Apple Audiovision 14 Display Service Manual

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Apple AudioVision 14

Display

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Basics

Apple AudioVision 14 Display

Basics	Self-Threading Screws - 1

Self-Threading Screws

Caution: Improperly installed self-threading screws could damage the AudioVision 14 Display. Thread the screws properly and do not overtighten them.

The AudioVision 14 Display uses both machine screws and self-threading screws. Be aware of the following guidelines when you are replacing a self-threading screw:

• Never overtighten self-threading screws.

• Before tightening a self-threading screw, back the screw off slightly to be sure it is threaded properly.

Basics	Self-Threading Screws - 2
Machine Screw	Self-Threading Screw

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Specifications

Apple AudioVision 14 Display

Specifications	Characteristics - 1

Characteristics

Picture Tube

14-inch diagonal, 13-inch viewable screen Trinitron CRT

.26-mm pitch aperture grille

Screen Resolution

Scan Rates

Active Video

Display Area

640x480

Horizontal scan rate: 35.0 kHz Vertical refresh rate: 66.7 Hz

9.3 in. by 6.9 in.

(235 mm by 176 mm)

	Specifications	Characteristics - 2
Video Input Signals		Red, green, and blue video signals;.714 V peak to peak; white
		positive
		Composite synchronization, negative-going TTL

Audio Input Signals

Microphone

Speakers

Accepts audio signal of up to 6 Vpp (line level—low sensitivity) or as low as 20 mVpp (microphone level—high sensitivity) without clipping the signal, depending upon the level and sensitivity setting

Directional, optimized for use in speech recognition and other voice-related applications

Stereo, with ported (base reflex) chamber design Minimum loudness: 90 dB SPL at 1 kHz at 0.5 m Frequency response: 100 Hz–15 kHz ± 3dB

	Specifications	Characteristics - 3
Headphone Jack		Output level: 1.75 Vpp into 4 ohm load and 2 Vpp into 10 k ohm
		load

Specifications	Controls - 4

Controls

User Controls

Front Keypad: Contrast, brightness, and volume keys; mute button; microphone button

Back panel: On/off switch

Specifications	Electrical - 5

Voltage

Frequency

Power

Electrical

100–240 VAC ± 10%

50–60 Hz ± 3%

55 W maximum, all line conditions

The monitor contains internal power-line fuse protection. This fuse should be replaced with the same type by a qualified

service technician.

	Specifications	Physical - 6
		Physical
Size		Height: 13 in. (330 mm)
		Width: 13.5 in. (344 mm)
		Depth: 15.5 in. (394 mm)

Weight

Warm-Up Time

33 lb. (15 kg)

20 minutes required to meet all specifications

Specifications	Environmental - 7

Environmental

Operating

Temperature

Relative Humidity

50–104°F (10–40°C)

90% maximum, noncondensing

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Troubleshooting

Apple AudioVision 14 Display

Troubleshooting	General - 1

General

The Symptom Charts included in this chapter will help you diagnose specific symptoms related to your product. Because cures are listed on the charts in the order of most likely solution, try the first cure first. Verify whether or not the product continues to exhibit the symptom. If the symptom persists, try the next cure. (Note: If you have replaced a module, reinstall the original module before you proceed to the next cure.)

If you are not sure what the problem is, or if the Symptom Charts do not resolve the problem, refer to the Flowchart for the product family.

For additional assistance, contact Apple Technical Support.

Troubleshooting Symptom Charts/No Raster - 2

Symptom Charts

No Raster

No raster, LED off	1	Ensure monitor’s video cable is connected to the computer or
		the video card in the computer.
	2	Check power cable connections and power switch.
	3	Check all connections on main board.
	4	Replace blown fuse.
	5	Replace main board.
No raster, LED on,	1	Ensure monitor’s video cable is connected to the computer or
CRT filament on		the video card in the computer.
	2	Adjust contrast and brightness knobs.
	3	Connect known-good monitor and verify that built-in video
		signal or video card is working properly.
	4	Check all connections on main board. Make sure video
		connector is secure and wires are inside plastic connector.
	5	Perform video adjustments. Refer to “Video” in Adjustments
		chapter.
	6	Replace main board.
	7	Replace CRT.

Troubleshooting Symptom Charts/Geometry - 3

Geometry

Raster too short, tall,	1	Adjust vertical or horizontal size controls. Refer to
narrow, or wide		“Geometry” in Adjustments chapter.
	2	Replace main board.
Raster not centered	1	Move unit away from monitors, fluorescent lights, or other
		electrical equipment.
	2	Adjust vertical or horizontal center controls. Refer to
		“Geometry” in Adjustments chapter.
	3	Replace main board.
Horizontal linearity	Replace main board.
bad (size of text
differs at sides of
screen)

		Troubleshooting		Symptom Charts/Geometry (Continued) - 4
			Geometry (Continued)
Vertical linearity bad			Replace main board.
(size of text differs at
top vs. bottom of
screen)
Abnormal or			1	Move unit away from monitors, fluorescent lights, or other
distorted raster				electrical equipment.
			2	Perform geometry adjustments. Refer to “Geometry” in
				Adjustments chapter.
			3	Replace main board.
			4	Replace CRT (rarely required).

