
SDM-HS74/HS74P
SERVICE MANUAL
US Model
Canadian Model
AEP Model
Chinese Model
O
K
M
E
N
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TFT LCD COLOR COMPUTER DISPLAY

HS74 TPV
Model name Colour Main destination CPT AUO
SDM-HS74 WHITE AEP 1,240,001-1,270,000 1,270,001-1,290,000
SDM-HS74 BLUE AEP 1,290,001-1,320,000 1,320,001-1,340,000
SDM-HS74 BLACK AEP 1,340,001-1,480,000 1,480,001-1,560,000
HS74P LGE
Model name Colour Main destination AUO
SDM-HS74P BLACK AEP 1,260,001-1,400,000
SDM-HS74P SILVER AEP 6,200,001-6,400,000
SDM-HS74P BLACK U/C 9,940,001-9,960,000
SDM-HS74P SILVER U/C 6,000,001-6,200,000
SDM-HS74P SILVER CH 6,600,001-6,630,000
– 2 –
SDM-HS74/HS74P (E)

CONTENTS
SPECIFICATIONS ................................................... 2
SIGNAL CONNECTOR PIN ASSIGNMENT ........... 3
PRECAUTION
TIMING CHART
OPERATING INSTRUCTIONS
......................................................... 4
....................................................... 5
................................ 6
WIRING DIAGRAM ................................................. 7
BLOCK DIAGRAM .................................................. 8
SPECIFICATIONS
1. LCD CHARACTERISTICS
[HS74]
Type
Active Display Area : 17 inch(337.92(H) x 270.336(V))
Size : 358.5(W) x 296.5(H) x 19.0(D)
Pixel Pitch : 0.264 (Per one triad) x 0.264
Color Depth : 16.2M Colors
Electrical Interface : LVDS
Operating Mode : Normally White
Backlight Unit : 4-CCFL (Cold Cathode
[HS74P]
Type : TFT Color LCD Module
Active Display Area : 17 inch(337.92(H) x 270.336(V))
Size : 358.5(W) x 296.5(H) x 19.5(D)
Pixel Pitch : 0.264 (Per one triad) x 0.264
Color Depth
Electrical Interface
Operating Mode : Normally White
Backlight Unit : 4-CCFL (Cold Cathode
: TFT Color LCD Module
Fluorescent Lamp)
: 262K Colors
: LVDS
Fluorescent Lamp)
DESCRIPTION OF BLOCK DIAGRAM ................ 9
LIPS BOARD BLOCK DIAGRAM ......................... 10
ADJUSTMENT ....................................................... 11
SERVICE OSD EXPLODED VIEW .........................12
EXPLODED VIEW...................................................13
EXPLODED VIEW PARTS LIST ............................14
3-3. Operating Frequency
Horizontal : 28 ~ 80kHz
Ver tical : 48 ~ 75Hz
.
Max. Resolution
4
Analog : 1280 x 1024 / 75Hz
Digital : 1280 x 1024 / 60Hz
5. POWER SUPPLY
5-1. Power
5-2. Power Consumption
POWER ON (NORMAL)
STAND-BY
SUSPEND
DPMS OFF
POWER S/W OFF
: AC 100~240V, 50/60Hz , 1.0A
MODE
H/V SYNC
ON/ON
OFF/ON
ON/OFF
OFF/OFF
VIDEO
ACTIVE
OFF
OFF
OFF
-
-
POWER CONSUMPTION
less than 45 W
less than 1 W
less than 1 W
less than 1 W
less than 1 W
LED COLOR
GREEN
AMBER
AMBER
AMBER
OFF
2. OPTICAL CHARACTERISTICS
≥
2-1. Viewing Angle by Contrast Ratio
10
Left : -60° min., -70°(Typ) Right : +60° min., +70°(Typ)
Top :+60° min., +70°(Typ) Bottom : -60°min., -70°(Typ)
2-2. Luminance
HS74
HS74P
: 200(min), 250(Typ)
: 350(min), 400(Typ)
2-3. Contrast Ratio : 250(min), 450(Typ)
3. SIGNAL (Refer to the Timing Chart)
3-1. Sync Signal
• Type : Separate Sync
3-2. Video Input Signal
1) Type : R, G, B Analog
2) Voltage Level : 0~0.70 V(
±5%)
a) Color 0, 0 : 0 Vp-p
b) Color 7, 0 : 0.35 Vp-p
c) Color 15, 0 : 0.7 Vp-p
3) Input Impedance : 75 Ω
6. ENVIRONMENT
6-1. Operating Temperature: 5°C~35°C (41°F~95°F)
(Ambient)
6-2. Relative Humidity : 10%~80%
(Non-condensing)
6-3. MTBF : 50,000 Hours(Typ)
30,000 Hours(Min)
7. DIMENSIONS (with TILT/SWIVEL)
Width : 441 mm (17.4'')
Depth : 216 mm (8.5'')
Height : 404 mm (15.9'')
8. WEIGHT (with TILT/SWIVEL)
Net. Weight : 5.7 kg (12.57 lbs)
Gross Weight : 8.3 kg (18.30 lbs)
– 3 –
SDM-HS74/HS74P (E)

