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16

If the screen is too bright, adjust the backlight.

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This monitor is provided with a sensor to detect the brightness of 
the surrounding area (light sensor). This sensor is used to 
automatically adjust the brightness of the screen.

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When you select ON, the monitor automatically adjusts the screen 
brightness according to the brightness of the surroundings. For 
more information about this function, see “Automatic brightness 
adjustment function (light sensor)” on page 18.

If this function is set to ON, the value of the BACKLIGHT menu does not 
change. If the screen brightness is still not appropriate after the automatic 
adjustment, you can manually adjust the backlight. After the backlight 
adjustment is made, the monitor automatically adjusts the screen 
brightness in accordance with the new backlight value.

This monitor has a function which enables it to enter the power 
save mode automatically according to the power saving settings 
of the computer. You can prevent the monitor from entering the 
power saving mode by setting the following option to OFF.

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The user sensor function enables the monitor to enter the low 
power consumption mode when no one is present in front of the 
monitor.

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If you select ON, the monitor automatically enters the low power 
consumption mode when you move away from the front of the 
monitor. For more information about the low power consumption 
mode, see “Power saving function (user sensor/power saving 
mode)” on page 17.

English, German, French, Spanish, Italian and Japanese versions 
of the on-screen menus are available. The default setting is 
English.

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• ENGLISH
• DEUTSCH: German
• FRANÇAIS: French
• ESPAÑOL: Spanish
• ITALIANO: Italian
•

: Japanese

You can protect adjustment data by locking the menus and 
controls.

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Only the 

1 (power) switch, and 

 (MENU LOCK) of the 

option menu will operate. If any other items are selected, the 

 

mark appears on the screen.

Repeat the procedure above and set and 

 (MENU LOCK) to OFF.

ZZ...

17

This monitor meets the power-saving guidelines set by VESA, 

E

NERGY 

S

TAR, and NUTEK. If the monitor is connected to a computer 

or video graphics board that is DPMS (Display Power Management Signaling) compliant, the monitor will automatically enter the power 
saving mode. It automatically enters the low power consumption mode when the user sensor detects the absence of a user.

When the user sensor in the monitor detects the absence of a user, 
the monitor enters low power consumption mode after about 20 
seconds. In low power consumption mode, the monitor is in a 
power saving state and shuts off power to all circuitry (except for 
that of the sensors) regardless of the setting of the computer.
The monitor returns to normal operation mode when the presence 
of a user is detected by the user sensor.
When the monitor enters the power saving mode (as set according 
to the computer’s settings), the power saving mode takes 
precedence over the low power consumption mode. In this case, 
the monitor stays in the power saving mode regardless of the 
presence or absence of a user.
To return the monitor to normal operation mode, reset the 
computer’s power saving mode.

The user sensor detects the presence/absence of a user up to a distance of 
approximately 60 cm from the screen surface. However, this distance may 
vary depending on the user’s clothes or the brightness of the surrounding 
area. If user detection fails due to the ambient conditions of the 
surrounding area, set the user sensor to OFF. If your monitor does not 
automatically return from low power consumption mode due to the failure 
of the user sensor to detect the presence of a user, press the 

1 (power) 

switch twice to turn the monitor off and then on.

DPMS defines three power saving states according to the state of 
the sync signals supplied from the computer. This monitor’s 
power consumption is input at approximately 3 W in all of these 
states if the power saving function is set to ON.
When your computer enters in the power saving mode, the input 
signal is cut and NO INPUT SIGNAL appears on the screen. 
After a few seconds, the monitor enters power saving mode.

* “Sleep” and “deep sleep” are power saving modes defined by the 

Environmental Protection Agency.

The power saving function may not work normally if sync signals other 
than those listed above are supplied. In such a case, set the power saving 
function to OFF.

