Editing Maintenance Guides (section)

=== Machines documented here but not yet written up ===

Some manufacturer documentation on this wiki covers machines that have no maintenance, troubleshooting or capacitor guide yet. The documents are the starting point if you want to write one.

* '''Sega Game Gear''' — [[Sega Game Gear Maintenance Manual (1992)]] (Sega's own, 82 pp: assemblies, disassembly, spare parts, PCB repair procedure and IC data for all four boards, but '''no schematic'''), [[Sega Game Gear VA1 Service Manual]] (Sega's own, 24 pp, the one-chip machine, '''with''' schematics, circuit board diagrams and a full electrical parts list) and [[Sega Game Gear TV Tuner PAL Service Manual]] (the MK-2101 tuner pack, with seven alignment procedures)
* '''Commodore 1541''' — [[Commodore 1541 Troubleshooting & Repair Guide]] (Sams, 1986: theory of operation, schematics, parts layouts and parts lists, with the drive motor servo circuit documented separately for the 1540, 1541 and 1542)
* '''Apple ink-jet and dot-matrix printers''' &mdash; ten ''Service Source'' volumes with no article behind them: [[StyleWriter Service Source]] (the only one with a '''revision-identification procedure''': Rev A logic board silkscreened QG2-5053, Rev B QG2-2403, and the two are '''not''' interchangeable), [[StyleWriter II Service Source]], [[StyleWriter 1500 Service Source]] ('''no internal supply and no fuse'''), [[Portable StyleWriter Service Source]] (optional NiCd pack; four of its ten error-LED states are battery states), [[Color StyleWriter Pro Service Source]], [[Color StyleWriter 2200 Service Source]], [[Color StyleWriter 2400 Service Source]] ('''internal supply and fuse'''), [[Color StyleWriter 2500 Service Source]] ('''same chassis, external adapter, neither'''), [[Color StyleWriter Service Source]] (actually the '''4100 and 4500''' manual) and [[Color StyleWriter 6500 Service Source]] (with an '''NVM hex decoder''' that makes the printer's stored state readable without the driver software). Also [[ImageWriter II Service Source]] and [[ImageWriter LQ Service Source]], both '''partial by Apple's design''' &mdash; the Take Apart and Adjustments chapters were shipped as a separate Paperless Printer file that is not here &mdash; and [[Envelope Feeder Service Source]] for the LaserWriter envelope feeder.
* '''Apple displays''' &mdash; [[Studio Display (17" CRT, 16" viewable image size) Service Source]] is the one Apple display manual here that publishes '''measured internal voltages with tolerances''': anode '''27 V DC ±0.2 V''' on Apple high-voltage probe '''076-0392''', B+ '''180 V ±2.0 V''' at pin 180V on P305, heater '''6.3 V ±0.63 V''' at pin H, and RGB cathodes '''65&ndash;85 V''' at pins RD/GN/BL and near-equal to one another. [[Studio Display (21" CRT, 19.8" viewable image size) Service Source]] adds a power-board check &mdash; '''6.7 V ±0.05 V''' at the cathode of diode '''DP9''', adjusted on '''PP1''' &mdash; and its own CRT discharge procedure. [[17" ColorSync Displays Service Source]] and [[20" ColorSync Displays Service Source]] are the '''AppleVision 750/750AV and 850/850AV''' manuals under the November 1997 names. [[Macintosh Portrait Display Service Source]] is the odd one out: Apple built '''domestic and international (“Series&nbsp;B”) versions whose troubleshooting and repair procedures differ''', and its Adjustments chapter carries '''two different video procedures''' — “Video With Screen Control” and “Video Without Screen Control” — so identifying the set in front of you comes first. [[Studio Display (15" ﬂat panel) Service Source]] and [[Studio Display DVI Service Source]] cover the flat panels, and between them carry Apple's three-way version-identification table. '''Read [[CRT Discharge Procedure]] before opening any of the CRT models.'''
* '''Apple Macintosh and Power Macintosh models with a manual here but no article yet''' &mdash; fourteen ''Service Source'' volumes. Compact and portable: [[Macintosh Portable Service Source]] (the one Macintosh whose main cell is a '''sealed lead-acid pack''' &mdash; it sulphates rather than leaking alkali, and a pack that has fallen below 5.4&nbsp;V can no longer be recharged by the machine) and [[Twentieth Anniversary Macintosh Service Source]] ('''377 pages with no Take Apart chapter at all''' &mdash; there is no Apple-published disassembly sequence for that machine anywhere). NuBus Power Macs: [[Power Macintosh 7100 Series Service Source]] and [[Power Macintosh 8100/ WS 8150 Service Source]], both of which carry the '''HDI-45 pinout''' and the logic-board connector map. PCI Power Macs: [[Power Macintosh 7200 Series/WS 7250 Service Source]] and [[Power Macintosh 4400 Service Source]] &mdash; '''both of those supplies are manually switched between 115&nbsp;V and 230&nbsp;V, not auto-ranging''', so an imported machine can arrive set for the wrong mains &mdash; plus [[Power Macintosh 7300/ 7500/7600 & WS 7350 Service Source]] (whose Troubleshooting chapter carries Apple's '''2/3/4/6&nbsp;GB Firmware Utility''', a software fix for a drive that mis-reports its capacity and looks dead), [[Power Macintosh 8200 and 8500 Series/WS 8550 Service Source]] (the '''only''' coverage anywhere of the Europe-only 8200), [[Power Macintosh 9500 Series Service Source]] (processor card treated as a separate module &mdash; a 9500 that will not chime is often a card that has worked loose) and [[Power Macintosh 8600/ 9600 & WS 9650 Service Source]] ('''700&nbsp;W peak inrush''', the figure to size a bench supply or UPS against). Also [[Macintosh Processor Upgrade Service Source]] for the PowerPC 601 upgrade card fitted to 68LC040 machines, and [[Power Macintosh/Performa 5200 and 5300 Service Source]], which carries Apple's '''REA Procedures''' for the freezing and video colour-hue faults and prints separate power-supply and analogue-board take-apart procedures for Rev.&nbsp;A and Rev.&nbsp;B boards. '''Read [[CRT Discharge Procedure]] before opening the all-in-one models.'''
* '''Schneider-badged printers''' &mdash; [[Schneider DMP3000 Service Manual]], [[Schneider DMP4000 Service Manual]] and [[Schneider NLQ-401 Service Manual]], the DACH-region manuals for the Amstrad DMP3000, DMP4000 and NLQ 401. The DMP3000 manual carries a '''full electrical parts list'''; the DMP4000 manual gives the '''three fuse ratings''' (T5A, T3.15A, T1A); the NLQ-401 manual gives the carriage '''T-belt MM310-3.2''', which also drives the ribbon feed.