Sony GDM-FW900 Service Manual ▷ View online
1-8
18
Trouble symptoms and remedies
If the problem is caused by the connected computer or other equipment, please refer to the connected equipment’s instruction manual.
Use the self-diagnosis function (page 20) if the following recommendations do not resolve the problem.
Use the self-diagnosis function (page 20) if the following recommendations do not resolve the problem.
Symptom
Check these items
No picture
If the ! (power) indicator is not lit
• Check that the power cord is properly connected.
• Check that the ! (power) switch is in the “on” position.
• Check that the ! (power) switch is in the “on” position.
If the NO INPUT SIGNAL message
appears on the screen, or if the
! (power) indicator is either orange
or alternating between green and
orange
appears on the screen, or if the
! (power) indicator is either orange
or alternating between green and
orange
• Check that the video signal cable is properly connected and all plugs are firmly seated in
their sockets (page 6).
• Check that the INPUT switch setting is correct (page 9).
• Check that the video input connector’s pins are not bent or pushed in.
• Check that the video input connector’s pins are not bent or pushed in.
x
Problems caused by the connected computer or other equipment
• The computer is in power saving mode. Try pressing any key on the keyboard or moving
the mouse.
• Check that the computer’s power is “on.”
• Check that the graphic board is completely seated in the proper bus slot.
• Check that the graphic board is completely seated in the proper bus slot.
If the OUT OF SCAN RANGE
message appears on the screen
message appears on the screen
x
Problems caused by the connected computer or other equipment
• Check that the video frequency range is within that specified for the monitor. If you
replaced an old monitor with this monitor, reconnect the old monitor and adjust the
frequency range to the following.
Horizontal: 30 – 121 kHz
Vertical: 48 – 160 Hz
frequency range to the following.
Horizontal: 30 – 121 kHz
Vertical: 48 – 160 Hz
If no message is displayed and the
! (power) indicator is green or
flashing orange
! (power) indicator is green or
flashing orange
• Use the Self-diagnosis function (page 20).
If using Windows 95/98
• If your PC/graphic board has difficulty communicating with this monitor, download the
specific driver by accessing the web site of Microsoft Corporation.
If using a Macintosh system
• When connecting to a Power Mac G3/G4 that has 3 rows of pins, check that the supplied
exclusive Power Mac G3/G4 adapter and the video signal cable are properly connected
(page 6).
(page 6).
• If you connect to the other version of Macintosh series computer that has 2 rows of pins,
you will need a different adapter (not supplied).
Picture flickers, bounces,
oscillates, or is scrambled
oscillates, or is scrambled
• Isolate and eliminate any potential sources of electric or magnetic fields such as other
monitors, laser printers, fluorescent lighting, televisions, or electric fans.
• Move the monitor away from power lines or place a magnetic shield near the monitor.
• Try plugging the monitor into a different AC outlet, preferably on a different circuit.
• Try turning the monitor 90
• Try plugging the monitor into a different AC outlet, preferably on a different circuit.
• Try turning the monitor 90
°
to the left or right.
x
Problems caused by the connected computer or other equipment
• Check your graphic board manual for the proper monitor setting.
• Confirm that the graphics mode (VESA, Macintosh 21" Color, etc.) and the frequency of
• Confirm that the graphics mode (VESA, Macintosh 21" Color, etc.) and the frequency of
the input signal are supported by this monitor (Appendix). Even if the frequency is within
the proper range, some graphic boards may have a sync pulse that is too narrow for the
monitor to sync correctly.
the proper range, some graphic boards may have a sync pulse that is too narrow for the
monitor to sync correctly.
• Adjust the computer’s refresh rate (vertical frequency) to obtain the best possible picture.
Picture is fuzzy
• Adjust the brightness and contrast (page 11).
• Degauss the monitor* (page 15).
• If CANCEL MOIRE is ON, the picture may become fuzzy. Decrease the moire
• Degauss the monitor* (page 15).
• If CANCEL MOIRE is ON, the picture may become fuzzy. Decrease the moire
cancellation effect or set CANCEL MOIRE to OFF (page 14).
19
GB
* If a second degauss cycle is needed, allow a minimum interval of 20 minutes for the best result. A humming noise may be heard, but this is not a
malfunction.
Picture is ghosting
• Eliminate the use of video cable extensions and/or video switch boxes.
• Check that all plugs are firmly seated in their sockets.
• Check that all plugs are firmly seated in their sockets.
Picture is not centered or sized
properly
properly
• Press the ASC button (page 9).
• Adjust the size or centering (page 12). Note that some video modes do not fill the screen
• Adjust the size or centering (page 12). Note that some video modes do not fill the screen
to the edges.
Edges of the image are curved
• Adjust the geometry (page 12).
Wavy or elliptical pattern (moire)
is visible
is visible
• Set CANCEL MOIRE to ON and adjust the degree of moire cancellation until the moire is
at a minimum (page 14).
x
Problems caused by the connected computer or other equipment
• Change your desktop pattern.
Color is not uniform
• Degauss the monitor* (page 15). If you place equipment that generates a magnetic field,
such as a speaker, near the monitor, or if you change the direction the monitor faces, color
may lose uniformity.
may lose uniformity.
