Apple AppleVision 850AV Display
| AppleVision 850AV Display | |
|---|---|
.png) |
|
| Apple's illustration of the AppleVision 850AV with its speaker enclosure (Service Source) | |
| Manufacturer | Apple Computer, Inc. |
| Type | 20-inch multiple-scan Trinitron colour monitor with speakers and microphone |
| Release date | 1997 |
| Interface | 15-pin miniature D-type video with separate sync and DDC, combined video/ADB cable; audio cable |
| Dimensions | 553 × 484 × 545 mm (H × W × D) |
| Weight | 35 kg (77 lb) |
| Power | 90-264 V AC, 47-63 Hz, 190 W maximum |
| Resolution | 640 × 480 to 1600 × 1200 |
The AppleVision 850AV Display is the AppleVision 850 with a speaker enclosure under the screen and a microphone in the top of the bezel. It has the same 20-inch Trinitron tube with a 19.0-inch viewable image, the same main deflection board and CRT/video board, and the same resolutions, from 640 × 480 to 1600 × 1200.[1][2] Apple introduced the pair in 1997 and in November 1997 renamed this model the 20" (19.0" VIS) ColorSync AV Display, with no other change.[3][1]
Everything except the sound hardware is covered on the AppleVision 850 page and in the shared guides listed below.
Sound hardware
[edit | edit source]| Item | Value |
|---|---|
| Audio input | Up to 4 V p-p (line level) or as low as 4.4 mV p-p (microphone level) without clipping |
| Microphone | Directional, built in, for speech recognition and other voice uses; plus a microphone input port |
| Speakers | Stereo, ported (bass reflex) chambers; over 90 dB SPL at 1 kHz at 0.5 m; 80 Hz-17 kHz ± 6 dB; spatial enhancement circuit |
| Headphone output | Over 0.50 V RMS into 600 Ω, over 0.55 V RMS into 10 kΩ, with a 2 V p-p line input |
| Front-panel audio controls | Bass, treble, microphone on, volume and mute |
| Power | 190 W maximum (the 850 without speakers: 150 W) |
The sound board (922-2650) and a separate power board (922-2652) sit inside the sound enclosure (922-3051), with a heatsink, two speakers (922-3053), guide rails, left and right endcaps and an audio cable (922-3057) to the computer. The microphone (922-1502) replaces the 850's blank plate.[2] Apple's take-apart chapter has separate procedures for the sound enclosure, its bezel, the audio cable, endcaps, speakers, sound board and the heatsink and power board.[5]
Size and weight
[edit | edit source]Apple's Service Source gives 553 × 484 × 545 mm (± 3 mm) and 35 kg (77 lb).[4] The August 1997 Apple Facts gives 21.8 × 19.1 × 23.4 in and 92.0 lb (41.9 kg).[3] The TCO 95 housing parts that Apple introduced in January 1998 were for the 20-inch ColorSync Display only, not the AV model.[1]
Maintenance and repair
[edit | edit source]The two models share their service procedures:
- Apple AppleVision 850 Display General Maintenance
- Apple AppleVision 850 Display Troubleshooting Guide
- Apple AppleVision 850 Display Capacitor Replacement Guide: the main deflection board list there was taken from an 850AV.
The CRT anode runs at 27 kV; follow the CRT Discharge Procedure before working inside.[6]
Documentation
[edit | edit source]- 20" ColorSync Displays Service Source
- AppleVision 850 and 850AV Displays User's Manual, including connecting sound equipment to the 850AV.[7]
Related pages
[edit | edit source]References
[edit | edit source]- ↑ 1.0 1.1 1.2 Apple Computer, 20" ColorSync Displays (Service Source), hosted as File:Colorsync 20 displays.pdf. Basics: product name change p. 1, overview pp. 2-4 (PDF pp. 8-11).
- ↑ 2.0 2.1 20" ColorSync Displays Service Source, Exploded View (PDF p. 177).
- ↑ 3.0 3.1 Apple Computer, Apple Facts 8.97, August 1997: AppleVision 850 and 850AV entries, pp. 114-115. archive.org item applefacts8.97august1997ocr.
- ↑ 4.0 4.1 20" ColorSync Displays Service Source, Specifications: audio (AppleVision 850AV only) pp. 16-17; controls and ports pp. 18-19; physical and electrical pp. 20-21 (PDF pp. 31-36).
- ↑ 20" ColorSync Displays Service Source, Take Apart, pp. 1-109 (PDF pp. 65-173).
- ↑ 20" ColorSync Displays Service Source, Troubleshooting, Checking High Voltage, pp. 18-19 (PDF pp. 59-60).
- ↑ Apple Computer, AppleVision 850 and 850AV Displays User's Manual, hosted as File:AppleVision 850 and 850AV Displays Users Manual.pdf. Connecting sound equipment to the 850AV, chapter 1.