17" ColorSync Displays Service Source
The 17" ColorSync Displays volume of Apple's Service Source is a 156-page service manual for the AppleVision 750 and AppleVision 750AV 17-inch Trinitron displays, which Apple renamed in November 1997. The body of the manual keeps the AppleVision names; the chapter title pages carry both.[1][2] Its Hot Issues notices are dated December 1997 and March 1998.[3]
 | The CRT anode runs at about 26 kV. Follow CRT Discharge Procedure before working inside the display. Apple's procedures discharge the CRT before any board is removed and say not to put on a grounding wrist strap until the CRT has been discharged.[4][5] |
| Original name | Name from November 1997 |
|---|---|
| AppleVision 750 Display | 17" (16.1" VIS) ColorSync Display |
| AppleVision 750AV Display | 17" (16.1" VIS) ColorSync AV Display |
Apple states that the name was the only change to the product. VIS is the diagonal viewable image size.[2] The 750AV adds a sound enclosure with stereo speakers and a microphone; otherwise the two models share their features.[6]
Specifications
[edit | edit source]| Item | Value |
|---|---|
| Picture tube | 17-inch Trinitron, 16.1-inch diagonal viewable image, 0.26 mm stripe pitch, multiple scan, antistatic and antiglare treatment |
| Resolutions | 640 × 480 at 60 Hz (VGA) and 66.67 Hz; 800 × 600 at 60.31 and 75 Hz; 832 × 624 at 74.55 Hz; 1024 × 768 at 60 and 74.93 Hz; 1152 × 870 at 75 Hz; 1280 × 1024 at 60 and 75.03 Hz |
| Scan rates | Vertical 40-120 Hz; horizontal 30-80 kHz |
| Input | RGB with separate sync on a 15-pin miniature D-type connector |
| Ports | Two ADB pass-through ports; 750AV also headphone/speaker output and microphone input |
| Speakers (750AV) | Stereo, bass reflex; 92 dB SPL at 1 kHz at 0.5 m; 70 Hz-20 kHz ±6 dB; line input up to 4 V p-p, microphone input down to 20 mV p-p |
| Degauss | Automatic at power-on; manual by switching off and on |
| Mains | 100-120 V AC and 220-240 V AC, 50-60 Hz |
| Power | 750: 130 W maximum; 750AV: 190 W maximum |
| Size and weight (750) | 425 mm H × 410 mm W × 455 mm D; 22.5 kg (50 lb) |
| Size and weight (750AV) | 485 mm H × 410 mm W × 485 mm D; 27 kg (60 lb) |
| Operating environment | 10-40 °C; 20-80% RH non-condensing; up to 3,048 m (10,000 ft) |
The specifications chapter also prints horizontal and vertical timing for each preset resolution and the list of Macintosh models supported by the AppleVision software, which needs a 68040 or later processor and System 7.1 or later.[7] The Apple data sheet bound in after it, dated May 1998 (L02722C), covers both the 17-inch and 20-inch ColorSync Displays and gives different electrical figures: 90-264 V AC, 47-63 Hz and 125 W maximum for the 17-inch model, with order number M6159LL/A.[8] Check the rating plate on the unit.
Contents
[edit | edit source]- Hot Issues (PDF pp. 2-8): revised Troubleshooting chapter with the CRT/video board procedures, and the CRT/video board (661-1373) offered worldwide as a replacement module (3/98); jittery or blurry video with the Power Macintosh 5500 and 6500 (12/97)
- Basics (PDF pp. 9-16): product name change, product overview, repair issues for the Display Service Utility and the TCO 95 housing
- Specifications (PDF pp. 17-32): characteristics and monitor timings, speakers (750AV), controls and ports, physical and electrical, environmental
- Data sheet (PDF pp. 33-34)
- Troubleshooting (PDF pp. 35-56): first checklist; symptom charts for no raster, geometry, screen colour, screen brightness, focus, audio (750AV) and miscellaneous; downloading setup parameters and replacing the CRT/video board; adjusting the display after replacing the CRT/video board or the main deflection board; checking high voltage; diagnosing a suspected hardware problem, with a flowchart
- Take Apart (PDF pp. 57-125): model differences; microphone assembly/blank plate; sound enclosure, sound enclosure bezel, speakers, audio cable and sound board (750AV); bottom housing and ADB board (750); rear housing, CRT/video board, main deflection board, intermediate board, video cable and strain relief, on-screen display board, front bezel
- Adjustments (PDF pp. 126-154): the Monitors & Sound control panel; brightness and contrast, geometry, colour, sound (750AV) and the Control Strip
- Exploded View (PDF p. 156)
What it settles
[edit | edit source]The display's setup parameters are stored on the CRT/video board and handled from a Macintosh over ADB with Apple's Display Service Utility (version 4.2.1 at the March 1998 notice). Before the CRT/video board is replaced, fit the jumper from kit 076-0529 to connector BV1, next to the BV2 ribbon cable, and use the utility's Create File to download the parameters to a file named Parameter Settings 750, which takes about three minutes. Back the file up without moving or renaming the original, move the jumper to the new board, and upload the file with Write File. Geometry, convergence and a white-point recalibration (default 9300) follow.[3][9] High voltage can only be adjusted with the Display Service Utility.[10]
Focus, H-Stat and top and bottom convergence are set by hand: H focus and V focus on the flyback transformer with a plastic adjustment tool, H-Stat with a hex tool at the lower left of the CRT/video board, and top and bottom convergence at the back of the CRT/video board.[11]
