Rosewill R910E User manual

R910E Service Manual
SERVICE MANUAL
19” ABSPC Monitor
R910E Series
THESE DOCUMENTS ARE FOR REPAIR SERVICE INFORMATION ONLY.EVERY
REASONABLE EFFORT HAS BEEN MADE TO ENSURE THE ACCURACY OF THIS MANUAL;
WE CANNOT GUARANTEE THE ACCURACY OFTHIS INFORMATION AFTER THE DATE OF
PUBLICATION AND DISCLAIMS RELIABILITY FOR CHANGES, ERRORS OR OMISSIONS.
Manufacture Date: Nov-09-04

R910E Service Manual
2
Table of Contents
Table of Contents ------------------------------------------------------------------------------------------------------------ 02
Revision List ------------------------------------------------------------------------------------------------------------------ 04
1.Product Feature --------------------------------------------------------------------------------------------------------------05
2. LCD Monitor Description ------------------------------------------------------------------------------------------------06
3. Operation Instructions ---------------------------------------------------------------------------------------------------07
3.1 General Instructions -------------------------------------------------------------------------------------------------07
3.2 Control Button ---------------------------------------------------------------------------------------------------------07
3.2.1 Key Control ------------------------------------------------------------------------------------------------------07
3.2.2 Key Function -----------------------------------------------------------------------------------------------------07
3.3 Adjusting The Picture -----------------------------------------------------------------------------------------------08
4. Input/Output Specification --------------------------------------------------------------------------------------------- 10
4.1 Input Signal Connector ---------------------------------------------------------------------------------------------10
4.2 Factory Preset Display Modes ------------------------------------------------------------------------------------10
4.3 Power Supply Requirements --------------------------------------------------------------------------------------11
4.4 Panel Specification ----------------------------------------------------------------------------------------------12
4.4.1 Panel Feature -----------------------------------------------------------------------------------------------12
4.4.2 Display Characteristics -------------------------------------------------------------------------------------12
4.4.3 Optical Characteristics ------------------------------------------------------------------------------------13
4.4.4 TFT Module --------------------------------------------------------------------------------------------------14
4.4.5 Backlight Unit ----------------------------------------------------------------------------------------------14
5. Block Diagram -------------------------------------------------------------------------------------------------------------15
5.1 Software Flow Chart -------------------------------------------------------------------------------------------------15
5.2 Electrical Block Diagram -------------------------------------------------------------------------------------------17

R910E Service Manual
3
5.2.1 Scalar Board Diagram -------------------------------------------------------------------------------------------------17
5.2.2 Inverter Board Diagram ------------------------------------------------------------------------------------------------18
6.Schematic-----------------------------------------------------------------------------------------------------------------------------19
6.1 Scalar Board --------- -------------------------------------------------------------------------------------------------------19
6.2 Inverter Board ----------------------------------------------------------------------------------------------------------------27
7. Maintainability -------- -------------------------------------------------------------------------------------------------------------28
7.1 Equipments and Tools Requirements ---------------------------------------------------------------------------------28
7.2 Trouble Shooting -----------------------------------------------------------------------------------------------------------29
7.2.1 Main Board -------------------------------------------------------------------------------------------------------------29
7.2.2 Key Pad Board ----------------------------------------------------------------------------------------------------------31
7.2.3 Inverter Board ----------------------------------------------------------------------------------------------------------32
8. White-Balance, Luminance Adjustment ---------------------------------------------------------------------------------- 33
9. BOM List --------------------------------------------------------------------------------------------------------------------35～50

R910E Service Manual
4
Revision List
Revision Date Change Description
A00 Nov-09-04

