port faults with probable causes |
| 6 Diagnostic flowcharts | 6.1–6.5 | 53–57 | Replacement and IC handling notes, then four flowchart pages including "No display on monitor or terminal" |
| 7 Parts lists | – | 58–60 | 1040STFM parts list dated 1 May 1986, pages 1 and 2 of 3: capacitors, resistors, networks, inductors and noise filters, transistors, diodes, crystals (Y1 2.4576 MHz, Y2 32.0424 MHz, Y3 3.579545 MHz), the NTSC RGB encoder/modulator C070517 at MOD1, connectors J1–J12 and sockets |
| 8 Schematics and silkscreen | – | 61–66 | Atari (Japan) drawing "Typical 1040STF(M) Power Supply" (30 September 1986, 117 V input), with RV301, PC1 and the output filter capacitors; keyboard schematic C070075 sheet 5 of 5, and a second clipped image of it; ST functional block diagram; ST system clock diagram |
| 9 Glossary | 9.1–9.3 | 67–69 | Signal and part names |
What this manual does not contain
[edit | edit source]- There is no main board schematic. Section 8 of the scan holds only the power supply drawing, the keyboard sheet, the block diagram and the clock diagram. Atari's 520ST/260ST board schematic, drawing C070231, is hosted separately as File:Atari 520ST Schematic C070231.pdf.
- Page 3 of the parts list is missing. Only a clipped fragment of it shows at the edge of PDF page 64, so the integrated circuits and their part numbers are not listed. The list that is present is for the NTSC 1040STFM board.
- There are no assembly drawings or silkscreens, although the section headings name them.
- Sections 5 and 6 refer readers to a separate Diagnostic Cartridge Troubleshooting Guide for detail; that guide is not included.
- No coverage of the 520STFM (released December 1986), the Mega ST or the STE range. For the STE see Atari 520STE/1040STE Field Service Manual.
Pages that cite this document
[edit | edit source]- Atari 520ST: power supply ratings, ROM map, clocks, port pinouts, disassembly and dead-unit checks
- Atari 520ST+: RAM organisation and external supply ratings
- Atari 520STM: modulator and phase-locked loop, MOD1 and its crystal
- Atari 520STFM: internal supply drawing, rating and adjustment
- Atari 260ST, Atari 1040ST, Atari 1040STF, Atari 1040STFM
- Atari ST General Maintenance
Download: Atari 520ST and 1040ST Computer Field Service Manual.pdf (67 MB)