Apple Audiovision 14 Display Service Manual
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Apple AudioVision 14
Display
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Service Source
Basics
Apple AudioVision 14 Display
Basics Self-Threading Screws - 1
Self-Threading Screws
Caution:
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
Improperly installed self-threading screws could
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
Screen Resolution
Scan Rates
Active V ideo Display Area
14-inch diagonal, 13-inch viewable screen
Trinitron CRT
.26-mm pitch aperture grille
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
Audio Input Signals
Microphone
Speakers
Red, green, and blue video signals;.714 V peak to peak; white
positive
Composite synchronization, negative-going TTL
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
Electrical
Voltage
Frequency
Power
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
Weight
W arm-Up Time
Height: 13 in. (330 mm)
Width: 13.5 in. (344 mm)
Depth: 15.5 in. (394 mm)
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,
CRT filament on
1 Ensure monitor’s video cable is connected to the computer or
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,
narrow, or wide
Raster not centered 1 Move unit away from monitors, fluorescent lights, or other
Horizontal linearity
bad (size of text
differs at sides of
screen)
1 Adjust vertical or horizontal size controls. Refer to
“Geometry” in Adjustments chapter.
2 Replace main board.
electrical equipment.
2 Adjust vertical or horizontal center controls. Refer to
“Geometry” in Adjustments chapter.
3 Replace main board.
Replace main board.
Troubleshooting Symptom Charts/Geometry
(Continued) - 4
Vertical linearity bad
(size of text differs at
top vs. bottom of
screen)
Abnormal or
distorted raster
Geometry
Replace main board.
1 Move unit away from monitors, fluorescent lights, or other
electrical equipment.
2 Perform geometry adjustments. Refer to “Geometry” in
Adjustments chapter.
3 Replace main board.
4 Replace CRT (rarely required).
(Continued)
Troubleshooting Symptom Charts/Geometry
(Continued)
- 5
Geometry
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.
(Continued)
Troubleshooting Symptom Charts/Synchronization - 6
Synchronization
Picture breaks into
diagonal lines
Picture rolls
vertically
Picture breaks and
rolls horizontally
1 Connect known-good monitor and verify that built-in video
signal or video card is working properly.
2 Replace main board.
1 Connect known-good monitor and verify that built-in video
signal or video card is working properly.
2 Replace main board.
1 Connect known-good monitor and verify that built-in video
signal or video card is working properly.
2 Replace main board.
Troubleshooting Symptom Charts/Synchronization
(Continued)
- 7
Black raster with
single vertical or
horizontal line
Synchronization
1 Replace main board.
2 Replace CRT.
(Continued)
Troubleshooting Symptom Charts/Video - 8
Video
Raster too dark, too
bright, or washed out
Out of focus 1 Perform focus adjustment. Refer to “Video” in Adjustments
1 Adjust external contrast and brightness controls.
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).
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
Predominant color
tint
Out of convergence
(color bleeding out
from text or lines)
Video
1 Check video card in computer.
2 Perform video adjustments. Refer to “Video” in Adjustments
3 Replace main board.
4 Replace CRT (if you cannot eliminate red, green, or blue
1 Connect known-good monitor and verify that built-in video
2 Perform convergence adjustments. Refer to “Video” in
3 Replace main board.
4 Replace CRT.
(Continued)
chapter.
tint).
signal or video card is working properly.
Adjustments chapter.
Troubleshooting Symptom Charts/Audio - 10
Audio
Sound comes out of
only one speaker
Internal microphone
doesn’t record
No sound or volume is
too low
One of sound output options may be set to Stereo when your
computer is only capable of Mono sound output.
1 To turn on microphone, press microphone button on keypad.
Microphone-on LED lights up when microphone is on.
2 Make sure that monitor is selected as sound input and
playback source.
1 Verify that external sound sources are securely connected to
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
flashes
Intermittently shuts
down
Flashing or wavy
screen
Black screen spots
(burnt phosphor)
1 Move unit away from monitors, fluorescent lights, or other
electrical equipment.
2 Check that all ground cables are secure.
3 Replace main board.
Replace main board.
Replace main board.
Replace CRT.
Troubleshooting Symptom Charts/Miscellaneous
(Continued)
- 12
Miscellaneous
Monitor emits highpitched noise
Does not degauss Replace main board.
Erratic or no
communication with
ADB device
Moving and clicking a
Logitech mouse has no
effect on screen, but
keyboard input is
accepted
Replace main board.
Replace keyboard cable, keyboard, mouse, or other ADB device.
Some models of Logitech mice are incompatible with this display.
Refer customers to Logitech for information on mouse
compatibility and upgrades. The display is not at fault; do not
replace it.
(Continued)
Troubleshooting Symptom Charts/Miscellaneous
(Continued)
- 13
Thin horizontal line
on screen
Miscellaneous
Displays smaller than 15 inches with tron-style CRTs typically
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.
(Continued)
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T ak e 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.
1 With the monitor face-
down on a protective pad,
swivel the monitor
stand to access the two
rear cover screws.
2 Using a T-15 torx
driver, remove the
screws.
Take Apart Rear Cover - 2
Bezel
Rear Cover
Microphone
Locking Tab
Pull-Apart Tool
Locking Tab
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
apart the sides of the
rear cover.
Take Apart Rear Cover - 3
5 Lift off the rear cover.
Rear
Cover
Groove
Guide
Replacement Note:
Line
up the rear cover
grooves with the base
assembly guides and
slide on the rear cover.
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