R910E Service Manual
5
1. PRODUCT FEATURE
Driving system TFT Color LCD
Size 48cm(19.0")
Pixel pitch 0.294mm(H) x 0.294mm(V)
Viewable angle 170°(H) 170°(V)
LCD Panel
Response time 25 ms (Typical)
R,G,B Analog Interface
Video
Digital Interface
Separate Sync H/V TTL
H-Frequency 24KHz – 93KHz (Analog)
Input
V-Frequency 55-85Hz (Analog)
Display Colors 16.7M Colors
Dot Clock 158MHz (Analog)
Max. Resolution 1280 x 1024 @85Hz(Analog)
Plug & Play VESA DDC1/2BTM
ON Mode <60W
EPA ENERGY STAR®
OFF Mode <5W
Audio output Rated Power 2.0W (Per channel)
D-Sub 15pin
Input Connector
DVI 24pin
Analog: 0.7Vp-p(standard),
75 OHM, Positive
Input Video Signal
Digital signal
Maximum Screen Size Horizontal: 376.32mm
Vertical: 301.056mm
Power Source 12VDC/5.0A 60W Max
Environmental
Considerations
Operating Temp: 0° to 40°C
Storage Temp: -10° to 50°C
Operating Humidity:
20% to 90%
Weight (N. W.): 5.9Kgs Unit (net)
Dimensions 432 (W) x 440 (H) x 198 (D) mm

R910E Service Manual
6
2. LCD MONITOR DESCRIPTION
The LCD MONITOR will contain a main board, an inverter/power board, an audio board and a keypad board which
house the flat panel control logic, brightness control logic and DDC.
The power board will provide AC to DC Inverter voltage to drive the backlight of panel and the main board chips
each voltage.
Video signal, DDC
Power board
(
Include: ada
p
ter, inverter
)
Flat Panel and
CCFL
Main Board
Keyboard
RS232 Connector For
white balance adjustment
in factory mode
HOST Computer
CCFL Drive.
AC-IN
100V-240V
Monitor Block Diagram
Audio board

R910E Service Manual
7
3. OPERATING INSTRUCTIONS
3.1 GENERAL INSTRUCTIONS
Press the power button to turn the monitor on or off. The other control buttons are located at front panel of the
monitor. By changing these settings, the picture can be adjusted to your personal preferences.
-The power cord should be connected.
-Connect the video cable from the monitor to the video card.
-Press the power button to turn on the monitor, the power indicator will light up.
3.2 CONTROL BUTTONS
3.2.1 KEY CONTROL
3.2.2 KEY FUNCTION
•⑥Power Button:
Press this button to switch the monitor’s power ON or OFF.
•④MENU / ENTER:
Activate OSD menu when OSD is OFF or activate/de-activate adjustment function when OSD is ON or Exit OSD menu when
in Brightness/ Contrast OSD status.
•②Brightness / :
Adjust brightness or function adjust.
•⑦Headphone Jack
•③Contrast / :
Adjust contrast or function adjust.
•①Auto Adjust button / Exit:
1. When OSD menu is in active status, this button will act as EXIT-KEY
(EXIT OSD menu)
2. When OSD menu is in OFF, press this button for 2 seconds to activate the Auto Adjustment function.
The Auto Adjustment function is used to set the HPos, VPos, Clock and Focus.
•⑤Power Indicator:
Green — Power On mode.
Orange — Off mode.

R910E Service Manual
8
3.3 ADJUSTING THE PICTURE
1. Press the MENU-button to activate the OSD window. See figure 5.
2. Press or to select the desired function. See figure 5.
3. Press the MENU-button again to activate the highlighted function.
4. Press or to adjust the selected function.
Note: is used to adjust the function down & is used to adjust the function up. This is due to the orientation of the
adjustment level bar.
5. When the OSD window is active, it shows the input signal timing. The "H" stands for the horizontal frequency and "V" for the
vertical frequency.
6. To exit and save, select the exit function, or leave the monitor alone for 10 seconds. If you want to adjust another function
press MENU again and repeat steps 2-4.

R910E Service Manual
9
The descriptions for function control LEDS
1.
Contrast Adjust the picture contrast.
2.
Brightness Adjust the picture brightness.
3. Input Selected Input Signal source selected (select Analog or Digital input source)
4. Focus Adjust picture Focus (available in Analog mode only).
5. Clock Adjust picture Clock (available in Analog mode only).
6.
H- Position Adjust the horizontal position of the picture (available in Analog mode only).
7. V- Position Adjust the vertical position of the picture (available in Analog mode only).
8. Language Multi-Language selection
9. Scaling Mode
Stretch the picture to fit full screen, screen size ratio or native size (this function
only works when the resolution setting is lower than the native resolution of
1280x1024).
10. Red Adjusts Red intensity.
11. Green Adjusts Green intensity.
12. Blue Adjusts Blue intensity.
13. C1 (6500K) Color The color temperature for 6500°K is x=0.313, y=0.329.
14. C2 (7800K) Color The color temperature for 7800°K is x=0.296, y=0.311.
15. Reset
Clear old settings of Auto-configuration, re-activates auto-configuration and set
the color temperature to 7800°K.
16.
Exit Save user adjustment and exit OSD menu.

