SDM-M51 (serv.man2) - Sony Monitor Service Manual (repair manual). Page 14

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20
Displaying this monitor’s name, serial number, 
and date of manufacture.
While the monitor is receiving a video signal, press and 
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.
Picture is fuzzy
• Adjust the brightness and contrast (page 12).
• 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.
Picture is not centered or sized 
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 
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.
Wavy or elliptical pattern (moire) 
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
MENU
Example
Model name
Serial number
Week and year 
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.
If the 
1
 (power) indicator is green
1
Turn off the 
(POWER) switch and disconnect the 
video signal cables from the monitor.
2
Turn the monitor on by pressing the 
(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).
If the color bars do not appear, there is a potential monitor failure. 
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.
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.
Specifications
LCD panel
Panel type: a-Si TFT Active Matrix
Picture size: 15.1 inch
Input signal format
RGB operating frequency*
Horizontal: 28 – 64 kHz
Vertical: 48 – 75 Hz
Resolution
Horizontal: Max.1024 dots
Vertical: Max.768 lines
Input signal levels
RGB video signal
0.7 Vp-p, 75 
, positive
SYNC signal
TTL level, 2.2 k
positive or negative
(Separate horizontal and vertical, 
or composite sync)
0.3 Vp-p, 75
, negative 
(Sync on green) 
Audio output
1 W 
×
 2
Headphones jack
Stereo minijack
Accepts impedance of 16 – 48 
AUDIO IN jack
Stereo minijack
Accepts impedance of 47 k
Accepts level 0.5 Vrms
Power requirements
100 – 240 V, 50 – 60 Hz, 
0.4 – 0.2 A
DC input
DC 18 V (supplied AC adapter)
Power consumption
Max. 19 W
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
/
×
 7 
1
/
8
 inches) 
(with stand)
Approx. 387 
×
 296 
×
 48 mm
(15 
1
/
4
 
×
 11 
3
/
×
 1 
15
/
16
 inches) 
(without stand)
Mass
Approx. 4.6 kg (10 lb 14 oz) (with 
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.
Design and specifications are subject to change without notice.
1
 (power) 
indicator
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