The high-voltage check needs Apple's high-voltage probe, part 076-0392; Apple says other probes will not read accurately for this procedure. With the display off for at least two minutes, the rear housing off and the probe's ground lead secured to the chassis, the probe goes under the anode cap from the rear of the CRT. At power-on the meter should read 26 V DC, which is 26 kV. A reading of 0 V means the main deflection board.[4] After a main deflection board is replaced, Apple sets the high voltage to 26 kV with the utility's slider and then adjusts focus, at 1024 × 768 first and then in the other two Macintosh modes.[12]
If the utility cannot talk to the display, measure between chassis ground and the end of resistor RL1 (390 Ω) nearest capacitor CP17 on the main deflection board. A reading of 11.5-12.5 V points to the CRT/video board; anything outside that range points to the main deflection board.[13] On the 750AV, the microphone connector inside the bezel, and connector BA10 on the sound board, should read 8 V DC with the microphone unplugged.[14]
Things that are not faults: the two thin horizontal lines across the picture are the support wires of the Trinitron aperture grille; a raster that is not a perfect rectangle is within CRT tolerance; a black screen after a restart is cleared by switching the display off and on and does no permanent damage.[15][14] Jittery video on a Power Macintosh 5500 (serials TY705 to TY715) or 6500 (XB708 to XB718), and blurry video on a 6500 (XB708 to XB723), is a fault in the computer, and the 6500 should not be set above 1152 × 870.[3] Apple notes that many modules returned for repair were fully operational, and asks for a 20-minute warm-up before any adjustment. It also warns against using another AppleVision or ColorSync display as the known-good test monitor.[15]
Since January 1998 the 17-inch ColorSync Display (not the AV model) has used TCO 95 plastics, marked on the rear housing. These parts are replaced like for like: ADB board panel 076-0723, front bezel 922-3335, rear housing 922-3338, bottom housing 922-3343 and blank plate 922-3387.[16] The exploded view gives the other service part numbers, including the CRT/video board (661-1373), main deflection board with chassis (661-1374), intermediate board (922-3138), sound board (922-3158), on-screen display switches board (922-1511), ADB/video cable (922-2023) and power cord (590-0380).[17]
What this manual does not contain
[edit | edit source]There is no schematic, no component values and no fuse rating. Board faults are cured by replacing the main deflection board or the CRT/video board, and Apple notes that CRT/video board replacement was not supported in every country.[9] Apart from the anode voltage, the 12 V reading at RL1 and the 8 V microphone supply, the manual prints no internal voltages.
Pages that cite this document
[edit | edit source]- AppleVision 1710AV/1710 Service Source: the earlier AppleVision 17-inch displays, with the same Display Service Utility procedures
- 20" ColorSync Displays Service Source: the AppleVision 850 and 850AV, renamed at the same time
- Studio Display (17" CRT, 16" viewable image size) Service Source
- Apple Multiple Scan 17 Service Source
- Macintosh Color Display Service Source, Macintosh 16 Color Display Service Source, Macintosh 21 Color Display Service Source and Apple AudioVision 14 Display Service Source
Download: colorsync_17_displays.pdf (4.4 MB)
References
[edit | edit source]- ↑ Apple Computer, Inc., 17" ColorSync Displays (Service Source), 156 pp. Hosted as File:colorsync_17_displays.pdf.
- ↑ 2.0 2.1 2.2 17" ColorSync Displays Service Source, Basics, Product Name Change, p. 1 (PDF p. 10).
- ↑ 3.0 3.1 3.2 17" ColorSync Displays Service Source, Hot Issues, pp. 1-6 (PDF pp. 3-8).
- ↑ 4.0 4.1 17" ColorSync Displays Service Source, Troubleshooting, Checking High Voltage, p. 17 (PDF p. 52).
- ↑ 17" ColorSync Displays Service Source, Take Apart, CRT/Video Board, pp. 36-37 (PDF pp. 93-94).
- ↑ 17" ColorSync Displays Service Source, Basics, Product Overview, pp. 2-3 (PDF pp. 11-12).
- ↑ 7.0 7.1 17" ColorSync Displays Service Source, Specifications, pp. 2-15 (PDF pp. 19-32).
- ↑ 17" ColorSync Displays Service Source, Apple ColorSync Displays data sheet, May 1998, L02722C (PDF pp. 33-34).
- ↑ 9.0 9.1 17" ColorSync Displays Service Source, Troubleshooting, Downloading Setup Parameters and Replacing the CRT/Video Board, and Adjusting the Display after Replacing the CRT/Video Board, pp. 11-14 (PDF pp. 46-49).
- ↑ 17" ColorSync Displays Service Source, Basics, Repair Issue: Display Service Utility, pp. 4-6 (PDF pp. 13-15).
- ↑ 17" ColorSync Displays Service Source, Troubleshooting, Symptom Charts: Focus, pp. 7-8 (PDF pp. 42-43).
- ↑ 17" ColorSync Displays Service Source, Troubleshooting, Adjusting the Display after Replacing the Main Deflection Board, pp. 15-16 (PDF pp. 50-51).
- ↑ 17" ColorSync Displays Service Source, Troubleshooting, Diagnosing a Suspected Hardware Problem, pp. 18-21 (PDF pp. 53-56).
- ↑ 14.0 14.1 17" ColorSync Displays Service Source, Troubleshooting, Symptom Charts: Audio and Miscellaneous, pp. 9-10 (PDF pp. 44-45).
- ↑ 15.0 15.1 17" ColorSync Displays Service Source, Troubleshooting, First Checklist and Symptom Charts, pp. 2-5 (PDF pp. 37-40).
- ↑ 17" ColorSync Displays Service Source, Basics, Repair Issue: TCO 95 Housing, p. 7 (PDF p. 16).
- ↑ 17" ColorSync Displays Service Source, Exploded View (PDF p. 156).