Page 1
SONY.
Multiscan® Color Graphic Display
Operating Instructions
Mode d’emploi
3-755-952«21 (1)
© 1992 by Sony Corporation
Page 2
Owner’s Record
The model and serial numbers are located at the rear ot the
unit. Record the serial number in the space provided below.
Refer to these numbers whenever you call upon your
dealer regarding this product.
Model No. GDM-2038 Serial No.
_________________________
Bescheinigung des Herstellers
Hiermit wird bescheinigt, daß der Monitor GDM-2038 in
Übereinstimmung mit den Bestimmungen der
Amtsblattverfügung Nr.1046/1984 funkentstört ist.
Der Deutschen Bundespost wurde das Inverkehr
bringen dieses Gerätes angezeigt und die Berechtigung
zur Überprüfung der Serie auf Einhaltung der
Bestimmungen eingeräumt.
Sony Corporation
WARNING
NOTE: This equipment has been tested and found to
comply with the limits for a Class A digital device, pursuant
to Part 15 of the FCC Rules. These limits are designed to
provide reasonable protection against harmful interference
when the equipment is operated in a commercial
environment. This equipment generates, uses, and can
radiate radio frequency energy and, if not installed and
used in accordance with the instruction manual, may cause
harmful interference to radio communications. Operation of
this equipment in a residential area is likely to cause
harmful interference in which case the user will be required
to correct the interference at his own expense.
“You are cautioned that any changes or modifications not
expressly approved in this manual could void your authority
to operate this equipment.”
For the customers in Canada
This apparatus complies with the Class A limits for radio
noise emissions set out in Radio Interference
Regulations.
Pour les utilisateurs au Canada
Cet appareil est conforme aux normes Classe A pour
bruits radioélectriques, spécifiés dans le Règlement sur
le brouillage radioélectrique.
INFORMATION
This product complies with Swedish National Council for
Metrology (MPR) standards issued in December 1990
(MPR II) for very low frequency (VLF) and extremely low
frequency (ELF).
INFORMATION
Ce produit est conforme aux normes du Swedish National
Council for Metrology de décembre 1990 (MPR II) en ce qui
concerne les fréquences très basses (VLF) et extrêmement
basses (ELF).
Hinweis
Dieses Gerät erfüllt bezüglich tieffrequenter (very low
frequejncy) und tiefstfrequenter (extremely low frequency)
Strahlung die Vorschriften des „Swedish National Council
for Metrology (MPR)“ vom Dezember 1990 (MPR II).
INFORMACIÓN
Este producto cumple las normas del Consejo Nacional
Sueco para Metrología (MPR) emitidas en diciembre de
1990 (MPR II) para frecuencias muy bajas (VLF) y
frecuencias extremadamente bajas (ELF).
Hinweis
Gemäß dem Amtsblatt des Bundesministers für das
Post- und Fernmeldewesen Nr. 163/1984 wird der
Beireiber darauf aufmerksam gemacht, daß die von ihm
mit disesm Gerät zusammengestellte Anlage auch den
technischen Bestimmungen dieses Amtsblattes genügen
muß.
Hinweise
• Aus ergonomischen Gründen wird empfohlen, die
Grundfarbe Blau nicht auf dunklem Untergrund zu
verwenden (schlechte Erkennbarkeit, Augenbelastung
bei zu geringem Zeichenkontrast).
• Aus ergonomischen Gründen sollten nur
Darstellungen auf dunklem Hintergrund bei
Vertikalfrequenzen ab 60 Hz (ohne Zeilensprung)
benutzt werden.
• Die Konvergenz des Bildes kann sich auf Grund des
Magnetfeldes am Ort der Aufstellung aus der
korrekten Grundeinstellung verändern. Zur Korrektur
empfiehlt es sich deshalb, die Regler an der
Frontseite für H. STAT und V. STAT so einzustellen,
daß die getrennt sichtbaren Farblinien für Rot, Grün
und Blau bei z. B. der Darstellung eines Buchstabens
zur Deckung (konvergenz) gelangen.
Siehe hierzu auch die Erklärungen zu H. STAT und V.
STAT.
NOTICE
This notice is applicable for USA/Canada only.
