HMD-A400 - Sony Audio Service Manual (repair manual). Page 10

1-5

 

12

 

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 digital Multiscan technology of this monitor ensures 
that a clear picture appears on the screen for any timing in the 
monitor’s frequency range (horizontal: 30 – 86 kHz, vertical: 48 – 
120 Hz). If the picture is adjusted, the adjustment data is stored as 
a user mode and automatically recalled whenever the same input 
signal is received.

 

For Windows users, check your video board manual or the utility 
program which comes with your graphic board and select the 
highest available refresh rate to maximize monitor performance.

 

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

 

E

 

NERGY 

 

S

 

TAR, and NUTEK. If no signal is received by the 

monitor from the connected computer, the monitor will 
automatically reduce power consumption as shown below.

 

*

Figures reflect power consumption when no USB compatible 
peripherals are connected to the monitor.

** When your computer enters the “active off” mode, the input signal is 

cut and NO INPUT SIGNAL appears on the screen. After 20 seconds, 
the monitor enters the power saving mode.

 

Before contacting technical support, refer to this section.

 

The visible lines on your screen especially when the background 
screen color is light (usually white), are normal for the Trinitron 
monitor. This is not a malfunction. These are shadows from the 
damper wires used to stabilize the aperture grille. The aperture 
grille is the essential element that makes a Trinitron picture tube 
unique by allowing more light to reach the screen, resulting in a 
brighter, more detailed picture.

 

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 13.

 

indicates that the input signal is not supported by the 
monitor’s specifications.

 

indicates that no signal is being input to the monitor.

 

!

 

normal 
operation

 

≤

 

 150 W

green

active off**

 

≤

 

 3 W

orange

power off

0 W

off

Damper wires

INFORMATION

OUT  OF  SCAN  RANGE

Input signal condition

 

13

 

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

 

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.

If the NO INPUT SIGNAL message 
appears on the screen, or if the 

 

!

 

 

(power) indicator is orange

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

their sockets (page 6).

• Check that the HD15 video input connector’s pins are not bent or pushed in.

 

x

 

• The computer is in power saving mode. Try pressing any key on the computer 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 the OUT OF SCAN RANGE 
message 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 – 86 kHz
Vertical: 48 – 120 Hz

If no message is displayed and the 

 

!

 

 

(power) indicator is green or flashing 
orange

• Use the Self-diagnosis function (page 15).

If using a Macintosh system

• Check that the Macintosh adapter (not supplied) and the video signal cable are properly 

connected (page 6).

 

• 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.
• Try turning the monitor 90

 

°

 

 to the left or right.

 

x

 

• Check your graphics board manual for the proper monitor setting.
• Confirm that the graphics mode (VESA, 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 9).
• Degauss the monitor* (page 11).
• Select CANCEL MOIRE and adjust the moire cancellation effect (page 11).

 

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

 

• Adjust the size (page 10) or centering (page 10). Note that some video modes do not fill 

the screen to the edges.

 

• Adjust the geometry (page 10).

 

• Select CANCEL MOIRE and adjust the moire cancellation effect (page 11).

 

x

 

• Change your desktop pattern.

(continued)