Signal Connector Pin Assignment
• DVI-D Connector
Pin Signal (DVI-D)
T. M. D. S. Data2-
1
T. M. D. S. Data2+
2
T. M. D. S. Data2/4 Shield
3
T. M. D. S. Data4-
4
T. M. D. S. Data4+
5
DDC Clock
6
DDC Data
7
Analog Vertical Sync.
8
T. M. D. S. Data1-
9
T. M. D. S. Data1+
10
T. M. D. S. Data1/3 Shield
11
T. M. D. S. Data3-
12
T. M. D. S. Data3+
13
+5V Power
14
Ground
15
T. M. D. S. (Transition Minimized Differential Signaling)
(return for +5V,
H. Sync. and V. Sync.)
Pin Signal (DVI-D)
Hot Plug Detect
16
T. M. D. S. Data0-
17
T. M. D. S. Data0+
18
T. M. D. S. Data0/5 Shield
19
T. M. D. S. Data5-
20
T. M. D. S. Data5+
21
T. M. D. S. Clock Shield
22
T. M. D. S. Clock+
23
T. M. D. S. Clock-
24
– 4 –
SDM-HS74/HS74P (E)

PRECAUTION
WARNING FOR THE SAFETY-RELATED COMPONENT.
• There are some special components used in LCD
monitor that are important for safety.
These parts are
marked on the schematic diagram and the
replacement parts list.
parts should be replaced with the manufacturer’s
specified parts to prevent electric shock, fire or other
hazard.
•Do not modify original design without obtaining written
permission from manufacturer or you will void the
original parts and labor guarantee.
TAKE CARE DURING HANDLING THE LCD MODULE
WITH BACKLIGHT UNIT.
•Must mount the module using mounting holes arranged
in four corners.
•Do not press on the panel, edge of the frame strongly
or electric shock as this will result in damage to the
screen.
•Do not scratch or press on the panel with any sharp
objects, such as pencil or pen as this may result in
damage to the panel.
It is essential that these critical
WARNING
BE CAREFUL ELECTRIC SHOCK !
• If you want to replace with the new backlight (CCFL) or
inverter circuit, must disconnect the AC adapter
because high voltage appears at inverter circuit about
650Vrms.
•Handle with care wires or connectors of the inverter
circuit. If the wires are pressed cause short and may
burn or take fire.
•Protect the module from the ESD as it may damage the
electronic circuit (C-MOS).
•Make certain that treatment person’s body are
grounded through wrist band.
•Do not leave the module in high temperature and in
areas of high humidity for a long time.
• The module not be exposed to the direct sunlight.
•Avoid contact with water as it may a short circuit within
the module.
• If the surface of panel become dirty, please wipe it off
with a softmaterial. (Cleaning with a dirty or rough cloth
may damage the panel.)
CAUTION
Please use only a plastic screwdriver to protect yourself
from shock hazard during service operation.
– 5 –
SDM-HS74/HS74P (E)