Sony SDM-M51 Service Manual ▷ View online
1-8
18
Troubleshooting
Before contacting technical support, refer to this section.
On-screen messages
If there is something wrong with the input signal, one of the
following messages appears on the screen. To solve the problem,
see “Trouble symptoms and remedies” on page 19.
following messages appears on the screen. To solve the problem,
see “Trouble symptoms and remedies” on page 19.
If OUT OF SCAN RANGE appears on the screen
This indicates that the input signal is not supported by the
monitor’s specifications. Check the following items.
monitor’s specifications. Check the following items.
If “xx.x kHz/xx Hz” is displayed
This indicates that either the horizontal or vertical frequency
is not supported by the monitor’s specifications.
The figures indicate the horizontal and vertical frequencies of
the current input signal. The horizontal frequencies above
100 kHz and the vertical frequencies above 100 Hz are
represented by 99.9 kHz and 99 Hz, respectively.
is not supported by the monitor’s specifications.
The figures indicate the horizontal and vertical frequencies of
the current input signal. The horizontal frequencies above
100 kHz and the vertical frequencies above 100 Hz are
represented by 99.9 kHz and 99 Hz, respectively.
If “RESOLUTION > XGA” is displayed
This indicates that the resolution is not supported by the
monitor’s specifications.
monitor’s specifications.
If NO INPUT SIGNAL appears on the screen
This indicates that no signal is input.
GO TO POWER SAVE
The monitor will enter the power saving mode after about 5
seconds from the message is displayed.
seconds from the message is displayed.
If CABLE DISCONNECTED appears on the screen
This indicates that the video signal cable has been disconnected
from the currently selected connector.
from the currently selected connector.
GO TO POWER SAVE
The monitor will enter the power saving mode after about 5
seconds from the message is displayed.
seconds from the message is displayed.
OUT OF SCAN RANGE
x x . x k H z /
x x H z
I NFORMA T I ON
NO
I NPUT S I GNA L
GO TO POWER SAVE
I NFORMA T I ON
CAB L E D I SCONNECT ED
GO TO POWER SAVE
I NFORMA T I ON
19
GB
Trouble symptoms and remedies
If a 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 21) if the following recommendations do not resolve the problem.
Use the self-diagnosis function (page 21) if the following recommendations do not resolve the problem.
Symptom
Check these items
No picture
If the 1 (power) indicator is not lit,
or if the 1 (power) indicator will not
light up when the 1 (power) switch
is pressed
or if the 1 (power) indicator will not
light up when the 1 (power) switch
is pressed
• Check that the power cord is properly connected.
• Check that the 1 (power) switch is in the “on” position.
• Check that the 1 (power) switch is in the “on” position.
If the 1 (power) indicator is green
or flashing orange
or flashing orange
• Use the self-diagnostics function (page 21).
If CABLE DISCONNECTED
appears on the screen
appears on the screen
• Check that the video signal cable is properly connected and all plugs are firmly seated in
their sockets (page 7).
• Check that the video input connector’s pins are not bent or pushed in.
• A non-supplied video signal cable is connected. If you connect a non-supplied video
• A non-supplied video signal cable is connected. If you connect a non-supplied video
signal cable, CABLE DISCONNECTED may appear on the screen before entering the
power saving mode. This is not a malfunction.
power saving mode. This is not a malfunction.
If NO INPUT SIGNAL appears on
the screen, or the 1 (power)
indicator is either orange or
alternating between green and
orange
the screen, or the 1 (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 7).
• 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 the power saving mode. Try pressing any key on the keyboard or
moving the mouse.
• Check that your graphic board is attached to the computer properly.
• Check that the computer’s power is “on.”
• Check that the computer’s power is “on.”
If OUT OF SCAN RANGE appears
on the screen
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: 28 – 64 kHz, Vertical frequency: 48 – 75 Hz
frequency range to the following:
Horizontal: 28 – 64 kHz, Vertical frequency: 48 – 75 Hz
If using Windows 95/98/2000
• If you replaced an old monitor with this monitor, reconnect the old monitor and do the
following. Select “SONY” from the “Manufactures” list and select “SDM-M51” from the
“Models” list in the Windows 95/98/2000 device selection screen. If “SDM-M51” does
not appear in the “Models” list, try “Plug & Play” or install the newest information of the
Sony Computer Display from the Windows Monitor Information Disk (page 9).
“Models” list in the Windows 95/98/2000 device selection screen. If “SDM-M51” does
not appear in the “Models” list, try “Plug & Play” or install the newest information of the
Sony Computer Display from the Windows Monitor Information Disk (page 9).
If using a Macintosh system
• When connecting to a Power Mac G3/G4 that has 3 rows of pins, check that the supplied
Macintosh adapter and the video signal cable are properly connected (page 7).
• 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
• Adjust the pitch and phase (page 13).
• Isolate and eliminate any potential sources of electric or magnetic fields such as other
• Isolate and eliminate any potential sources of electric or magnetic fields such as other
monitors, laser printers, electric fans, fluorescent lighting, or televisions.
• 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.
• Change the orientation of the display.
• Try plugging the monitor into a different AC outlet, preferably on a different circuit.
• Change the orientation of the display.
x
Problems caused by the connected computer or other equipment
• Check your graphics board manual for the proper monitor setting.
• Confirm that the graphics mode (VESA, Macintosh 19" Color, etc.) and the frequency of
• Confirm that the graphics mode (VESA, Macintosh 19" 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.
(continued)
20
Displaying this monitor’s name, serial number,
and date of manufacture.
and date of manufacture.
While the monitor is receiving a video signal, press and
hold the MENU button for more than 5 seconds.
hold the MENU button for more than 5 seconds.
