Apple Color RGB Monitor
| AppleColor RGB Monitor | |
|---|---|
 |
|
| AppleColor RGB Monitor (A2M6014) | |
| Manufacturer | Apple Computer (made in Japan) |
| Type | 12-inch analogue RGB colour monitor |
| Interface | Analogue RGB with composite sync, 15-pin D connector |
| Compatible | Apple IIGS |
| Model | A2M6014 |
| Power | 108-132 V AC, 50-60 Hz; 90 W maximum |
The AppleColor RGB Monitor (A2M6014) is Apple's 12-inch analogue RGB colour monitor for the Apple IIGS. It connects to the IIGS's RGB video port through a 15-pin D cable and shows the computer's 640 × 200 graphics and up to 80 columns of text.[1] Its owner's guide carries a 1986 copyright,[2] and the rating label on a surviving example reads "Manufactured September 1986" and "Made in Japan".[3] The Apple Monochrome Monitor uses a similar platinum case.
The monitor contains a colour CRT and a power supply board with high voltages on it. Read CRT Discharge Procedure before opening it.
Specifications
[edit | edit source]| Item | Value |
|---|---|
| Picture tube | 12 in diagonal (11.5 in viewable), high-contrast black matrix; 0.37 mm tri-dot pitch |
| Display | 640 × 200 dots with the Apple IIGS; up to 80 characters by 25 lines |
| Active display area | 200 mm × 150 mm |
| Interface | 15-pin D-style connector; direct connection to the IIGS with the supplied cable |
| Sync input | Composite horizontal and vertical pulses, negative-going, 3.0 V minimum p-p into 2,200 Ω |
| Video input | 1.0 V ±0.1 V p-p into 75 Ω |
| Video bandwidth | Flat within 1.5 dB to 6.5 MHz; less than 3 dB down at 8 MHz |
| Scan rates | 15.7 kHz horizontal, 60 Hz vertical |
| Controls | Side: power, contrast, brightness. Rear: horizontal hold, vertical hold, height |
| Mains | 108-132 V AC, 50-60 Hz |
| Power | Typically less than 65 W; 90 W maximum |
| Operating temperature | 0-50 °C |
| Size | 27.9 cm high, 34.3 cm wide, 40.6 cm deep |
| Weight | 12.5 kg (27.6 lb) |
The label on the 1986 example gives the US rating as 120 V, 50/60 Hz, 1 A.[3] Apple also made 220 V and 240 V versions, which have their own CRT assemblies, power supply board and power switch.[4]
Hardware
[edit | edit source]Apple's service manual divides the monitor into a CRT assembly with its degaussing coil, a CRT video board on the tube neck, and a main logic board, which the parts list calls the power supply board and which also carries the deflection circuits and the flyback transformer. The switch panel with the power switch and the brightness and contrast controls is screwed to the rear cover and wired to both boards.[5] The schematic shows an AN5356 video processor (IC601), an LA7822 vertical deflection IC (IC501) and an LA7824 horizontal IC (IC401).[6]
The CRT video board is held to the tube neck with silicone glue, and its focus and screen wires are soldered to it. On the main logic board the internal controls are vertical hold VR401, vertical linearity VR402, height VR403, vertical centring VPOS1 and VPOS2, horizontal centring VR501, horizontal hold VR502, width coil L552 and focus on the flyback. The colour controls are red, green and blue cut-off, red and blue drive (there is no green drive) and sub-contrast, with the screen control and a service switch (S691) used together when setting cut-off.[7]
Apple service parts include the 3.15 A fuse F901 (740-0309 for 110 V, 740-0061 250 V), power supply board 661-0348 (110 V) or 661-0358 (220/240 V), CRT video board 661-0347, CRT assemblies 076-0207 (110 V), 076-0232 (220 V) and 076-0233 (240 V), the RGB video cable 590-0536 and the AC cord 935-0002.[4]
The horizontal hold is protected: if VR502 is turned too far either way, the monitor shuts itself down. Switch off, centre the control, wait 30 seconds and start again.[8]
Known faults
[edit | edit source]Apple's troubleshooting table names the boards to replace. A few entries point to simpler causes: a single horizontal line can be the internal service switch S691 left in its upper position; flashing or a wavy screen is cured by gently crimping the metal tabs of the video connector; jittering characters call for checking the ground straps and the grounding of nearby equipment; and a monitor that shuts down can be a misadjusted horizontal hold.[9] See Apple Color RGB Monitor Troubleshooting Guide.
Documentation
[edit | edit source]Apple's Technical Procedures, the owner's guide, the 1989 data sheet and the schematic are hosted and described on Apple Color RGB Monitor Documentation.
Gallery
[edit | edit source]-
Rating label, September 1986
Related pages
[edit | edit source]- Apple Color RGB Monitor General Maintenance
- Apple Color RGB Monitor Troubleshooting Guide
- Apple Color RGB Monitor Documentation
- Apple Monochrome Monitor
- Apple Composite Monitor, Apple's composite colour monitors for the IIe and IIc
- CRT Discharge Procedure
References
[edit | edit source]- ↑ 1.0 1.1 Apple Computer, AppleColor RGB Monitor data sheet, April 1989, A9F0005/A. Hosted here: File:AppleColor RGB Monitor Data Sheet 1989.pdf.
- ↑ Apple Computer, AppleColor RGB Monitor Owner's Guide, 1986, 030-3106-B. Hosted here: File:AppleColor RGB Monitor Owner's Guide 030-3106-B.pdf.
- ↑ 3.0 3.1 Rating label photographed by Akbkuku, File:AppleColor RGB Monitor A2M6014 rating label.jpg.
- ↑ 4.0 4.1 Apple Computer, AppleColor RGB Monitor Technical Procedures, in Apple Service Technical Procedures: Apple II Family, Volume Two, 072-0229, November 1991 build, Illustrated Parts List, pp. 5.3-5.11 (PDF pp. 63-71). Hosted here: File:AppleColor RGB Monitor Technical Procedures.pdf.
- ↑ AppleColor RGB Monitor Technical Procedures, Take-Apart, pp. 2.1-2.26 (PDF pp. 9-34).
- ↑ AppleColor RGB Monitor (A2M6014) schematic diagram, three sheets. Hosted here: File:AppleColor RGB Monitor A2M6014 Schematic.pdf.
- ↑ AppleColor RGB Monitor Technical Procedures, Adjustments, pp. 3.1-3.16 (PDF pp. 35-50).
- ↑ AppleColor RGB Monitor Technical Procedures, Adjustments, Horizontal Adjustments, p. 3.7 (PDF p. 41).
- ↑ AppleColor RGB Monitor Technical Procedures, Troubleshooting, pp. 4.7-4.9 (PDF pp. 57-59).