Atari 65XE General Maintenance
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General maintenance for the Atari 65XE. Cleaning, supply, connector, keyboard and colour-adjustment work is the same across the XE range, and the Atari 130XE General Maintenance page has the full procedures.
Which board is fitted
[edit | edit source]| Assembly | RAM | Figure | Notes |
|---|---|---|---|
| CO70025 | 8 × 4164 (64K × 1) at U9–U16 | 2-7 | No C22 |
| CA20097 | 8 × 4164 at U9–U16 | 2-9 | Drawn as "65XEN" |
| CA200519 (C103579-001) | 2 × 4464 (64K × 4) | 2-11 | Shared with the 800XE; the sheet is titled "65XE/800XE" |
The figures are from the 2016 reproduction of the 130XE service manual, whose schematics were redrawn in 2014 by "jer/eightbitter"; it is not an Atari document.[1] The FAQ lists late NTSC 65XEs on the NTSC 130XE board and the common later PAL 65XE, with the expansion (ECI) port, on the PAL 130XE board.[2] The board determines how many RAM chips there are to test and whether C22 is fitted.
Power supply
[edit | edit source]The 65XE takes +5 V DC from an external supply through a 7-pin DIN socket, J7 (Atari part C061838 on the 130XE): pins 1, 4 and 6 are +5 V, pins 3, 5 and 7 ground and pin 2 the shield.[3][2] It is not a barrel jack, and there is no rectifier or regulator on the board; after the power switch S1 the 5 V is filtered into separate rails through ferrite beads.[4]
The FAQ lists two Atari supplies for the 65XE: the 5 V DC 1 A unit C070042, whose "Logo" version shipped with most 65XEs, and the 5 V DC 1.5 A unit C061982/CA024814 shared with the 600XL, 800XL, 130XE and XE Game System. It warns that the sealed "Ingot" version of the 1.5 A unit, supplied with some 65XEs, can damage the computer if it fails and the machine is not switched off quickly, and advises disconnecting it if hum bars appear on the screen.[2]
Measure an unknown supply at its plug before connecting it. If a supply has failed, check the computer for a short between J7 pins 1 and 3 with the power switch on before fitting a replacement. The supply and its own capacitors are covered on Atari 130XE General Maintenance#Power supply.
Opening the machine
[edit | edit source]The reproduction gives the sequence as: four screws in the bottom cover; disconnect the keyboard cable and the LED connector; seven screws hold the shielded board; seven tabs hold the shields together.[1] The full sequence is on Atari 130XE General Maintenance#Opening the machine.
Capacitors
[edit | edit source]There are eleven electrolytics, or ten on a CO70025 board, which has no C22. The largest is C1, 470 µF, the input reservoir after the power switch; C2 and C3 sit beside it on the incoming supply.[4] The complete list with ratings and Atari part numbers is on the Atari 65XE Capacitor Replacement Guide.
Self test
[edit | edit source]Hold OPTION while switching on, with no cartridge and no powered disk drive, to disable the built-in BASIC and run the self test.[2] Atari's XE/XL production test cartridge (Rev 3.4) goes further; its tests and error codes are on the Atari 65XE Troubleshooting Guide.[5]
Colour adjustment
[edit | edit source]The colour control is R38, a 500 kΩ preset (Atari C023030-04 on the 130XE).[3][4] Atari's production test adjusts it with the video test's colour tuning bar: turn the pot until the smaller bar inside the tuning bar disappears. The pot is reached through a hole in the bottom of the housing.[5] Adjust it before suspecting GTIA for a colour fault.
Related pages
[edit | edit source]- Atari 65XE
- Atari 65XE Capacitor Replacement Guide
- Atari 65XE Troubleshooting Guide
- Atari 130XE General Maintenance
- Atari 800XE General Maintenance
- Recommended Tools
References
[edit | edit source]- ↑ 1.0 1.1 Atari 130XE Personal Computer Field Service Manual, 2016 reproduction (PDF author "Jurek"), schematics "Drawn by jer/eightbitter", 2014: section 2, figures 2-7, 2-9 and 2-11, and section 4, console disassembly. Not an Atari publication. Hosted on this wiki: Atari 130XE Field Service Manual (PDF).
- ↑ 2.0 2.1 2.2 2.3 Michael D. Current (ed.), comp.sys.atari.8bit Frequently Asked Questions, last modified 29 November 2009, sections 1.7 (versions and boot options), 1.16 (power socket pinout) and the power supply list, faqs.org.
- ↑ 3.0 3.1 Atari (U.S.) Corp., 130XE Parts List, 25 June 1985: J7 (C061838) and R38 (C023030-04). Hosted on this wiki: Atari 130XE Parts List and Production Test Instructions (PDF).
- ↑ 4.0 4.1 4.2 Jerzy Sobola, Atari 65XE schematic, nine sheets, 2003–2009: sheet 3 (R38) and sheet 8 (J7, S1, L1–L3, C1–C3). Community redrawing of the 8 × 4164 board. Hosted on this wiki: File:ATARI65XE-SCHEMATIC.pdf.
- ↑ 5.0 5.1 Atari Corp., XE/XL Production Test Operator's Instructions, Rev 3.4, 22 May 1986, pages 1 and 2 (the cartridge identifies a 65XE as "ATARI 65XE TESTS"; video test and colour tuning bar), in Atari 130XE Parts List and Production Test Instructions.