Apple Studio Display 21
| Apple Studio Display 21 | |
|---|---|
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|
| Studio Display (21-inch CRT) in the original blue and white housing (Apple Service Source) | |
| Manufacturer | Apple Computer, Inc. |
| Type | 21-inch colour CRT display (Sony Trinitron, aperture grille) |
| Release date | January 1999 |
| Discontinued | July 2000 |
| Interface | VGA-style video cable with VGA-to-Macintosh adapter; USB (four-port hub) |
| Compatible | USB-based 1999 Power Macintosh G3 and Power Mac G4 |
| Weight | 35 kg (77 lb) out of the box |
| Model | M6204LL/A (blue and white), M6204LL/B (graphite) |
| Power | 90-264 V AC, 47-63 Hz; 180 W maximum |
| Resolution | 640 × 480 to 1600 × 1200 at 85 Hz |
The Apple Studio Display 21, sold as the Apple Studio Display with ColorSync technology, is a 21-inch CRT monitor with a Sony Trinitron tube (19.8-inch viewable image) and a variable 0.25-0.27 mm aperture-grille pitch. It has a four-port USB hub, through which the computer controls its geometry and colour, and a translucent housing on a three-legged stand.[1] Apple sold the blue and white version, M6204LL/A, alongside the blue and white Power Macintosh G3 from January 1999 and a graphite version, M6204LL/B, from August 1999. The 21-inch model was dropped in July 2000.[1][2]
Specifications
[edit | edit source]| Item | Specification |
|---|---|
| Picture tube | 21 in Sony Trinitron, 19.8 in viewable; variable 0.25-0.27 mm aperture grille pitch |
| Resolutions | 640 × 480 at 60 Hz to 1600 × 1200 at 85 Hz |
| Horizontal scan | 31.5-106 kHz (Basics chapter); the data sheet in the same manual gives 31-107 kHz |
| Vertical scan | 48-120 Hz |
| Connections | VGA-style video cable with VGA-to-Macintosh adapter; four-port USB hub |
| Power | 90-264 V AC, 47-63 Hz; 180 W maximum operating, under 30 W in standby, under 5 W when the computer is in energy-saver mode |
| Weight | 35 kg (77 lb) out of the box |
| Standards | TCO 99; Energy Star |
Apple approved it for customers only with USB-equipped 1999 Power Macintosh G3 and Power Mac G4 computers. Its Service Source lists earlier PCI Power Macintosh models that can run it for service with a Keyspan USB card and Apple Displays Software 1.7.1 or later.[1]
Controls
[edit | edit source]The front panel has the power button, brightness and contrast up and down buttons, and a launcher button that opens the Monitors & Sound control panel. Geometry, colour and calibration are set in that control panel over USB, using the Apple Displays Software. An ambient light tool for ColorSync calibration came in the box.[1]
Hardware
[edit | edit source]Inside are a power board, a main deflection board, a CRT/video board on the neck of the tube, a USB assembly and a user controls board. The power board carries fuse FP1, 4 A 250 V (Apple 922-0502).[1] In November 1999 Apple changed the CRT/video board because a component had been discontinued. Version 1 is 661-2116 and version 2 is 661-2231, and the two are not interchangeable. A serial number of WR9451T8HOE or later (built after week 45 of 1999) has the version 2 board; the boards can also be told apart by their inductors (three on version 1, four on version 2), a capacitor in front of IV102 on version 1 only, and a post between board and shield on version 1 only.[1]
The display's set-up parameters live on the CRT/video board. Before that board is replaced, Apple's USB Display Service Utility downloads them to a file, which is then written to the new board.[1]
Housing parts differ between the two colours:[1]
| Part | M6204LL/A (blue and white) | M6204LL/B (graphite) |
|---|---|---|
| Rear housing | 922-3681 | 922-3914 |
| Bottom housing (with coloured control buttons) | 922-3723 | 922-3917 |
| Intermediate bezel | 922-3726 | 922-3916 |
| Front bezel | 922-3725 | 922-3913 |
| Product ID label | 922-3756 | 922-3918 |
| USB label | 922-3757 | 922-4055 |
A button panel kit, 076-0805, has the brightness and contrast buttons in both colours.[1]
Things that are not faults
[edit | edit source]- Two very thin horizontal lines, about a quarter to a third of the way from the top and bottom, are the damper wires that steady the aperture grille. Apple says all Trinitron-type displays over 15 inches have them.[1]
- An occasional popping sound, sometimes with the screen going blank for a moment, is arcing inside the CRT from loose particles, usually after transport; Apple says it does no harm and is more likely at high altitude.[1]
- Slight jitter at 1600 × 1200 with the ATI Rage 128 card in a blue and white Power Macintosh G3 is the card, not the display.[1]
Service figures
[edit | edit source]Apple's checks: 27 kV at the anode (27 V ± 0.5 V on the meter with Apple's probe 076-0392), and 6.7 V ± 0.05 V at the cathode of DP9 on the power board, set with PP1. See Apple Studio Display 21 General Maintenance and Apple Studio Display 21 Troubleshooting Guide, and read CRT Discharge Procedure before opening the display.[1]
Documentation
[edit | edit source]- Studio Display (21" CRT, 19.8" viewable image size) Service Source: Apple's 203-page Service Source, with the data sheets for both versions.
Related pages
[edit | edit source]- Apple Studio Display 21 General Maintenance
- Apple Studio Display 21 Troubleshooting Guide
- Apple Studio Display 17
- CRT Discharge Procedure
References
[edit | edit source]- ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 1.11 1.12 1.13 Apple Computer, Studio Display (21" CRT, 19.8" VIS) with ColorSync technology (Service Source), hosted as File:Studio display 21.pdf (see Studio Display (21" CRT, 19.8" viewable image size) Service Source). PDF page numbers: Overview and Features pp. 3-5; Repair Issues pp. 6-18 (weight and lifting p. 6, translucent housing p. 7, tripod stand p. 8, new housing colour and part numbers pp. 15-17, new CRT/video board p. 18); repair strategy pp. 19-22; Specifications: data sheets pp. 26-29; First Checklist pp. 32-33; Symptom Charts pp. 34-45; Checking High Voltage pp. 46-47; Two Versions of the CRT/Video Board p. 48; Take Apart pp. 51-154 (power board p. 90); Adjustments pp. 156-199; Exploded View p. 201.
- ↑ Wikipedia, "Apple Studio Display (1998–2004)" (retrieved 2026-10-02). 17-inch and 21-inch CRT Studio Displays introduced in January 1999 in blueberry and white with VGA connectors; graphite and white from August 1999; the 21-inch discontinued in July 2000. History only.