R910E Service Manual
10
4. INPUT/OUTPUT SPECFICATION
4.1 ANALOG INPUT SIGNAL CONNECTOR
PIN NO. DESCRIPTION PI N NO. DESCRIPTION
1. Red 9. +5V
2. Green 10. Detect Cable
3. Blue 11. NC
4. Ground 12. DDC-Serial Data
5. Ground 13. H-Sync
6. R-Ground 14. V-Sync
7. G-Ground 15. DDC-Serial Clock
8. B-Ground
VGA Connector layout
15
610
11 15
4.2 DVI INPUT SIGNAL CONNECTOR
Pin Meaning Pin Meaning Pin Meaning
1. TMDS Data2- 9. TMDS Data1- 17. TMDS Data0-
2. TMDS Data2+ 10. TMDS Data1+ 18. TMDS Data0+
3. TMDS Data 2/4 Shield 11. TMDS Data 1/3 Shield 19. TMDS Data 0/5 Shield
4. TMDS Data4- 12. TMDS Data3- 20. TMDS Data5-
5. TMDS Data4+ 13. TMDS Data3+ 21. TMDS Data5+
6. DDC Clock 14. +5V Power 22. TMDS Clock Shield
7. DDC Data 15. GND (For +5V) 23. TMDS Clock+
8. N.C. 16. Hot Plug Detect 24. DDC TMDS Clock-
24-Pin Color Display Signal Cable

R910E Service Manual
11
4.3 FACTORY PRESET DISPLAY MODES
STANDARD
RESOLUTION
HORIZONTAL
FREQUENCY
VERTICAL
FREQUENCY
640 × 350 31.47kHz 70.0Hz
640 x 400 31.47kHz 70.0Hz
Dos-mode
720 x 400 31.47kHz 70.0Hz
640 × 480 31.47kHz 60.0Hz
640 × 480 35.00kHz 66.6Hz
640 × 480 37.50kHz 75.0Hz
VGA
640 × 480 37.86kHz 72.0Hz
800 × 600 37.879kHz 60.0Hz
800 × 600 46.875kHz 75.0Hz
800 × 600 35.16kHz 56.0Hz
800 × 600 48.01kHz 72.0Hz
SVGA
832 × 624 49.725kHz 75.0Hz
1024 × 768 48.363kHz 60.0Hz
1024 × 768 56.476kHz 70.0Hz
XGA
1024 × 768 60.021kHz 75.0Hz
1280 × 1024 64.000kHz 60.0Hz
1280 × 1024 80.000kHz 75.0Hz
SXGA
1280 × 1024 91.146kHz 85.0Hz
1152 × 864 79.976kHz 75.0Hz
1280 × 960 60.000kHz 60.0Hz
1280 × 960 80.000kHz 85.0Hz
Note: The factory preset mode for DOS is 720×400 @70 Hz.

R910E Service Manual
12
4.4 PANEL SPECIFICATION
4.4.1 Panel Feature
•48cm (19”) TFT Color LCD Monitor
•High-speed response
•Recommended SXGA Resolutions: 1280 X 1024 @60Hz
•EPA ENERGY STAR®
•Dual Input (DVI + Analog)
•Space Saving, Compact Case Design
•High contrast ratio, high aperture structure
•PVA (Patterned Vertical Alignment) mode
•Wide viewing angle
•Low power consumption
•2 Dual CCFTs (Cold Cathode Fluorescent Tube)
•DE only mode
•LVDS (Low Voltage Differential Signaling) interface (2 pixel/ clock)
4.4.2 Display Characteristics

R910E Service Manual
13
4.4.3 Optical Characteristics
The optical characteristics are measured under stable conditions at 25℃(Room Temperature)：

R910E Service Manual
14
4.4.4 TFT Module
4.4.5 Backlight Unit
The backlight system is an edge-lighting type with 2 dual CCFTs (Cold Cathode Fluorescent Tube), the
characteristics of two dual lamps are shown in the following table.