	Troubleshooting		Symptom Charts/Geometry (Continued) - 5
		Geometry (Continued)
Entire raster is tilted		1	Move unit away from monitors, fluorescent lights, or other
			electrical equipment.
		2	Perform geometry adjustments. Refer to “Geometry” in
			Adjustments chapter.
		3	Perform geometric distortion adjustments. Refer to
			“Geometric Distortion” in Adjustments chapter.
		4	Replace main board.

Troubleshooting Symptom Charts/Synchronization - 6

Synchronization

Picture breaks into	1	Connect known-good monitor and verify that built-in video
diagonal lines		signal or video card is working properly.
	2	Replace main board.
Picture rolls	1	Connect known-good monitor and verify that built-in video
vertically		signal or video card is working properly.
	2	Replace main board.
Picture breaks and	1	Connect known-good monitor and verify that built-in video
rolls horizontally		signal or video card is working properly.
	2	Replace main board.

Troubleshooting Symptom Charts/Synchronization (Continued) - 7

	Synchronization		(Continued)
Black raster with	1	Replace main board.
single vertical or	2	Replace CRT.
horizontal line

Troubleshooting Symptom Charts/Video - 8

Video

Raster too dark, too	1	Adjust external contrast and brightness controls.
bright, or washed out	2	Connect known-good monitor and verify that built-in video
		signal or video card is working properly.
	3	Perform video adjustments. Refer to “Video” in Adjustments
		chapter.
	4	Replace main board.
	5	Replace CRT (rarely required).
Out of focus	1	Perform focus adjustment. Refer to “Video” in Adjustments
		chapter.
	2	Replace main board.
	3	Adjust focus controls to their limits. If bad focus remains on
		one part of display, replace CRT.

	Troubleshooting		Symptom Charts/Video (Continued) - 9
		Video (Continued)
Predominant color		1	Check video card in computer.
tint		2	Perform video adjustments. Refer to “Video” in Adjustments
			chapter.
		3	Replace main board.
		4	Replace CRT (if you cannot eliminate red, green, or blue
			tint).
Out of convergence		1	Connect known-good monitor and verify that built-in video
(color bleeding out			signal or video card is working properly.
from text or lines)		2	Perform convergence adjustments. Refer to “Video” in
			Adjustments chapter.
		3	Replace main board.
		4	Replace CRT.

Troubleshooting Symptom Charts/Audio - 10

Audio

Sound comes out of	One of sound output options may be set to Stereo when your
only one speaker	computer is only capable of Mono sound output.
Internal microphone	1	To turn on microphone, press microphone button on keypad.
doesn’t record		Microphone-on LED lights up when microphone is on.
	2	Make sure that monitor is selected as sound input and
		playback source.
No sound or volume is	1	Verify that external sound sources are securely connected to
too low		monitor’s sound-out port.
	2	Press volume key on keypad.
	3	Press mute button to turn mute off.
	4	Press microphone button to turn microphone off.

Troubleshooting Symptom Charts/Miscellaneous - 11

Miscellaneous

Picture jitters or	1	Move unit away from monitors, fluorescent lights, or other
flashes		electrical equipment.
	2	Check that all ground cables are secure.
	3	Replace main board.
Intermittently shuts	Replace main board.
down
Flashing or wavy	Replace main board.
screen
Black screen spots	Replace CRT.
(burnt phosphor)

Troubleshooting Symptom Charts/Miscellaneous (Continued) - 12

	Miscellaneous	(Continued)
Monitor emits high-	Replace main board.
pitched noise
Does not degauss	Replace main board.
Erratic or no	Replace keyboard cable, keyboard, mouse, or other ADB device.
communication with
ADB device
Moving and clicking a	Some models of Logitech mice are incompatible with this display.
Logitech mouse has no	Refer customers to Logitech for information on mouse
effect on screen, but	compatibility and upgrades. The display is not at fault; do not
keyboard input is	replace it.
accepted

Troubleshooting Symptom Charts/Miscellaneous (Continued) - 13

	Miscellaneous (Continued)
Thin horizontal line	Displays smaller than 15 inches with tron-style CRTs typically
on screen	have a single horizontal grid wire about one-third of the way from
	the bottom of the display image. This supporting wire, which is
	thinner than a human hair, stabilizes the aperture grill against
	shocks. The line is common to all tron-style displays and is not a
	screen defect. It cannot be adjusted out or eliminated by repairing
	or replacing display modules.

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Take Apart

Apple AudioVision 14 Display

Take Apart	Rear Cover - 1

Rear Cover

Rear Cover

No preliminary steps are r equired before you begin this procedure.

1With the monitor facedown on a protective pad, swivel the monitor stand to access the two rear cover screws.

2Using a T-15 torx driver, remove the screws.

Take Apart		Rear Cover - 2
	Rear Cover	3 Move the monitor so
		that the microphone is
		toward you.
		4 Note: The locking tabs
		are located 1.5 inches in
		from the sides of the
		rear cover.
		Press down on the
		locking tabs. Using the
		pull-apart tool, pry
	Microphone	apart the sides of the
		rear cover.
	Locking Tab
Bezel	Locking Tab
	Pull-Apart Tool

Take Apart

Rear

Cover

Rear Cover - 3

5 Lift off the rear cover.

Replacement Note: Line up the rear cover

Groove grooves with the base assembly guides and slide on the rear cover.

Guide