TITLE
    Macintosh 21" Color Display: Specifications (Discontinued 3/94)
Article ID:
Created:
Modified: 		8921
10/2/91
3/14/94
TOPIC


    This article gives the technical specifications for the Macintosh 21-inch Color Display, which Apple discontinued on 14 March 1994, replacing it with the Apple Multiple Scan 20 Display.

DISCUSSION


    System Requirements
    -------------------
    - Macintosh personal computer equipped with an appropriate video card
    - Video cable (supplied with the display)

    Optical Features
    ----------------
    - 20-inch diagonal viewable with in-line gun
    - 90 degree deflection angle
    - Black matrix-type dot screen
    - Phosphor type P22 (aluminized)
    - Flat, square faceplate with gray filter glass, 50% nominal light
    transmission
    - Shadow mask

    Screen Resolution
    -----------------
    - 1152 horizontal pixels by 870 vertical lines; 79 dots per inch (dpi)
    - .26 mm horizontal by .29 mm vertical dot pitch

    Input Signals
    -------------
    - Red, green, and blue video signals; TTL separate sync

    User Controls
    -------------
    - Back panel
    - Power switch (above power cord)
    - Manual degauss (above security lock)
    - Front panel
    - Brightness, with detent (right)
    - Contrast (left of brightness control)

    Scanning and Refresh Rates
    --------------------------
    - Horizontal scan rate: 68.7 kilohertz
    - Vertical refresh rate: 75 hertz

    Rise and Fall Time
    ------------------
    - Five nanoseconds, maximum

    Active Video Display Area
    -------------------------
    - 14.6 inches horizontal by 11.0 inches vertical (371 mm horizontal by 280
    mm vertical); remainder of display area is used for border.

    Electrical Requirements
    -----------------------
    - Voltage: 85 to 135 volts AC or 170 to 270 volts AC
    - Frequency: 47 to 63 hertz
    - Power: 165 watts maximum

    Fuse Protection
    ---------------
    - Internal power line fuse protection; the display fuse should be replaced
    with a fuse of the same type by a qualified service technician.

    Environmental Requirements
    --------------------------
    - Operating temperature: 50 to 95 degrees F (10 to 35 degrees C)
    - Operating humidity: 95% maximum, noncondensing
    - Maximum altitude: 10,000 feet (3,048 m)

    Size and Weight
    ---------------
    - Height: 18.5 inches (47.0 cm)
    - Width: 19.6 inches (49.8 cm)
    - Depth: 20.9 inches (53.0 cm)
    - Weight: 79.6 lb. (36.2 kg)

    Safety Agency Approvals
    -----------------------
    - Emissions: FCC (class A), VDE (class A), FTZ, CISPR, Swedish MPR
    magnetic (VLF and ELF)
    - Safety: UL, CSA, FDA/DHHS, Scandinavian EMKOs, PTB

    Article Change History:
    14 March 1994 - Added discontinuation information.

Document Information
Product Area: Monitors-Displays
Category: Macintosh Displays
Sub Category: Macintosh 21-inch Color Display

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