R910E Service Manual
15
5. BLOCK DIAGRA
5.1 SOFTWARE FLOW CHAR
1
2
N
Y
5
Y
N
10
Y
N
12
Y
N
7
Y
N
6
4
3
8
9
14
11
13
Y
N
1
5
Y
N
16
1
7
19
Y
N
18

R910E Service Manual
16
1) MCU initialize.
2) Is the eeprom blank?
3) Program the eeprom by default values.
4) Get the PWM value of brightness from eeprom.
5) Is the power key pressed?
6) Clear all global flags.
7) Are the AUTO and SELECT keys pressed?
8) Enter factory mode.
9) Save the power key status into eeprom.
Turn on the LED and set it to green color.
Scaler initialize.
10) In standby mode?
11) Update the life time of back light.
12) Check the analog port, are there any signals coming?
13) Does the scalar send out an interrupt request?
14) Wake up the scalar.
15) Are there any signals coming from analog port?
16) Display "No connection Check Signal Cable" message. And go into
standby mode after the message disappear.
17) Program the scalar to be able to show the coming mode.
18) Process the OSD display.
19) Read the keyboard. Is the power key pressed?

R910E Service Manual
17
5.2 ELECTRICAL BLOCK DIAGRAM
5.2.1 SCALAR BOARD BLOCK DIAGRAM
SCALAR GM5020 (U600)
(Include: ACD, OSD)
LCD Interface
MCU
U502
Keyboard
Crystal (X600)
24MHZ
EEPROM
24LC16 D-Sub
Connector
EEPROM
24LC21A
DVI
Connector
EEPROM
AT24C02N

R910E Service Manual
18
5.2.2 INVERTER/POWER BOARD BLOCK DIAGRAM
Inverter Block Diagram

