Apple AppleVision 850 Display
| AppleVision 850 Display | |
|---|---|
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|
| Apple's illustration of the AppleVision 850 (Service Source) | |
| Manufacturer | Apple Computer, Inc. |
| Type | 20-inch multiple-scan Trinitron colour monitor |
| Release date | 1997 |
| Interface | 15-pin miniature D-type video with separate sync and DDC, combined video/ADB cable; VGA adapter |
| Dimensions | 474 × 484 × 515 mm (H × W × D) |
| Weight | 30 kg (67 lb) |
| Model | M6162LL/A (order number of the 20-inch ColorSync Display, 1998) |
| Power | 90-264 V AC, 47-63 Hz, 150 W maximum |
| Resolution | 640 × 480 to 1600 × 1200 |
The AppleVision 850 Display is a 20-inch Trinitron monitor with a 19.0-inch viewable image that Apple introduced in 1997 as its high-end two-page display. It runs at resolutions from 640 × 480 up to 1600 × 1200, Apart from brightness and contrast, its picture, geometry and colour are set from the Macintosh through the AppleVision software.[1][2] In November 1997 Apple renamed it the 20" (19.0" VIS) ColorSync Display; the name was the only change.[2] The AppleVision 850AV is the same display with a speaker enclosure and a microphone.
Specifications
[edit | edit source]| Item | Value |
|---|---|
| Picture tube | 20-inch Trinitron, 19.0-inch viewable image; 0.26 mm stripe pitch, 0.25 mm grille pitch; multilayer anti-reflection panel |
| Preset resolutions | 640 × 480 at 60, 67, 72, 75 and 85 Hz; 800 × 600 at 56-85 Hz; 832 × 624 at 75 Hz; 1024 × 768 at 60-85 Hz and 87 Hz interlaced; 1152 × 870 at 75 Hz; 1280 × 1024 at 75 and 85 Hz; 1600 × 1200 at 75 Hz |
| Scan rates | Vertical 48-120 Hz; horizontal 30-94 kHz |
| Input | RGB with separate sync, DDC clock and data; video/ADB cable with a VGA adapter |
| Ports | Two ADB pass-through ports |
| Degauss | Automatic at power-on; manual by switching off and on |
| Power | 90-264 V AC, 47-63 Hz; 150 W maximum |
| Stand | Tilt −5° to +15°; swivel at least ±45° |
| Size and weight | 474 mm high, 484 mm wide, 515 mm deep (± 3 mm); 30 kg (67 lb) |
| Operating environment | 10-40 °C; 20-95% humidity, non-condensing; up to 3,048 m (10,000 ft) |
Apple's August 1997 product guide gives 18.7 × 19.1 × 20.2 in and 67.4 lb (30.6 kg); the 1998 data sheet bound into the Service Source gives 30.6 kg and the order number M6162LL/A for the renamed 20-inch ColorSync Display.[1][3] The AppleVision software needs a 68040 or later processor and System 7.1 or later.[3]
Software control
[edit | edit source]There are no internal geometry or colour controls for the user. Brightness and contrast are on the front panel; everything else (geometry, convergence, colour and white point) is set through the Monitors & Sound control panel, which talks to the display over ADB. Apple's service manual stresses that the display's ADB and video cables must both be connected to the computer.[4] The user's manual says the power light is green in use and amber in energy-saving mode, and that restarting with Command-Option-A-V held down resets the display to its factory settings.[5] The display's set-up data lives on its CRT/video board, and Apple's service procedures read and write it with the Display Service Utility.[2]
Hardware
[edit | edit source]Both the 850 and the 850AV use the same main deflection board (661-1213) and CRT/video board (661-1312). The 850 has an ADB board (922-2727) in its bottom housing and a blank plate where the 850AV has its microphone.[6] From January 1998 the 20-inch ColorSync Display (not the AV model) was built with TCO 95 plastics, marked on the rear housing, which Apple replaces like for like.[2]
The CRT anode runs at 27 kV.[7] Follow the CRT Discharge Procedure before working inside.
Known faults
[edit | edit source]- Apple's service manual notes that many modules returned for repair worked, and puts set-up, software and environmental checks first.[4]
- A screen that freezes at startup, and corrupted set-up data, can be caused by the yoke wires to BF1 and BL1 on the main deflection board being clamped in with the ribbon cables.[4]
- One owner's 850AV would only display properly at 1024 × 768 and 60 Hz, giving a narrow, distorted picture in other modes; capacitors, the sync processor (a TDA4858 on the neck board) and its supply were checked without curing it. Another owner with an AppleVision 1710 found a similar fault in the control logic on the neck board and cleared it with new capacitors in the digital section and a blank 93C66 EEPROM, after which the display behaved as a plain multiple-scan monitor.[8]
Maintenance and repair
[edit | edit source]- Apple AppleVision 850 Display General Maintenance: cleaning, software adjustment, the hand-set focus and convergence controls, high voltage and the Display Service Utility. Covers the 850 and 850AV.
- Apple AppleVision 850 Display Troubleshooting Guide: Apple's symptom charts and hardware diagnosis.
- Apple AppleVision 850 Display Capacitor Replacement Guide: an owner's list of the electrolytic capacitors on the main deflection board.
Documentation
[edit | edit source]- 20" ColorSync Displays Service Source: Apple's 177-page Service Source for the 850 and 850AV.
- AppleVision 850 and 850AV Displays User's Manual: set-up, AppleVision software, use with Windows, care and user troubleshooting.[5]
Gallery
[edit | edit source]-
Exploded view with part numbers for both models (Apple Service Source) -
Main deflection board with electrolytic capacitors marked (photo: Elemenoh, TinkerDifferent)
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Related pages
[edit | edit source]References
[edit | edit source]- ↑ 1.0 1.1 Apple Computer, Apple Facts 8.97, August 1997: introduction of the AppleVision 850 and 850AV as new two-page displays, and the AppleVision 850 and 850AV entries, pp. 114-115. archive.org item applefacts8.97august1997ocr.
- ↑ 2.0 2.1 2.2 2.3 Apple Computer, 20" ColorSync Displays (Service Source), hosted as File:Colorsync 20 displays.pdf. Basics: product name change p. 1, overview pp. 2-4, Display Service Utility pp. 5-6, TCO 95 housing p. 7 (PDF pp. 8-14).
- ↑ 3.0 3.1 3.2 20" ColorSync Displays Service Source, Specifications, pp. 2-23 (PDF pp. 17-38), and Apple ColorSync Displays data sheet L02722C, May 1998 (PDF pp. 39-40).
- ↑ 4.0 4.1 4.2 20" ColorSync Displays Service Source, Troubleshooting, First Checklist and Symptom Charts, pp. 2-9 (PDF pp. 43-50).
- ↑ 5.0 5.1 Apple Computer, AppleVision 850 and 850AV Displays User's Manual, hosted as File:AppleVision 850 and 850AV Displays Users Manual.pdf. Setting up chapter 1 (PDF pp. 1-24); tips and troubleshooting chapter 5 (PDF pp. 65-80).
- ↑ 20" ColorSync Displays Service Source, Exploded View (PDF p. 177).
- ↑ 20" ColorSync Displays Service Source, Troubleshooting, Checking High Voltage, pp. 18-19 (PDF pp. 59-60).
- ↑ AppleVision 850AV Repair, TinkerDifferent forum (Elemenoh, marmotta and others), 2022-11 to 2024-01—link(accessed 2026-10-02) Community repair thread with a capacitor list for the main deflection board.