1

normal operation

35

 W

green

green

1 low power consumption mode

≤ 4

 W

green

green and orange alternate

2 power saving mode

≤ 3

 W

orange

orange

1 (power): off

≤ 3

 W

red

off

AC power: off

0 W

off

off

suspend (sleep)*

horizontal: on / vertical: off

standby (sleep)*

horizontal: off / vertical: on

active off (deep sleep)*

horizontal: off / vertical: on

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18

This monitor is provided with a feature to automatically adjust the screen brightness according to the brightness of the surroundings. The 
brightness of the backlight is set to the most appropriate level by setting the light sensor to ON. The default setting of the brightness of the 
backlight is set to its maximum. When the light sensor setting is set to ON, the monitor adjusts the brightness of the backlight linearly from 
its lower- to upper-limit values. When the user adjusts the backlight, the backlight brightness is automatically adjusted between the user 
adjustment value and the upper- and lower-limit values.

When the monitor receives an input signal, it automatically 
matches the signal to one of the factory preset modes stored in the 
monitor’s memory to provide a high quality picture at the center 
of the screen. (See Appendix for a list of the factory preset 
modes.)
For input signals that do not match one of the factory preset 
modes, the automatic picture quality adjustment function of this 
monitor automatically adjusts the picture position, phase, and 
pitch, and ensures that a clear picture appears on the screen for 
any timing within the monitor’s frequency range (horizontal: 30 – 
61 kHz, vertical: 50 – 85 Hz). 
Consequently, the first time the monitor receives input signals 
that do not match one of the factory preset modes, the monitor 
may take a longer time than normal for displaying the picture on 
the screen. This adjustment data is automatically stored in 
memory so that next time, the monitor will function in the same 
way as when the monitor receives the signals that match one of 
the factory preset modes.
In all modes as above, if the picture is adjusted, the adjustment 
data is stored as a user mode and automatically recalled whenever 
the same input signal is received.

If the automatic picture quality adjustment function is activated, the 
picture moves slightly whenever the monitor receives the input signal, 
regardless of the stored adjustment.

While the automatic picture quality adjustment function is activated, only 
the 

1 (power) switch, and INPUT button will operate.

User-specified 
brightness value

Backlight brightness

Maximum

User adjustment value

Minimum

Automatic brightness adjustment 
after user adjustment

Preset automatic adjustment

Brightness of surroundings

Brightness during 
user adjustment

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Before contacting technical support, refer to this section.

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 20.

This indicates that the input signal is not supported by the 
monitor’s specifications. Check the following items.

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.

This indicates that the resolution is not supported by the 
monitor’s specifications.

This indicates that no signal is input, or that no signal is input 
from the currently selected connector.

This indicates the currently selected connector (INPUT: 1 or 
INPUT: 2).

The monitor will enter the power saving mode after about 4 
seconds from the message is displayed.

This indicates that the video signal cable has been disconnected 
from the currently selected connector.

This indicates the currently selected connector (INPUT: 1 or 
INPUT: 2). 

The monitor will enter the power saving mode after about 4 
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

I NPUT : 1

GO TO POWER SAVE

I NFORMA T I ON

CAB L E D I SCONNECT ED

I NPUT : 1

GO TO POWER SAVE

I NFORMA T I ON

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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 22) if the following recommendations do not resolve the problem.

If the AC power indicator is not lit

• Check that the power cord is properly connected.

If the AC power indicator is red

• Check that the 

1 (power) switch is in the “on” position.

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

• Check that the 

1 (power) switch is in the “on” position.

• Check that the AC power switch is in the “on” position.
• Check that the system connecting cable is properly connected and all plugs are firmly 

seated in their sockets (page 8).

If the 

1 (power) indicator is green 

or flashing orange

• Use the self-diagnostics function (page 22).

If the 

1 (power) indicator is 

alternating between green and 
orange

• The monitor cannot return from low power consumption mode because the user sensor 

fails to detect the presence of a user. Press the 

1 (power) switch twice to turn the monitor 

off and then on. If you set the user sensor to OFF, the monitor does not enter low power 
consumption mode (page 16).

If CABLE DISCONNECTED 
appears on the screen, or the AC 
power indicator is flashing red

• Check that the video signal cable is properly connected and all plugs are firmly seated in 

their sockets (page 8).

• 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 

signal cable, CABLE DISCONNECTED appears on the screen before entering the power 
saving mode. This is not a malfunction.

• Check that the system connecting cable is properly connected and all plugs are firmly 

seated in their sockets (page 8).

• Press the AC power switch twice to turn the monitor off and then on. 