If shipped to USA/Canada, install only a UL LISTED/CSA
LABELLED power supply cord meeting the following
specifications:
SPECIFICATIONS
Plug Type Nema-Plug 5-15p
Cord Type SVT or SJT, minimum 3x18
AWG
Length Maximum 15 feet
Rating Minimum 7A, 125V
NOTICE
Celle notice s’applique aux Etats-Unis et au Canada
uniquement.
Si cet appareil est exporté aux Etats-Unis ou au Canada,
utiliser le cordon d’alimentation portant la mention UL
LISTED/CSA LABELLED et remplissant les conditions
suivantes:
SPECIFICATIONS
Type de fiche Fiche Nema 5-15 broches
Cordon Type SVT ou SJT, minimum 3 X 18
AWG
Longueur Maximum 15 pieds
Tension Minimum 7A, 125V
Page 3
Multiscan® Color Graphic Display
GDM-2038
Operating Instructions
Before operating the unit, please read this manual thoroughly and retain it for
future reference.
□
Page 4
Table of Contents
Overview
Overview..........................................................................................................................4
Precautions.....................................................................................................................5
Function of controls.......................................................................................................6
Connection......................................................................................................................9
Preset mode..................................................................................................................10
Adjustment...................................................................................................................11
Specifications...............................................................................................................17
Appendix.......................................................................................................................19
Sony display memory system................................................................................19
Sony trinitron system..............................................................................................20
The Sony GDM-2038 is a multiscan-type Trinitron™ color graphic display, that
displays the video signals input from the connected computer with the optimum
picture quality. It can input a wide range of video signals (28 to 85 kHz of horizontal
scan and 50 to 160 Hz of vertical scan), and can be used with a variety of computers
and work stations. Its new “Sony Display Memory System (SDMS)” automatically
distinguishes the type of input signals and provides an optimum display without any
manual adjustment. It has factory-preset display values for 9 different types of signals
(preset-type models) within the SDMS memory. The values for up to 15 types of
signals can additionally be preset to the memory.
The Sony GDM-2038 is a result of Sony’s 20-year commitment to the proprietary
Emmy Award winning Trinitron and our engineering expertise.
Page 5
Precautions
Ifislallitlon
Warning on Power Connection
Maintenance
Prevent internal heat build-up by allowing adequate air circulation. Do not place the
unit on surfaces (rugs, blankets, etc.) nor near materials (curtains, draperies) that
may block the ventilation holes.
Do not install the unit near heat sources such as radiators or air ducts, nor in a
place subject to direct sunlight, excessive dust, mechanical vibration or shock.
Do not place the unit near equipment which generates magnetism, such as a
converter or high voltage power lines.
The supplied power cord may be connected only to 100 to 120 V AC, 50/60 Hz
power sources. Do not use it for 220 to 240 V AC, 50/60 Hz power sources.
To disconnect the power cord, wait for at least 30 seconds after turning off the
power for discharging the static electricity on the CRT display surface.
After the power has been turned on, the CRT is demagnetized for approximately 5
seconds. This generates a strong magnetic field around the bezel which may affect
the data stored on magnetic tape or disks near the bezel. Place such magnetic
recording equipment and tapes/disks apart from this unit.
Clean the cabinet, panel and controls with a soft cloth lightly moistened with a mild
detergent solution. Do not use any type of abrasive pad, scouring powder or
solvent, such as alcohol or benzine.
The surface of the CRT display is AR-coated. Never use a strong solvent, such as
benzine, to clean the surface, otherwise the AR-coating will come off.
Page 6
Function of Controls
Refer to the pages in • for details.
Page 7
[3 COLOR SELECT switch 0
Switches the color temperature to L (Low), M (Middle),
or H (High).
Each color temperature is preset as follows:
L: approximately 5000°K
M: approximately 6500°K
H: approximately 9300°K
[2] Color adjustment button 0
Press to adjust the color temperature. The color
adjustment indicator [3] lights, showing the color
temperature is adjustable.
[3] Color adjustment indicator 0
The indicator lights when the color adjustment button [2]
is pressed. While the indicator is lit, select the color
element out of R (Red), G (Green), and B (Blue) by
using the SELECT <3/0 buttons
Adjust the selected element by using the ADJUST +/buttons (red) [31Press the color adjustment button [2] again to turn the
indicator off.
[4] Indicators 0
One of the indicators that corresponds to the adjustment
item selected by the SELECT <3/0 buttons [|] lights.