R910E Service Manual
19
6. Schematic
6.1 Main board
+5V
+5V
GND
RX2- SHEET 5.Gm5020
VS (U303.8---U601.K1)
RX1+ (CN302.10---U601.C9)
VGA_5V
AGND
R326
10K
GREEN- SHEET 5.Gm5020
VSYNC
RXC- SHEET 5.Gm5020
C313
100 pF
BLUE+ (C305---U601.C1)
AGND
AGND
HS SHEET 5.Gm5020
GREEN+ SHEET 5.Gm5020
GND
R332
0R
VGACON
AGND
VGA_SDA
5.Gm5020
RX2+ (CN302.2---U601.C10)
R328
0R(NC)
U303D
74LVT14_ADC(NC)
9 8
V_CON SHEET 4.MCU
R312
47K
GND
R305 100R
C311
1000pF
R316 100R
RX1+ SHEET 5.Gm5020
R333
10K(NC)
GREEN- (C304---U601.D1)
HS (U303.4---U601.L2)
R335
1K(NC)
RX2+IN
R338
10K
R301 10K
R320 100R
C312
100 pF
R315 100R
R317
2.2K
R334
0R
AGND
R308
75R
DVI_5V
RX2- (CN302.1---U601.D10)
HS
Signal Cable the same as T541
AGND
VS_DVI
R325
0R(NC)
U303E
74LVT14_ADC(NC)
11 10
RX0+ (CN302.18---U601.C8)
GND
VS
GREEN+ (C303---U601.D2)
VGA_5V
VSYNC
DVI_PLUG
SHEET 4.MCU
RX0- (CN302.17---U601.D8)
AGNDGND
SCL_IN
RX1-IN
RX1+IN
GND
U303A
74LVT14_ADC(NC)
1 2
R311
47K
CN302
DVI-D
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
RX2-
RX2+
GND
RX4-
RX4+
SCL
SDA
VS
RX1-
RX1+
GND
RX3-
RX3+
5V
GND
HP
RX0-
RX0+
GND
RX5-
RX5+
GND
RXC+
RXC-
C310
47pF
C314
0.1uF
4.MCU
AGND
SDA_IN
U303B
74LVT14_ADC(NC)
3 4
RX1- SHEET 5.Gm5020
AGND
R303 100R
R314 100R
R322
47K
AGND
D310
BAV99
32
1
R324 0R
CN301
DB15HD
1
6
2
7
3
8
4
9
5
11
12
13
14
15
10
R304 100R
RED- (C301---U601.E1)
R336
1K(NC)
C309
47pF
R330
0R
+5V
C301 0.01uF
C302 0.01uF
RX0+IN
+5V
RX2-IN
R307 100R
BLUE+ SHEET 5.Gm5020
RXC+ (CN302.23---U601.C6)
R319 100R
D312
BAV99
32
1
+5V
R327 0R
U301
24C02
84
1
2
3
7
6
5
VCCGND
NC
NC
NC
VCLK
SCL
SDA
SOT23B
D301
BAV70
12
3
C306 0.01uF
BLUE- SHEET 5.Gm5020
AGND
VS
RX0- SHEET 5.Gm5020
R310
75R
C307
0.1uF
RX2+ SHEET 5.Gm5020
HSYNC
HOT_PLUG
C308
0.1uF
RED+ SHEET 5.Gm5020
DVI_5V
D307
5.6V
D306
5.6V
R337 1K
D304
5.6V
910917 EEPROM Option
AGND
R302 100R
AVDD_3.3
D308
5.6V
RX0-IN
C303 0.01uF
R321
47K
RX0+ SHEET 5.Gm5020
U302
24LC21A
84
1
2
3
7
6
5
VCCGND
NC
NC
NC
VCLK
SCL
SDA
/V_CON (R323---U502.24)
R318
2.2K
D311
BAV99
32
1
RXC- (CN302.24---U601.D6)
VGACON
VGA_SCL
R323 100R
D309
5.6V
R329 0R
RXC+IN
RX1- (CN302.9---U601.D9)
HSYNC
VS_DVI
R313 100R
RXC+ SHEET 5.Gm5020
GND
AGND
D305
5.6V
R309
75R
D303
5.6V
RXD
SHEET 4.MCU
C305 0.01uF
AGND
911002 DVI Detected
+5V
TXD
SHEET 4.MCU
VS SHEET 5.Gm5020
BLUE- (C306---U601.C2)
R306 100R
DVI_5V
C304 0.01uF
RED- (C302---U601.E2)
RXC-IN
R331
10K(NC)
SOT23B
D302
BAV70
12
3
RED- SHEET 5.Gm5020

