Atari SM125 Documentation
Atari documentation for the Atari SM125 monochrome monitor.
SM125 service manual
[edit | edit source]The cover reads "Atari SM125 High-Resolution Monochrome Monitor, For Use with All Atari ST Personal Computers, Service's Manual", part number C026408, printed in Taiwan. It is undated and has 20 pages, with printed page numbers matching the PDF.[1]
Contents
[edit | edit source]| Page | Contents |
|---|---|
| 1 | Cover |
| 2 | Introduction: display characteristics, controls, dimensions |
| 3 | Weight; adjustments (brightness, vertical size and linearity, focus, raster centring); safety precautions |
| 4 to 7 | Operation theory: switch-mode power supply, video, CRT, vertical, horizontal, high-voltage and audio circuits |
| 7 and 8 | Service notes: circuit tracing, component removal, troubleshooting by section, CRT replacement, raster centring, deflection yoke |
| 9 | Board layout |
| 10 | Figure 1, power supply block diagram |
| 11 to 13 | Troubleshooting flowcharts: regular, video and horizontal diagnostics (Figs. 2 to 4) |
| 14 to 20 | Waveforms and DC voltages for Q401, IC401, Q402, IC201, IC301, Q300 and Q302, and the yoke currents |
What this manual does not contain
[edit | edit source]- A parts list, a schematic or any capacitor values. The Atari Document Archive catalogues versions of this manual with a parts list and with a schematic added.[2]
- A procedure for opening the cabinet.
- The rating of the second fuse mentioned in the service notes.[1]
Pages that cite this document
[edit | edit source]- Atari SM125: specifications and hardware
- Atari SM125 General Maintenance: mains setting, adjustments, tube removal
- Atari SM125 Troubleshooting Guide: flowcharts and voltages
Download: Atari SM125 Service Manual (C026408).pdf
References
[edit | edit source]- ↑ 1.0 1.1 Atari, SM125 High-Resolution Monochrome Monitor Service's Manual, P/N C026408. File:Atari SM125 Service Manual (C026408).pdf; source Internet Archive item SM125_Service_Manual.
- ↑ Atari Document Archive (docs.dev-docs.org), search results for "sm125". https://docs.dev-docs.org/htm/search.php?find=sm125