While the indicator is lit, adjust the item by using the
ADJUST +!- buttons (blue) [U or (red) [t]-
VIDEO OUT (video output) connectors (BNC)
Use these connectors to distribute the video signal fed to
this unit to another monitor.
When cables are connected to these connectors, the
75-ohms termination of the VIDEO IN connectors [3] is
released automatically.
VIDEO IN (video input) connectors (BNC)
Accept RGB video signals (0.714 Vp-p, positive).
When no external sync signal is applied, an internal sync
signal (0.286 Vp-p, negative) must be added to the G
(green) signal.
The optimum display may not be obtained when using
computer or video board of high output level
(approx. 1.0 Vp-p). In such a case, adjust the display by
lowering the contrast, or use computer or video board of
adequate output level.
[13] SYNC OUT (sync output) connectors (BNC)
Use these connectors to distribute the external sync
signal fed to this unit to another monitror.
When cables are connected to these connectors, the
termination of the SYNC IN connectors [iil is released
automatically.
[I] SELECT <3/0 buttons 0 0
Press to select the adjustment item so that the indicator
corresponding to the selected item lights.
[6] ADJUST +!- buttons (blue) 0
Adjust the item shown below the indicator selected by
using the SELECT buttons <3/0 [5].
[7] ADJUST -f/- buttons (red) 0 0
Adjust the item shown above the indicator selected by
using the SELECT buttons <3/0 [U.
[H Power switch and lamp
Press the I side of the switch to turn on the power.
Press the O side to turn it off.
Swivel/Tilt stand
The stand allows the angle of the screen to be adjusted
by 90 degrees horizontally and by 15 degrees vertically.
AC IN connector
Use a coaxial cable that is less than 3 meters long and of
75 ohms impedance to connect the VIDEO OUT and
SYNC OUT connectors. If the cable is too long, or if its
impedance is incorrect, or if several monitors are
connected in cascade, the picture may be noisy with
horizontal and vertical lines.
When not distributing signals to another monitor,
disconnect the cables from the VIDEO OUT and SYNC
OUT connectors.
If the BNC connector of the signal distributing cable is not
adequate, the termination impedance may not be
disconnected properly. Always use the cable with
adequate BNC connectors.
7
Page 8
Function of Controls
SYNC IN (sync input) connectors (BNC)
Accept external sync signals (2 to 5 Vp-p, positive or
negative).
HD : for horizontal drive pulse or composite drive pulse
VD : for vertical drive pulse
When an external sync signal is applied, the monitor is
switched automatically from fhe internal sync mode to
the external sync mode. When the G signal contains the
sync signal, however, the hue of the monitor may be
changed. In this case, disconnect the external sync
signal and apply the internal sync signal mode.
External communication terminal
The terminal is to be used by Sony servicemen only for
external communication.
75Q/2ka selector
Switches the impedance of the SYNC IN connectors
termination to 75Q or to 2kQ. When external sync
signals are input, normally set this selector to the 750
position. If good synchronization cannot be obtained, set
this selector to the 2kO position.
RESET button ® (D
Press to clear every user-stored display condition for 15
different types of inpuf signals.
Press fhe button while the power is turned on.
8
Page 9
Connection
Connect the computer using the supplied signal connecting cable as shown.
When connecting with other cables, refer to the instruction manual supplied with the
cable or the computer.
o
to a wall outlet
Supplied
power cord
Page 10
Preset Mode
The GDM-2038 adjusts automatically the display size and position to the optimum in
accordance with the input signals of up to 24 different types.
It has factory-preset setting values for 9 different types of signals. When a
computer or a work station that issues such signal is connected, the optimum display
is obtained without any manual adjustment (preset mode).
The factory-preset values and corresponding computer/work station models (called
“preset-type models” in this manual) are as follows:
No. Display
(dots X lines)
640 X 480 31.5 kHz 60 Hz Non Interlace
2 720 X 400
3 640 X 480 37.9 kHz 73 Hz Non Interlace VESA**
4
800 X 600 48.1 kHz 72 Hz Non Interlace VESA**
5 1024x768 56.5 kHz 70 Hz Non Interlace VESA**
6 1024x768 57.9 kHz 72 Hz
7 1152x870 68.7 kHz
1280x1024
8
1280X1024 81.2 kHz
9
* VGA is the trademark of International Business Machines Corporation.