If NO INPUT SIGNAL appears on 
the screen, or the 

1 (power) 

indicator is orange

• Check that the video signal cable is properly connected and all plugs are firmly seated in 

their sockets (page 8).

• Check that the input select setting is correct (page 10).
• Check that the video input connector’s pins are not bent or pushed in.

x

• The computer is in the 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.

If OUT OF SCAN RANGE appears 
on the screen

x

• 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 – 61 kHz
Vertical frequency: 50 – 85 Hz (only XGA mode at 75 Hz)

If using Windows 95/98

• If you replaced an old monitor with this monitor, reconnect the old monitor and do the 

following. Install the Windows Monitor Information Disk (page 9) and select this monitor 
(“SDM-N50”) from among the Sony monitors in the Windows 95/98 monitor selection 
screen. 

If using a Macintosh system

• Check and refer to the supplied “Notes for Macintosh users.” 

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While the monitor is receiving a video signal, press and hold the 
MENU button for more than 5 seconds to display this monitor’s 
information box.

If any problem persists, call your authorized Sony dealer and give 
the following information:
• Model name: SDM-N50
• Serial number
• Name and specifications of your computer and graphics board.

• Adjust the pitch and phase (page 13).
• 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.

x

• Check your graphics board manual for the proper monitor setting.
• 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 video 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.

• Adjust the brightness and contrast (page 12).
• Adjust the pitch and phase (page 13).

• Eliminate the use of video cable extensions and/or video switch boxes.
• Check that all plugs are firmly seated in their sockets.

• 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.

• Set the zoom setting to ON (page 14).

x

• Set the computer’s resolution to the screen’s resolution.

• Adjust the pitch and phase (page 13).

• Adjust the pitch and phase (page 13).

• Adjust the color temperature (page 14).

• If the menu lock is set to ON, set it to OFF (page 16).

• Set the power saving function to OFF (page 16).
• Set the user sensor to OFF (page 16).

x

• Set the computer’s power saving setting to off.

    INFORMATION

MODEL : SDM-N50
SER  NO : 1234567
MANUFACTURED : 1999-52

MENU

Example

Model name

Serial number

Week and year 
of manufacture

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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.

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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. 

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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.

LCD panel

Panel type: a-Si TFT Active Matrix
Picture size: 15 inch (38 cm)

Input signal format

RGB operating frequency*
Horizontal: 30 – 61 kHz
Vertical: 50 – 85 Hz

Resolution

Horizontal: Max.1024 dots
Vertical: Max.768 lines

Input signal levels

RGB video signal

0.700 Vp-p, 75 

Ω

, positive

SYNC signal

TTL level, 2 k

Ω

, 

positive or negative
(Separate horizontal and vertical, 
or composite sync)
0.3 Vp-p, 75

Ω

, negative

(Sync on green) 

Audio output

2W 

×

 2

Headphones jack

Stereo minijack
Accepts impedance of 16 – 48

Ω

AUDIO IN jack

Stereo minijack
Accepts impedance of 16  k

Ω

Accepts level 0.5 Vrms

Power requirements

100 – 240 V, 50 – 60 Hz, 0.55 – 0.3 A

Power consumption

Max. 35 W

Operating temperature

5 – 35 

˚

C

Dimensions (width/height/depth)

Display (upright): 

Approx. 356 

×

 347 

×

 185 mm

(14 

1

/

8

 

×

 13 

3

/

4 

×

 7 

3

/

8

 inches) 

Media engine (without stand): 

Approx. 45 

×

 180 

×

 180 mm

(1 

13

/

16

 

×

 7 

1

/

8 

×

 7 

1

/

8

 inches) 

Media engine (with stand): 

Approx. 94 

×

 185 

×

 180 mm

(3 

3

/

4

 

×

 7 

3

/

8 

×

 7 

1

/

8

 inches) 

Mass

Display: 

Approx. 2.7 kg (5 lb 15 oz)

Media engine (with stand): 

Approx. 0.85 kg (1 lb 14 oz)

Plug & Play

DDC1/DDC2B/DDC2Bi

Accessories

See page 8.

* 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.

Design and specifications are subject to change without notice.

1

 (power) 

indicator