• Adjust the landing (page 14).
White does not look white
• Adjust the color temperature (page 12).
• Check that the five BNC connectors are connected in the correct order (page 6).
• Check that the five BNC connectors are connected in the correct order (page 6).
Letters and lines show red or blue
shadows at the edges
shadows at the edges
• Adjust the convergence (page 15).
Monitor buttons do not operate
(
(
appears on the screen)
• If the control lock is set to ON, set it to OFF (page 15).
IMAGE RESTORATION function
does not operate
does not operate
• Before using this function, the monitor must be in normal operation mode (green power
indicator on) for at least 30 minutes. For more information on using the IMAGE
RESTORATION function, see page 14.
RESTORATION function, see page 14.
• Adjust the computer’s power saving settings to keep the monitor in normal operation
mode for more than 30 minutes.
• The monitor may gradually lose its ability to perform this function due to the natural aging
of the picture tube.
USB peripherals do not function
• Check that the appropriate USB connectors are securely connected (page 8).
• Check that the ! (power) switch is in the “on” position.
• Check that the ! (power) switch is in the “on” position.
x
Problems caused by the connected computer or other equipment
• Check that the power of any self-powered USB compliant peripheral devices is “on.”
• Install the latest version of the device driver on your computer. Contact your device’s
• Install the latest version of the device driver on your computer. Contact your device’s
manufacturer for information about the appropriate device driver.
• If your USB compliant keyboard or mouse does not function, connect them directly to
your computer, reboot your computer, and make any necessary adjustments to the USB
settings. Then reconnect the keyboard or mouse to the monitor. If you connect a keyboard
or mouse to the USB connectors and then boot your computer for the first time, the
peripheral devices may not function.
settings. Then reconnect the keyboard or mouse to the monitor. If you connect a keyboard
or mouse to the USB connectors and then boot your computer for the first time, the
peripheral devices may not function.
• For customers using Windows 95
1. Right-click on My Computer and select Properties.
2. Click on the Device Manager tab. Scroll down and select Universal Serial Bus
2. Click on the Device Manager tab. Scroll down and select Universal Serial Bus
Controller.
If Universal Serial Bus Controller does not appear, you need to load a USB supplement
disk. Contact your computer’s manufacturer for more information about obtaining a
USB supplement disk.
If Universal Serial Bus Controller does not appear, you need to load a USB supplement
disk. Contact your computer’s manufacturer for more information about obtaining a
USB supplement disk.
3. Select Generic USB Device from the USB controller list and click on Properties.
4. If there is a check in the box next to “Disable in this hardware profile,” remove the
4. If there is a check in the box next to “Disable in this hardware profile,” remove the
check.
5. Click on Refresh.
A hum is heard right after the
power is turned on
power is turned on
• This is the sound of the auto-degauss cycle. When the power is turned on, the monitor is
automatically degaussed for 3 seconds.
Symptom
Check these items
EASY
EXPERT
s
B
G
R
5 0 0 0 K
6 5 0 0 K
9 3 0 K
0
5 0
K
0
0
I MAGE
RES TORA T I ON
AVA I L AB L E
A F T ER WARM UP
A F T ER WARM UP
COLOR
1-9
20
Self-diagnosis function
This monitor is equipped with a self-diagnosis function. If there is
a problem with your monitor or computer(s), the screen will go
blank and the ! (power) indicator will either light up green or
flash orange. If the ! (power) indicator is lit in orange, the
computer is in power saving mode. Try pressing any key on the
keyboard or moving the mouse.
a problem with your monitor or computer(s), the screen will go
blank and the ! (power) indicator will either light up green or
flash orange. If the ! (power) indicator is lit in orange, the
computer is in power saving mode. Try pressing any key on the
keyboard or moving the mouse.
x
If the
!
(power) indicator is green
1
Disconnect any plugs from the video input 1 and 2
connectors, or turn off the connected computer(s).
connectors, or turn off the connected computer(s).
2
Press the
!
(power) button twice to turn the monitor
off and then on.
3
Move the joystick to the right for 2 seconds before
the monitor enters power saving mode.
the monitor enters power saving mode.
If all four color bars appear (white, red, green, blue), the monitor
is working properly. Reconnect the video input cables and check
the condition of your computer(s).
is working properly. Reconnect the video input cables and check
the condition of your computer(s).
If the color bars do not appear, there is a potential monitor failure.
Inform your authorized Sony dealer of the monitor’s condition.
Inform your authorized Sony dealer of the monitor’s condition.
x
If the
!
(power) indicator is flashing orange
Press the
!
(power) button twice to turn the monitor off
and then on.
If the ! (power) indicator lights up green, the monitor is working
properly.
properly.
If the ! (power) indicator is still flashing, there is a potential
monitor failure. Count the number of seconds between orange
flashes of the ! (power) indicator and inform your authorized
Sony dealer of the monitor’s condition. Be sure to note the model
name and serial number of your monitor. Also note the make and
model of your computer and graphic board.
monitor failure. Count the number of seconds between orange
flashes of the ! (power) indicator and inform your authorized
Sony dealer of the monitor’s condition. Be sure to note the model
name and serial number of your monitor. Also note the make and
model of your computer and graphic board.