** VESA is the trademark of a non-profit organization, Video Electronics Standard
Association.
*** Macintosh II is the trademark of Apple Computer Inc.
The buttons on the front panel allow manual adjustment when a signal from
equipment other than the preset-type models is input. Fifteen different manually
adjusted conditions are stored in memory, and called back when the same signal
is input again so that the optimum display for this signal is obtained automatically.
The type of input video signal is discriminated according to its signal specifications,
such as horizontal frequency or sync polarity. When the signal specifications of the
input signals are almost similar, however, these signals may not be discriminated
as different.
Horizontal
frequency
31.5 kHz 70 Hz Non Interlace VGA text*
78.9 kHz 74 Hz Non Interlace
Vertical
frequency
75 Hz Non Interlace
76 Hz Non interlace —
Scanning
mode
VGA graphic*
Non Interlace
Macintosh II***
Two-Page
Preset-type
signals
—
—
10
Page 11
Adjustment
Adjusting the Picture Quality
When a computer or a work station of one of fhe presef-type models or equivalent
(see page 10) is connected, no picture adjustment is necessary.
In other cases, proceed as follows to get the optimum picture.
Turn on the unit, and feed the video signai from the connected computer/work station.
Press the SELECT <iyi> buttons to choose the adjustment item.
The indicator corresponding to the selected item lights up.
When the power is turned on, the O/Q indicator is lit.
Pressing the SELECT < button changes the item in the following order:
9/0 ^ B/O' ^ OD/© ^
0/0 ^ 0/0 -> ffl/®
Pressing the SELECT t> button changes the item in the reversed order.
For what the indicators mean and how to make an adjustment, see the next page.
Observe the picture, and press the ADJUST +/- buttons (biue) or (red) while the target indicator is lit.
To adjust the item shown below the indicator, use the ADJUST +/- buttons (blue).
To adjust the item shown above the indicator, use the ADJUST +/- buttons (red).
If you do not press the SELECT <I/I> buttons or the ADJUST +/- buttons within 10
seconds, the 9/a indicator lights up again.
11
Page 12
Adjustment
What the Indicators Mean and How to Adjust
Indicator that is lit Meaning/How to adjust
Adjust the contrast of the picture.
3
O
0
CD
CD
©
n
D
O
O
®
Press ADJUST + (red) for more contrast.
Press ADJUST - (red) for iess contrasf.
Adjust the brightness of the picture.
Press ADJUST + (biue) for more brightness.
Press ADJUST - (biue) for iess brightness.
Adjust the horizontai size of the picture.
Press ADJUST + (red) to eniarge the horizontai size.
Press ADJUST - (red) to diminish it.
Adjust the horizontal centering of the picture.
Press ADJUST + (blue) to move the picture to the right.
Press ADJUST - (biue) to move it to the ieft.
Adjust the vertical size of the picture.
Press ADJUST + (red) to enlarge the vertical size.
Press ADJUST - (red) to diminish it.
Adjust the vertical centering of the picture.
Press ADJUST + (blue) to move the picture upward.
Press ADJUST - (blue) to move it downward.
Adjust the pincushion distortion of the picture.
Press ADJUST + (red) to curve both the right and left sides of the picture outward.
Press ADJUST - (red) to curve them inward.
Adjust the pincushion distortion balance of the picture.
Press ADJUST + (blue) to curve the picture toward the right.
Press ADJUST - (blue) to cunre it toward the left.
Adjust the keystone distortion of the picture.
Press ADJUST + (red) to diminish the lower part of the picture.
Press ADJUST - (red) to diminish the upper part of the picture.
Adjust the keystone distortion balance of the picture.
Press ADJUST + (blue) to tilt the picture to the right.
Press ADJUST - (blue) to tilt it to the left.
Adjust the horizontal static convergence.
Press ADJUST + (red) to move blue colors to the left and red colors to the right.
Press ADJUST - (red) to move blue colors to the right and red colors to the left.
Adjust while observing the center of the picture.
Adjust the vertical static convergence.
Press ADJUST + (blue) to move red colors upward and blue colors downward.
Press ADJUST - (blue) to move red colors downward and blue colors upward.
Adjust while observihg the center of fhe picture.
The indicator blinks when .
12
The limit vaiue is achieved by pressing the ADJUST + or - button.
