RetroTechCollection

Apple Two-Page Mono Service Source

The Apple Two-Page Monochrome Monitor volume of Apple's Service Source is a 98-page service manual for Apple's 21-inch two-page monochrome monitor. The PDF was distilled on 6 December 1995.[1]

Specifications as printed

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Apple Two-Page Monochrome Monitor specifications[2]
Item Value
Picture tube 21 in diagonal, 20 in viewable; P4 (white) phosphor; flat, square, antiglare
Screen resolution 1,152 × 870, 77 dpi; up to 16 greys with 512K of video RAM
Scan rates Vertical 75 Hz; horizontal 68.7 kHz; dot clock 100 MHz
Active display area 381 × 287 mm (15 × 11.3 in)
Input Analogue video, RS-343
Controls Power switch on the rear panel; brightness and contrast on the right side
Power supply Universal, 90-270 VAC self-configuring, 47-63 Hz, 95 W maximum
Size and weight 399 mm H (add 81 mm for the integrated stand) × 495 mm W × 442 mm D; 25 kg (55 lb)
Operating environment 10-35 °C; 90% humidity maximum, non-condensing; up to 3,048 m

Service notes from the manual

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  • Fuse: some units with serial numbers between 43661GXW and 44718HQX were fitted with a 1.6 A fuse on the power supply board. Apple says that value is incorrect and the correct fuse is 2.5 A.[3]
  • The Video adjustments set sub-contrast and brightness range to 31 foot-lamberts ±3 fL, measured with Apple's R77 (part 076-0310), L-248 or 246 light meter; the Light Meter Setup section gives the meter reading that corresponds to 31 fL on each model.[4]
  • The Monitor Stand symptom chart covers a stand that will not swivel (check that the "Front" marks on the tilt/swivel mechanism and base line up, and that the snap lock assembly is in place) or will not tilt (check the plastic plug in the snap lock).[5]
  • The Basics chapter is about environmental distortion of the raster, to be ruled out before adjusting or exchanging the monitor.[1]

Contents

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  • Basics: Monitor Distortion (PDF pp. 3-9)
  • Specifications: Characteristics, Controls, Physical and Electrical, Operating Environment (PDF pp. 11-15)
  • Troubleshooting: General; Symptom Charts for No Raster, Geometry, Synchronization, Video, Miscellaneous and Monitor Stand (PDF pp. 17-24)
  • Take Apart: Swivel Stand, Rear Cover, Access Cover, Video Board, Deflection Board, Power Supply, Fuse, On/Off Switch, Contrast/Brightness Assembly, Bezel, CRT, LED Assembly (PDF pp. 26-63)
  • Adjustments: Geometry, Video, Light Meter Setup (PDF pp. 65-96)
  • Exploded View (PDF p. 98)

What this manual does not contain

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No parts list, schematic, component values or power-supply rail figures.[1]

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Download: Twopage monochrome monitor.pdf

References

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  1. ↑ 1.0 1.1 1.2 Apple Computer, Apple Two-Page Monochrome Monitor (Service Source), 98 pp., 1995. Hosted as File:Twopage monochrome monitor.pdf.
  2. ↑ Apple Two-Page Monochrome Monitor Service Source, Specifications: Characteristics pp. 2-3, Controls p. 4, Physical and Electrical p. 5, Operating Environment p. 6 (PDF pp. 11-15).
  3. ↑ Apple Two-Page Monochrome Monitor Service Source, Take Apart, "Fuse" pp. 20-21 (PDF pp. 45-46).
  4. ↑ Apple Two-Page Monochrome Monitor Service Source, Adjustments, "Video" pp. 16-26 and "Light Meter Setup" pp. 27-32 (PDF pp. 80-96).
  5. ↑ Apple Two-Page Monochrome Monitor Service Source, Troubleshooting, Symptom Charts/Monitor Stand p. 8 (PDF p. 24).
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