Atari 1025
| Atari 1025 Printer | |
|---|---|
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|
| Atari 1025 80-column printer, from Atari's 1983 flyer | |
| Manufacturer | Atari, Inc. |
| Type | 80-column dot matrix printer |
| Release date | Introduced December 1982; shipping from spring 1983[1] |
| Price | US$549 (1983)[1] |
| Interface | Atari SIO, two I/O connectors[2] |
| Compatible | Atari 8-bit computers[2] |
| Power | Internal transformer, 1.75 A fuse; European version uses an external adaptor[2][1] |
| Media | Roll, fanfold or single-sheet paper; typewriter-style ribbon spools[1][3] |
The Atari 1025 Printer is an 80-column, seven-wire dot matrix printer for the Atari 8-bit computers. Atari introduced it in December 1982 with the 1200XL, the 1010 program recorder and the 1020 plotter, and shipped it in spring 1983 at US$549.[1] It plugs directly into the SIO bus, so it needs no interface module.[2] The FAQ identifies it as a version of the Okidata Microline 80.[1]
Specifications
[edit | edit source]| Item | Value |
|---|---|
| Print method | Seven-wire impact dot matrix, 5 × 7 characters, unidirectional[2][1] |
| Speed | 40 characters per second at 10 cpi[1] |
| Pitch | 5, 10 and 16.7 characters per inch (16.5 in Atari's own self-test text)[1][2] |
| Line length | 80 or 64 characters per line[2] |
| Line spacing | 6 or 8 lines per inch[2] |
| Character sets | Standard and European[2] |
| Paper | Roll, fanfold and single sheets[1] |
The printer powers up at 10 characters per inch, 6 lines per inch and 80 columns, with the European characters off.[2] Its command set covers only character pitch, line spacing, line length and the European character set; it has no dot graphics mode.[2][3]
Hardware
[edit | edit source]Atari's 1025 Printer Field Service Manual (FD100290 Rev. 01, June 1983) covers the printer in detail.[2] All of the electronics are on one board. An 8051 microcontroller (Q8), clocked at 7.37 MHz, reads the data from the computer, looks up each character's dot pattern in a 2732 EPROM (Q7), and drives the print head and both motors; an 8155 RAM and I/O chip (Q5) holds the current settings and drives the motor lines.[2]
| Location | Part | Atari part number |
|---|---|---|
| Q8 | 8051 CPU-001 (Rev. 2) | FC100387 |
| Q7 | 2732 EPROM | FC100448 |
| Q5 | 8155 RAM and I/O | FC100389 |
| Q6 | 74LS373 | FC100390 |
| Q2-Q4 | 74LS05 | FC100391 |
| Q1 | FS7805 voltage regulator | FC100392 |
| TRA3 | STA303 transistor array | FC100393 |
| TRA1, 2, 4 | STA403 transistor array | FC100394 |
| D1-D6 | GP15B diodes | FC100404 |
The Sams Computerfacts for the printer lists the regulator as an HA17805P and the CPU as an iP8051.[4]
Power supply
[edit | edit source]The North American 1025 takes mains through its own cord. A transformer gives 26 V AC and 10 V AC. The 26 V winding feeds a bridge rectifier for the motors and print head; the 10 V winding is rectified to about 10 V DC and regulated to +5 V for the logic.[2] Two 1.75 A fuses protect it, one in the mains input (F2 in Sams' numbering) and one on the low-voltage winding (F1).[4] The owner's guide gives the fuse as 250 V, 1.75 A, and a spare came with each printer.[3] The European 1025 instead used an external adaptor with two DC outputs, 29 V at 600 mA and 8.6 V at 1 A.[1]
Mechanism
[edit | edit source]The print head holds its seven wires back with a permanent magnet; energising a coil cancels the magnet and a spring drives the wire against the ribbon. The carriage is driven by a pulse motor and toothed belt, four steps (30°) moving it 2.54 mm, and a photo-interrupter home sensor stops it on carriage return. The same motor drives the ribbon, which reverses when an eyelet trips the detector lever. A second pulse motor feeds the paper 4.23 mm (1/6 inch) every 24 steps. A microswitch under the paper detects the end of the paper.[2]
Known faults
[edit | edit source]- Faded print from a worn ribbon, and ribbons that do not feed because they are threaded wrongly.[3]
- A dead printer with a blown fuse.[3][4]
- Error 144 at the computer. Error 144 means the device answered with an error; one owner cleared it on a 1025 by reloading paper that had nearly run out.[5]
- Missing dots from a dirty print head face or a damaged flat cable.[4]
Diagnosis is on the Atari 1025 Troubleshooting page, care and adjustments on the Atari 1025 Maintenance Guide, and the electrolytic capacitors on the Atari 1025 Capacitor Replacement Guide.
Documentation
[edit | edit source]- Atari 1025 Documentation: the field service manual, the Sams Computerfacts and the owner's guide, with contents.
- 1025 Printer Field Service Manual, FD100290 Rev. 01 (June 1983).
- Sams Computerfacts CP21, Atari Model 1025 Printer (1986).
- The Atari 1025 Printer Owner's Guide.
Related pages
[edit | edit source]- Atari 1025 Maintenance Guide
- Atari 1025 Troubleshooting
- Atari 1025 Capacitor Replacement Guide
- Atari 1025 Documentation
- Atari 1020
- Atari 1027
References
[edit | edit source]- ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 Michael D. Current (ed.), Atari 8-Bit Computers: Frequently Asked Questions, comp.sys.atari.8bit FAQ, last modified 29 November 2009: section 4.2 (the 1020, 1025, 1027 and 1029 printers), section 6.7 (power requirements) and section 11.1 (history, December 1982 to spring 1983). faqs.org. Community reference.
- ↑ 2.00 2.01 2.02 2.03 2.04 2.05 2.06 2.07 2.08 2.09 2.10 2.11 2.12 2.13 2.14 Atari, Inc., 1025 Printer Field Service Manual, FD100290 Rev. 01, June 1983. Theory of operation (pp. 1-1 to 1-9); maintenance and testing (pp. 3-1 to 3-7); disassembly and adjustment (pp. 4-1 to 4-10); symptom checklist (p. 6-1); parts lists (pp. 7-1 to 7-3); silkscreen and schematic (oversize package). Hosted here as File:Atari 1025 Printer Field Service Manual FD100290 Rev 01.pdf.
- ↑ 3.0 3.1 3.2 3.3 3.4 Atari, Inc., The Atari 1025 Printer Owner's Guide: connection, ribbon and paper installation, troubleshooting questions and the control codes. Hosted here as File:Atari 1025 Printer Owner's Guide.pdf.
- ↑ 4.0 4.1 4.2 4.3 Howard W. Sams & Co., Computerfacts CP21, Atari Model 1025 Printer (1986): replacement parts list, preliminary service checks, interconnecting diagram and power supply schematic. Hosted here as File:Sams Computerfacts CP21 Atari 1025 Printer.pdf.
- ↑ "Atari 1025 printer question", AtariAge Forums, Atari 5200 / 8-bit Programming, February 2017 to May 2020, posts by phaeron (2 March 2017), leech and _The Doctor__ (28 May 2020). forums.atariage.com. Community discussion.