Page 13
Adjusting the Color Temperature
Slide the COLOR SELECT switch to seiect the color temperature to be adjusted.
COLOR SELECT
[TO @
--------------
R — G—B
æ o □
CD CD IC3 C3
æ o D
e 'ar.
CD
e
SELECT ADJUST
o I b|
Press the color adjustment button with the tip of a baii-point pen or a simiiar object.
The color adjustment indicator iights.
Press the SELECT </t> buttons to select the color element out of R(Red), G(Green), and B(Blue) to be adjusted.
The indicator corresponding to the selected element lights.
COLOR SELECT
II i II @
--------------R------G-----CD ^ CD^ CD CD CD CD à
B
' O □ O) © 3
O © CD o
SELECT
SDlEil
ADJUST
FT®
I e: I V
o
Press the ADJUST +/- buttons (red) while the indicator is lit.
COLOR SELECT -t=.
m----------------
lllfll @
---------R------G-----CD CD CD CD IC3 ICD Cp
B SELECT
O O CD © 3
"/ O □ © 3) Q
ai 1 IE)
If you do not press the SELECT <1/D> buttons or the ADJUST +/- buttons (red) within
60 seconds, the color temperature adjustment mode is automatically canceled.
Press the color adjustment button again.
The color adjustment indicator goes off. The adjusted values are automatically stored
in memory and the adjustment mode of color temperature is released.
13
Page 14
Adjustment
Storing the Adjusted Condition
The adjusted display condition is stored in memory under the following conditions:
• When you select another adjustment item by pessing the SELECT </> buttons.
• When 10 seconds have elapsed after the adjustment and the 3/a indicator is lit.
The upper 8 adjustment items listed below are stored for each different input signal of
up to 15 types.
The lower 4 adjustment items are stored independently from the types of input
signals.
When the 16th condition is stored
Adjustment item
e
(horizontal size)
O
(horizontal centering)
GD
(vertical size)
0
(vertical centering)
a
(pincushion distortion)
D
(pincushion distortion
balance)
Q
(keystone distortion)
O
(keystone distortion
balance)
3 (contrast) They are stored independently from the input
(brightness)
®
(horizontal static
convergence) unit, or by being affected by the terrestrial
*
(vertical static convergence)
The condition stored first is replaced by the 16th.
Care should be taken when a number of different conditions are to be stored.
They are stored together with the type of the
input signai.
The adjusted condition for up to 15 different input
signals can be stored.
The stored condition is called back from memory
when the corresponding signal is input, and the
optimum display is obtained for this signal.
signal.
Normally adjust the convergence when red and
blue colors are shifted due to the direction of the
magnetism.
How stored
if you modify the condition for the preset-type modeis
It also will be stored in memory. When called back from memory, priority is given to
the modified condition. When the user-stored conditions are cleared, the factorypreset conditions return.
14
Page 15
Clearing the User-Stored Condition for Picture Quality
Method 1
(Clearing the unnecessary
user-stored conditions only
for 9, a, and ® )
Method 2
(Clearing the unnecessary
user-stored conditions only
for the items other than those
of Method 1)
User-stored conditions for the four itmes can be cleared independently from the input
signal.
Press the SELECT <3 and i> buttons to choose the item whose user-stored condition
you want to clear. While the target indicator is lit, press the ADJUST < and l>
buttons (red) tor 9 (contrast) and ® (horizontal static convergence), or (blue) for Q
(brightness) and ffl (vertical static convergence), simultaneously for 5 seconds or
longer. The user-stored condition is reset to factory-preset condition.
Input the signal whose user-stored conditions you want to clear while the power is
turned on.
Press the SELECT <3 and > buttons simultaneously for 5 seconds or longer. The
relevant user-stored conditions are reset to factory-preset conditions.
Method 3
(Clearing all the user-stored conditions at once)
Press the RESET button at the rear with the tip of a ball-point pen or a similar object
while the power is turned on. All the user-stored conditions are reset to factory-preset
conditions at once.
When the user-stored condition is cieared
The 7 indicators light up at the same time (for about 0.25 seconds).