The monitor’s information box appears.
If any problem persists, call your authorized Sony dealer and give
the following information:
• Model name: SDM-M51
• Serial number
• Name and specifications of your computer and graphics board.
the following information:
• Model name: SDM-M51
• Serial number
• Name and specifications of your computer and graphics board.
Picture is fuzzy
• Adjust the brightness and contrast (page 12).
• Adjust the pitch and phase (page 13).
• Adjust the pitch and phase (page 13).
x
Problems caused by the connected computer or other equipment
• Set the resolution to XGA (1024 x 768) on your computer.
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
• Adjust the pitch and phase (page 13).
• Adjust the picture position (page 13). Note that some video modes do not fill the screen to
• Adjust the picture position (page 13). Note that some video modes do not fill the screen to
the edges.
The picture is dark
• Adjust the brightness (page 12).
• Adjust the backlight (page 12).
• It takes a few minutes for the display to become bright after turning on the monitor.
• Adjust the backlight (page 12).
• It takes a few minutes for the display to become bright after turning on the monitor.
Wavy or elliptical pattern (moire)
is visible
is visible
• Adjust the pitch and phase (page 13).
Color is not uniform
• Adjust the pitch and phase (page 13).
White does not look white
• Adjust the color temperature (page 14).
Monitor buttons do not operate
(
(
appears on the screen)
• If the menu lock is set to ON, set it to OFF (page 16).
The monitor turns off after a while
• Set the power saving function to OFF (page 15).
x
Problems caused by the connected computer or other equipment
• Set the computer’s power saving setting to off.
Symptom
Check these items
INFORMATION
MODEL : SDM-M51
SER NO : 1234567
MANUFACTURED : 2000-52
SER NO : 1234567
MANUFACTURED : 2000-52
MENU
Example
Model name
Serial number
Week and year
of manufacture
of manufacture
21
GB
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 1 (power) indicator will either light up green or
flash orange. If the 1 (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 1 (power) indicator will either light up green or
flash orange. If the 1 (power) indicator is lit in orange, the
computer is in power saving mode. Try pressing any key on the
keyboard or moving the mouse.
If the
1
(power) indicator is green
1
Turn off the
1
(POWER) switch and disconnect the
video signal cables from the monitor.
2
Turn the monitor on by pressing the
1
(POWER)
switch.
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.
If the
1
(power) indicator is flashing orange
Press the
1
(power) switch twice to turn the monitor off
and then on.
If the 1 (power) indicator lights up green, the monitor is working
properly.
properly.
If the 1 (power) indicator is still flashing, there is a potential
monitor failure. Count the number of seconds between orange
flashes of the 1 (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 1 (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
LCD panel
Panel type: a-Si TFT Active Matrix
Picture size: 15.1 inch
Picture size: 15.1 inch
Input signal format
RGB operating frequency*
Horizontal: 28 – 64 kHz
Vertical: 48 – 75 Hz
Horizontal: 28 – 64 kHz
Vertical: 48 – 75 Hz
Resolution
Horizontal: Max.1024 dots
Vertical: Max.768 lines
Vertical: Max.768 lines
Input signal levels
RGB video signal
0.7 Vp-p, 75
Ω
, positive
SYNC signal
TTL level, 2.2 k
Ω
,
positive or negative
(Separate horizontal and vertical,
or composite sync)
0.3 Vp-p, 75
(Separate horizontal and vertical,
or composite sync)
0.3 Vp-p, 75
Ω
, negative
(Sync on green)
Audio output
1 W
×
2
Headphones jack
Stereo minijack
Accepts impedance of 16 – 48
Accepts impedance of 16 – 48
Ω
AUDIO IN jack
Stereo minijack
Accepts impedance of 47 k
Accepts impedance of 47 k
Ω
Accepts level 0.5 Vrms
Power requirements
100 – 240 V, 50 – 60 Hz,
0.4 – 0.2 A
0.4 – 0.2 A
DC input
DC 18 V (supplied AC adapter)
Power consumption
Max. 19 W
Max. 22 W (including AC adapter)
Max. 22 W (including AC adapter)
Operating temperature
5 – 35
˚
C
Dimensions (width/height/depth)
Display (upright):
Approx. 387
×
345
×
180 mm
(15
1
/
4
×
13
5
/
8
×
7
1
/
8
inches)
(with stand)
Approx. 387
Approx. 387
×
296
×
48 mm
(15
1
/
4
×
11
3
/
4
×
1
15
/
16
inches)
(without stand)
Mass
Approx. 4.6 kg (10 lb 14 oz) (with
stand)
stand)
Plug & Play
DDC1/DDC2B/DDC2Bi
Accessories
See page 7.
* 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 2.5 µsec.
• Vertical blanking width should be more than 450 µsec.
• Vertical blanking width should be more than 450 µsec.
Design and specifications are subject to change without notice.
1
(power)
indicator
1-9
SDM-M51
SECTION 2
DISASSEMBLY
2-1. BEZLE ASSY AND BACK CABINET REMOVAL
2-1
1
Two screws
(+PTP 3 x 14)
2
Back cabinet
3
TFT panel
4
Bezel a'ssy
Claw
Cushion
SDM-M51
2-3. JI BOARD REMOVAL
2-2
2-2. TFT PANEL AND H BOARD REMOVAL
1
Tree screws
(+PM 3 x 4)
3
Tree screws
(+PM 3 x 4)
4
Insulstor
CN3
CN2
CN1
5
DC-AC inverter
2
Shield cover(B)
1
Four screws
(+PVM 3 x 8)
2
TFT panel
3
H board
to CN3
to CN2
CN801
Click on the first or last page to see other SDM-M51 service manuals if exist.