Editing Apple AppleVision 850AV Display

{{Infobox computer peripheral
| name         = AppleVision 850AV Display
| image        = [[File:AppleVision 850AV Display (Apple Service Source).png|260px|frameless]]
| caption      = 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
| resolution   = 640 × 480 to 1600 × 1200
| power        = 90-264 V AC, 47-63 Hz, 190 W maximum
| dimensions   = 553 × 484 × 545 mm (H × W × D)
| weight       = 35 kg (77 lb)
}}
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The '''AppleVision 850AV Display''' is the [[Apple AppleVision 850 Display|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.<ref name="ssbasics">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).</ref><ref name="ssev">''20" ColorSync Displays'' Service Source, Exploded View (PDF p. 177).</ref> 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.<ref name="af97">Apple Computer, ''Apple Facts'' 8.97, August 1997: AppleVision 850 and 850AV entries, pp. 114-115. archive.org item [https://archive.org/details/applefacts8.97august1997ocr applefacts8.97august1997ocr].</ref><ref name="ssbasics" />

Everything except the sound hardware is covered on the [[Apple AppleVision 850 Display|AppleVision 850]] page and in the shared guides listed below.

== Sound hardware ==
{| class="wikitable styled-table" style="width:70%; text-align:left;"
|+'''850AV audio specifications'''<ref name="ssaud">''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).</ref>
! 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.<ref name="ssev" /> 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.<ref name="ssta">''20" ColorSync Displays'' Service Source, Take Apart, pp. 1-109 (PDF pp. 65-173).</ref>

== Size and weight ==
Apple's Service Source gives 553 × 484 × 545 mm (± 3 mm) and 35 kg (77 lb).<ref name="ssaud" /> The August 1997 ''Apple Facts'' gives 21.8 × 19.1 × 23.4 in and 92.0 lb (41.9 kg).<ref name="af97" /> The TCO 95 housing parts that Apple introduced in January 1998 were for the 20-inch ColorSync Display only, not the AV model.<ref name="ssbasics" />

== Maintenance and repair ==
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.<ref name="sshv">''20" ColorSync Displays'' Service Source, Troubleshooting, Checking High Voltage, pp. 18-19 (PDF pp. 59-60).</ref>

== Documentation ==
* [[20" ColorSync Displays Service Source]]
* [[AppleVision 850 and 850AV Displays User's Manual]], including connecting sound equipment to the 850AV.<ref name="um">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.</ref>

== Related pages ==
* [[Apple AppleVision 850 Display]]
* [[Apple AppleVision 1710AV Display]]
* [[Apple AudioVision 14 Display]]

== References ==
<references />

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[[Category:Apple Vintage Accessories]]