15
Page 16
Adjustment
Clearing the User-Stored Condition for Coior Temperature
Method 1
(Clearing the unnecessary
user-stored conditions only)
Method 2
(Clearing all the user-stored
conditions at once)
Select the color temperature by using the COLOR SELECT switch while the power is
turned on. Press the coior adjustment button. Then press the SELECT < and >
buttons simuitaneousiy for 5 seconds or ionger whiie the coior adjustment indicator is
iit. The user-stored conditions of the seiected color temperature are reset to factorypreset conditions.
Press the color adjustment button while the power is turned on. While the color
adjustment indicator is lit, press the RESET button at the rear with the tip of a ball
point pen or a similar object. All the user-stored conditions are reset to factory-preset
conditions at once.
16
Page 17
Specifications
Picture tube
Effective picture size
Resolution
Display picture size
Deflection frequency
AC input voltage/current
Dimensions
Weight
Supplied accessory
Design and specifications are subject to change without
notice.
0.30 mm aperture grill pitch
20 inches measured diagonally
(19" visual)
90-degree deflection
Approx. 384 X 290 mm (w/h)
(15 '/4 X 11 '/2 inches)
Horizontal : 320* to 1280 dots
(*VGA mode)
Vertical : 200* to 1024 lines
(*VGA mode)
Approx. 373 X 280 mm (w/h)
(14 %x 11 inches)
or
Approx. 350 X 280 mm (w/h)
(13 % X 11 inches)
Horizontal : 28 to 85 kHz
Vertical: 50 to 160 Hz
100 to 120 V, Max. 3.7 A
220 to 240 V, 2.0 A
480 X 479 X 504.5 mm (w/h/d)
(19 X 18 Ve X 19 Ve inches)
Approx. 32 kg (70 lb 9 oz)
AC power cord (for 100 to 120 V
only)
Signal cable (VGA - BNC x 5)
15-pin adaptor
Supplied Signal Connecting Cable
The pin assignment of the supplied signal connecting cable
is shown below.
Red #—
Green I—i^UI Video sgnals
Blue
GND
GND
N.C.
Horizontal
sync signal
sync signal
15-pin D-sub connector
White
Blackl—Vertical
Pin No. Signal Pin No. Signal
1 Red video 9 N.C.
2 Green video 10
3
Blue video
4 GND 12 N.C.
N.C. 13 Horizontal sync
5
Red GND 14 Vertical sync
6
7
Green GND 15
Blue GND
8
11
17
Page 18
Specifications
Detailed Timing Specifications of Preset-Type Models
Mode
Equiv, Standard
Resolution (Hx V) 640 X 480
Dot Clock (MHz) 25.175
Horizontal**
Hor. freq. (kHz)
H-total
H-Front porch
H-Sync. width
H-Back porch
H-blanking
H-Act(ve
(psec)
Vertical
Ver. freq. (Hz)
V-total
V-Front porch
V-Sync. width
V-Back porch
V-blanking 45
V-Active
(Lines)
Sync,
H-Polarity
V-Polarity
Scanning mode
1 2 3
VGA
Graphics*
External
VGA
Text*
720 X 400 640 X 480
28.332
31.469
31.778
0.636 0.635
3.813 3.813
1.907 1.906
6.356 6.353
25.422 25.413
59.94 70.11 72.81
525 449
480 400
31.480 37.860
31.766 26.413
10
2
33 35
External External
12 9
2 3
49 40
(-) (-)
H
Non
interlace
(+)
Non
interlace
VGA does not include border area.
Recomended horizontal timing conditions:
Horizontal front porch should be: >0.1psec
Horizontal sync, width should be: >1.0psec
Horizontal back porch should be: >1.2psec
Horizontal blanking width should be: >3.5psec
4 5
VESA
VESA VESA
800 X 600 1024x768
31.500 50.000
48.077 56.476 57.870
20.800
0.762
1.270 2.400
4.603 1.280
6.095
20.317 16.000
520 666
28 23
480 600
1.120 0.320 0.320
4.800 4.053
72.19
External External
37 3
6 6 6
66 38
(-) (+)
(-) (+) (-)
Non
interlace
Non
interlace
6 7 8
—
1024x768 1152x870
75.000 75.000 100.000
17.707 17.280 14.560
1.813 1.920
1.920 1.387 1.440
3.627 3.040 3.200
13.653 13.653 11.520
70.07 71.8 75.06
806 806 915
3 3 3
29 29 39
38 45 40
768 768
Internal External Internal
(-)
Non
interlace
N.A.