R910E Service Manual
20
HDATA0
C508
22uF
X501 24MHz
CN502
HEADER 6X2
12
34
56
78
910
11 12
HCLK SHEET 5.Gm5020
C512
470uF/16V
V_CON SHEET 3.Input Connectors
GND
P2
RESET_FW (U502.25---R906)
+5V
C521
0.1uF/16V
RXDSHEET 3.Inout Connectors
VGA_CON (U502.24---CN301.5)
GND
WP
C510
100uF
C515
100PF
R505 33R
RP503
10K(8P4R)
1 8 2 7 3 6 4 5
R531 220R
GND
HDATAF[0..3] SHEET 5.Gm5020
R515 10K
C516
22uF(NC) PWM0SHEET 5.Gm5020
R504
10K
6.Display Interface
_BKLT_ON
R509
10K
_PANEL_ENSHEET 6.Display Interface
KEY/SH
HFS SHEET 5.Gm5020
R532
10K
+5V
+5V
C504
22pF
DVI_PLUG SHEET 3.Input Connectors
SDA
R501
10K
Q502
MMBT3904
3
1
2
R526
0R(op)
GND
P1
LVDS_EN SHEET 6.Display Interface
PWM1SHEET 5.Gm5020
PANEL_EN (U502.18---R201)
GND
GND
911002 DVI Detected
R523
0R(op)
STDBY
GND
HDATAF1
P_S_ENSHEET 8.Power
GND
C505
22uF
RXD (U502.11---CN301.11)
C519
0.1uF/16V
GND
C509
0.1UF
RP506
10K(8P4R)
1 2 3 4
8 7 6 5
_BKLT_ON
GND
R522
620R
TXD (U502.13---CN301.4)
HFS/SDA
C522
0.1uF/16V
R502
10K
C514
100PF
HDATAF2
STDBY
RP502
10K(8P4R)
1 8 2 7 3 6 4 5
R506 33R
910918 EMI
SCL
GND
DOS
C520
0.1uF/16V
R521 1K
R528 0R(NC)
R510
10K
D502
1N4148(NC)
1 2
GND
C518
0.1uF/16V
RP504
330R(8P4R)
1
2
3
4
8
7
6
5
ON/OFF
5.Gm5020
+A5V
RXD
R516
10K
TXD
DOS
R519
10K
910918 EMI
+5V
GND
AD
C501
22uF
16V
GND
SDA
R508
47R
PWM0 (U601.N1---R527)
+5V
RXD
HDATA2
GND
GND
R514
10K
TXD
U502
W78E62BP-40
2
3
4
5
6
7
8
9
10
11
13
14
15
16
17
18
19
20
21
22
24
25
26
27
28
29
30
31
32
33
35
36
37
38
39
40
41
42
43
44
1
12
23
34
P1.0/T2
P1.1/T2EX
P1.2/ECI
P1.3/CEX0
P1.4/CEX1
P1.5/CEX2
P1.6/CEX3/WAIT#
P1.7/CEX4/A17/W
RST
P3.0/RXD
P3.1/TXD
P3.2/INT0#
P3.3/INT1#
P3.4/T0
P3.5/T1
P3.6/WR#
P3.7/RD#/A16
XTAL2
XTAL1
VSS
A8/P2.0
A9/P2.1
A10/P2.2
A11/P2.3
A12/P2.4
A13/P2.5
A14/P2.6
A15/P2.7
PSEN#
ALE/PROG#
EA#/VPP
AD7/P0.7
AD6/P0.6
AD5/P0.5
AD4/P0.4
AD3/P0.3
AD2/P0.2
AD1/P0.1
AD0/P0.0
VCC
NIC
NIC
NIC
NIC
WP
C502
0.1uF
+5V
GND
LED AMBER
Internal Program Memory
910918 EMI
R529
620R(NC)
TXDSHEET 3.Inout Connectors
C523
0.1uF/16V
KEY LEFT
MUTE
LED GREEN
HDATA1
KEY ENTER
C503
22pF
/IRQ (U502.14---U601.R3)
GND
GND
HCLK/SCL
HDATA3
3.Input Connectors
910917 ESD 代刚筁
RESET_FW SHEET 5.Gm5020
HFS (U502.31---U601.P2)
+5V
+A5V
KEY/SH
C929
0.1uF/16V
RP507
10K(8P4R)
1 2 3 4
8 7 6 5
+5V
+12V
AD
U501
24LC16B
1
2
3
4 5
6
7
8
A0
A1
A2
VSS SI
SCK
WP
VCC
Q503
MMBT3904
3
1
2
_IRQ
C517
0.1uF/16V
SCL
CP502
1000P
1
5 6 8
4 3 27
GND
HDATAF[0..3](U502.26,27,28,29---U601.R2,R1,P4,P3)
R527 0R(op)
HCLK (U502.30---U601.P1)
+12V
+5V
GND
GND
HDATAF3
D501
1N4148
1 2
GND
POWER
R524
0R(op)
VOL
KEY RIGHT
CN501
Pitch 2.0mm
1
2
3
4
5
6
7
8
9
RP501
33R(8P4R)
1 8
2 7
3 6
4 5
Q501
MMBT3904
3
1
2
GND
+5V
+A5V
P1
CN503
HEADER 6
1
2
3
4
5
6
910917 ESD 代刚筁
+5V
GND
MUTE
R507
47R
L502
CHOKE
R503
10K
LVDS_EN (U502.36---U201.32,U202.32)
GND
XTAL2
R520
4.7K
PWM1 (U601.M4---R528)
HDATAF0
RP505
330R(8P4R)
1
2
3
4
8
7
6
5
C511
0.1UF
R525
0R(op)
P2
CP501
1000P
1
5 6 8
4 3 27
GND
+5V
AUTO KEY
_IRQ SHEET 5.Gm5020
GND
ON/OFF
R530
1K(NC)