Specifications
CRT
0.23 – 0.27 mm aperture grille pitch
24 inches measured diagonally
90-degree deflection
FD Trinitron
24 inches measured diagonally
90-degree deflection
FD Trinitron
Viewable image size
Approx. 482.1
×
308.2 mm (w/h)
(19
×
12
1
/
4
inches)
19.8" viewing image
Resolution
Maximum (16:10)
Horizontal: 2304 dots
Vertical: 1440 lines
Vertical: 1440 lines
Maximum (4:3)
Horizontal: 2048 dots
Vertical: 1536 lines
Vertical: 1536 lines
Recommended (16:10)
Horizontal: 1920 dots
Vertical: 1200 lines
Vertical: 1200 lines
Input signal levels
Video signal
Analog RGB: 0.700 Vp-p
(positive), 75
(positive), 75
Ω
SYNC signal
H/V separate or composite sync:
TTL 2 k
TTL 2 k
Ω
, Polarity free
Sync on Green: 0.3 Vp-p
(negative)
(negative)
Standard image area
16:10
Approx. 474
×
296 mm (w/h)
(18
3
/
4
×
11
3
/
4
inches)
4:3
Approx. 395
×
296 mm (w/h)
(15
5
/
8
×
11
3
/
4
inches)
5:4
Approx. 370
×
296 mm (w/h)
(14
5
/
8
×
11
3
/
4
inches)
Deflection frequency*
Horizontal: 30 to 121 kHz
Vertical: 48 to 160 Hz
Vertical: 48 to 160 Hz
AC input voltage/current 100 to 240 V, 50/60 Hz, 2.2 – 1.2 A
Power consumption
Power consumption
Approx. 170 W (with no USB devices
connected)
connected)
Operating temperature
10˚C to 40˚C
Dimensions
Approx. 571.5
×
500
×
522.5 mm (w/h/
d) (22
1
/
2
×
19
3
/
4
×
20
5
/
8
inches)
Mass
Approx. 42 kg (92 lb 10 oz)
Plug and Play
DDC1/DDC2B/DDC2Bi, GTF**
Supplied accessories
See page 6
* Recommended horizontal and vertical timing condition
• Horizontal sync width duty should be more than 4.8% of
total horizontal time or 0.8 µs, whichever is larger.
• Horizontal blanking width should be more than 2.3 µsec.
• Vertical blanking width should be more than 450 µsec.
• Vertical blanking width should be more than 450 µsec.
** If the input signal is Generalized Timing Formula (GTF)
compliant, the GTF feature of the monitor will automatically
provide an optimal image for the screen.
provide an optimal image for the screen.
Design and specifications are subject to change without notice.
MENU
INPUT
ASC
RESET
2
1
!
(power) indicator
GDM-FW900
2-1. CABINET ASSY REMOVAL
SECTION 2
DISASSEMBLY
2-2. D BOARD REMOVAL
2-1
1
Screw cover(L)
0
Video shield assembly
8
Top cover
6
Cabinet assembly
4
Two claws
5
Two claws
5
Two claws
2
Screw cover(R)
3
Four screws
(+ BVTP 4 x 16)
7
Four screws
(+ BVTT 4 x 8)
9
Three screws
(+ BVTT 4 x 8)
Claw
Bezel
Knock lightly cabinet
assembly in the
direction of arrow
assembly in the
direction of arrow
A
.
A
4
Two screws
(+ BVTP 3 x 12)
6
D board
Tow hooks
GND
CN504
1
Three screws
(+ BVTT 4 x 8)
5
Printed circuit board holder
3
Screw
(+ P 3.5 x 20)
2
Open the D block in the direction
of the arrow
A
. and remove of
the arrow
B
.
CN505
A
B
GDM-FW900
2-3. G BOARD REMOVAL
2-4. A BOARD AND I/O TERMINAL BOARD ASSY REMOVAL
2-2
Two hooks
3
Two screws
(+BVTP 3 x 8)
4
G shield
7
G board
8
Two screws
(+ KTP 3 x 8)
1
Three screws
(+ BVTT 4 x 8)
5
Screw
(+BVTP 3 x 8)
9
AC inlet (3P)
CN654
CN653
CN652
CN655
CN601
CN603
CN650
CN651
GND
GND
CN602
GND
2
Open the G block in the direction
of the arrow
A
. and remove of
the arrow
B
.
6
Two printed circuit board holders
B
A
4
A board (2/2)
2
Screw(M4)
(EXT TOOTH Washer)
1
Three screws
(+BVTT 4 x 8)
5
Two screws
(HD15)
6
Terminal board assembly
3
A board (1/2)
A board (1/2)
When installing terminal
bracket,be sure to apply
screw lock on 2 spots after
screws (HD15) are fixed.
bracket,be sure to apply
screw lock on 2 spots after
screws (HD15) are fixed.
A board (1/2)
Screw lock
Click on the first or last page to see other GDM-FW900 service manuals if exist.