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Macintosh 16 Color Display Service Source

From RetroTechCollection

The Macintosh 16" Color Display volume of Apple's Service Source is a 136-page service manual for Apple's 16-inch colour display. The PDF's creation date is 12 November 1995.[1]

Specifications

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Macintosh 16" Color Display specifications[2]
Item Value
Picture tube 17 in diagonal, 16 in viewable; Trinitron, 0.26 mm aperture-grille pitch; antiglare, anti-static coating
Resolution 832 × 624, 70 dpi; up to 256 colours with the Macintosh Display Card 8•24 or 8•24GC (Rev. B)
Scan rates Vertical 75 Hz; horizontal 50 kHz
Active display area 11.8 × 8.86 in (300 × 225 mm)
Input signals Analogue red, green and blue, RS-343
Controls and ports Power, brightness and contrast on the front; automatic degauss at power-on; three ADB ports, sound-in and sound-out, microphone and headphone ports in the base
Power supply Universal, 90-270 V AC self-configuring, 47-63 Hz, 130 W maximum
Size and weight 15.7 in (400 mm) high, 16 in (405 mm) wide, 16 in (405 mm) deep; 50 lb (23 kg)
Operating environment 10-35 °C; 95% RH maximum, non-condensing

Contents

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  • Basics (PDF pp. 3-9): monitor distortion
  • Specifications (PDF pp. 11-16)
  • Troubleshooting (PDF pp. 18-27): symptom charts for no raster, geometry, synchronisation, video and miscellaneous faults
  • Take Apart (PDF pp. 29-85): monitor stand and its cables, cover, focus control, EMI shield, CRT/video board, video cable, AC inlet assembly, main board, on/off switch, contrast/brightness board, CRT, LED assembly, bezel, fuse
  • Adjustments (PDF pp. 87-134): geometry set-up, horizontal, vertical, focus, convergence, video set-up, cutoff, white balance, light meter set-up
  • Exploded View (PDF pp. 135-136)

What it settles

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The Basics chapter says all large-screen monitors distort with their surroundings: nearby metal changes the effect of the earth's magnetic field at the screen edges, and fluorescent lights and appliances cause jitter. Apple says to check for environmental causes first, because swapping modules cannot fix environmental distortion and adjusting such a monitor alters the factory settings; move or turn the monitor, or try it in another building, before adjusting. Geometry set-up is done with the monitor facing magnetic east or west.[3]

There are two main-board revisions and they must be replaced like for like. If vendor part number A-1335-028 appears near connector D3, the replacement is 661-1634; otherwise it is the Rev. B board, 661-1671. When fitting a CRT/video board, switch SW1 must be set as shown, or the colour adjustments will be wrong and green will be oversaturated.[4]

The video set-up and white balance target 24 foot-lamberts (±3) on the all-white screen, and cutoff is set with the screen control RV508. Apple's adjustment tool is part number 949-0386.[5]

The exploded view gives Apple part numbers: CRT assembly 076-0563, CRT/video board 661-1635, main board 661-1634 or 661-1671 (Rev. B), fuse 922-0516, focus control 982-0139, AC inlet assembly 076-0077, contrast/brightness assembly 982-0127, video cable 590-0734 and base PC assembly 981-0029.[6] The fuse sits on the main board.[7]

The Take Apart procedures begin with discharging the CRT and warn never to use a grounding wrist strap until the CRT has been discharged. See CRT Discharge Procedure.[1]

What this manual does not contain

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There is no schematic, no component values and no fuse rating. There is no low-voltage supply adjustment or rail tolerance.[1]

Pages that cite this document

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Download: 16 color display.pdf

References

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  1. ↑ 1.0 1.1 1.2 Apple Computer, Inc., Macintosh 16" Color Display (Service Source), 136 pp. Hosted as File:16 color display.pdf.
  2. ↑ Macintosh 16" Color Display Service Source, Specifications, pp. 1-6 (PDF pp. 11-16).
  3. ↑ Macintosh 16" Color Display Service Source, Basics, Monitor Distortion, pp. 1-7 (PDF pp. 3-9), and Adjustments, Geometry Setup, pp. 1-3 (PDF pp. 87-89).
  4. ↑ Macintosh 16" Color Display Service Source, Take Apart, CRT/Video Board, p. 23, and Main Board, p. 40 (PDF pp. 51, 68).
  5. ↑ Macintosh 16" Color Display Service Source, Adjustments, Video Setup, pp. 21-23, and Cutoff, p. 30 (PDF pp. 107-109, 116).
  6. ↑ Macintosh 16" Color Display Service Source, Exploded View (PDF p. 136).
  7. ↑ Macintosh 16" Color Display Service Source, Take Apart, Fuse, pp. 56-57 (PDF pp. 84-85).
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