N.A.
Non
interlace
Macintosh II
Two-Page
68.681 78.855
0.320
1.280 1.067
3 3
870 1024
(-)
H
Non
interlace
—
1280 X 1024
135.000
12.681
0.237
1.896
9.481
74.11
1064
N.A.
N.A.
Noninterlace
9
1280X1024
140.000
81.206
12.314
0.229
0.714
2.229
3.171
9.143
76.18
1066
3
3
Internal
N.A.
N.A.
Non
interlace
36
42
1024
34
18
Page 19
Appendix
Sony Display Memory System
The GDM-2038 incorporates the Sony Display Memory
System (SDMS) that allows it to discriminate between the
types of input signals and to automatically display the
optimum picture.
The SDMS has a large-capacity non-volatile memory in
which the display conditions for each input signal is stored.
When the signal is input, the corresponding display
conditions are called back from the memory and the unit is
automatically adjusted for the signal.
It also has a video muting function. This function eliminates
display distortions that may occur when the input video
signal is changed.
Detailed explanation of the SDMS memory and the muting
function are given below.
The SDMS memory
There are two types of memory: factory-preset memory and
user memory.
Factory-preset memory
As explained in "Preset Mode” on page 10 optimum display
conditions for the 9 preset-type models (see the chart to the
right) are stored in the memory area at the factory. No
manual adjustment is necessary for these preset -type
models.
The contents in this memory area can neither be modified
nor erased by users. If you modify conditions while the
signals are input from a preset-type model, the newly set
conditions will be stored in the user memory area.
Priority is given to the modified conditions stored in the user
memory.
User memory
All the manual adjustments and modifications of an existing
condition you make are stored in this memory area.
They are stored together with the type of the input signal
and called back from the memory when the signal Is Input
again.
If you modify the condition already stored In the user
memory, only the corresponding values are changed.
The modified condition is not newly added to the memory.
VGA graphic
VGA text
VESA
VESA
VESA
1024x768
Macintosh II
Two page
8 1280 X1024
9 1280 X1024
The user can store
the conditions for
up to 15 unique
video signals or
change the existing
factory-preset
8 condition in this
9 memory area.
14
15
Sony Display Memory System memory map
The factory-preset
conditions are not modified
or erased by user input.
Upon reset of the system,
all the oontents of the user
memory are cleared, but
the factory-preset
conditions in this memory
area are not cleared.
If more than 15 conditions
are programmed into the
user memory area, the last
input condition will replace
the first user input.
The 16th entry moves
to 1st location in the
user memory.
The video muting system
If the input video signal ohanges, the muting circuit senses
the change and mutes the screen. This function eliminates
scrambled images during the scanning transition.
Video frequency
or sync polarity —\
change }
On display
Muting
Dark screen
New video
/■—^ frequency or
1
sync polarity
On display
□
The muting duration differs depending on the time that takes
until the newly input signal is stabilized.
It will last a minimum of 1.5 seconds approximately.
19
Page 20
Appendix
Sony Trinitron System
Sony used its skilled research and development teams to
create the first Trinitron TV, introduced 20 years ago. Some
40 million Trinitrons have been sold worldwide so far, and
Sony won the Emmy Award for technical quality in 1973,
Its Super Fine Pitch (the narrowest dot pitch in the industry
for each CRT size class) provides images that are just as
sharp and clear as prints, making it most suitable for
computer graphics, not to mention TV broadcasts.
Features
Clear, crisp, and easy-to-read screen
Trinitron’s black screen increases the contrast by 50 percent,
and its 1-gun, 3-beam system with one large lens allows
more precise color beam focusing. Thus colors are
reproduced more distinctly. Higher contrast also recreates
computer graphics and characters that are crisp, clear, and
easy to read.
Display with less glare and distortion
Only Trinitron incorporates a cylindrical screen with a
completely straight, vertically flat surface.
The cylindrical screen delivers a clear undistorted picture,
and also eliminates ambient light reflection, for long viewing
without fatigue.
Brighter picture and more accurate colors
Sony’s exclusive Aperture Grille with long and unbroken slits
delivers more color and brightness to the screen.
The result is a brighter and more beautiful picture.
This Grille is stabilized with two damper wires. \A/hen viewing
images with light backgrounds, these wires are sometimes
visible as two fine lines.
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system
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