Buffalo FTD-W932HSR/WH User manual

19" LCD Color Monitor Buffalo FTD-W932HSR
1
Service
Service
Service
FTD-W932HSR/WH
FTD-W932HSR/BK
TABLE OF CONTENTS
Description Page Description Page
SAFETY NOTICE
ANY PERSON ATTEMPTING TO SERVICE THIS CHASSIS MUST FAMILIARIZE HIMSELF WITH THE CHASSIS
AND BE AWARE OF THE NECESSARY SAFETY PRECAUTIONS TO BE USED WHEN SERVICING
ELECTRONIC EQUIPMENT CONTAINING HIGH VOLTAGES.
Table Of Contents…………………………………………...1
Revision List………………………………………………....2
Important Safety Notice.…….........................……...... 3
1. Monitor Specification..............................…………........4
2. LCD Monitor Description…………………………….......5
3. Operation Instructions....................................…...........6
3.1. General Instructions...........................…....................6
3.2. Control Button…………………………….…...............6
3.3 Adjusting the Picture...........................…..............7
4. Input/Output Specification............……………............9
4.1. Input Signal Connector............………….................9
4.2. Factory Preset Display Modes......….................. 10
4.3. Panel Specification.....………………..................11
5. Block Diagram….........................................................13
5.1 Software Flow Chart………………………….……….13
5.2.Electrical Block Diagram…………………….......15
6. Schematic……………..............................................17
6.1 Main Board....……….............................................17
6.2 Power Board………………………………………....22
6.3 Key Board…………………...….……………………25
7. PCB Layout..………….............................................26
7.1. Main Board………................................................26
7.2. Power Board….....................................................28
7.3. Key Board….........................................................29
8. Maintainability………...............................................30
8.1.Equipments and Tools Requirement......................30
8.2.Trouble Shooting………........................................31
9. White-Balance, Luminance adjustment………..…...37
10. Monitor Exploded View…………………….…........39
11. BOM List…............................................................40
12. Different Parts List………………..…………………53
CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING

19" LCD Color Monitor Buffalo FTD-G932HSR
2
Revision List
Version Date Revision
History Customer Model TPV Model
FTD-W932HSR/WH T97HRHNJHTB1DN
A00 Oct.-11-08 Initial release
FTD-W932HSR/BK T9RMRHNJAWB2DN

19" LCD Color Monitor Buffalo FTD-W932HSR
3
Important Safety Notice
Proper service and repair is important to the safe, reliable operation of all AOC Company Equipment. The service
procedures recommended by AOC and described in this service manual are effective methods of performing service
operations. Some of these service operations require the use of tools specially designed for the purpose. The
special tools should be used when and as recommended.
It is important to note that this manual contains various CAUTIONS and NOTICES which should be carefully read in
order to minimize the risk of personal injury to service personnel. The possibility exists that improper service
methods may damage the equipment. It is also important to understand that these CAUTIONS and NOTICES ARE
NOT EXHAUSTIVE. AOC could not possibly know, evaluate and advise the service trade of all conceivable ways in
which service might be done or of the possible hazardous consequences of each way. Consequently, AOC has not
undertaken any such broad evaluation. Accordingly, a servicer who uses a service procedure or tool which is not
recommended by AOC must first satisfy himself thoroughly that neither his safety nor the safe operation of the
equipment will be jeopardized by the service method selected.
Hereafter throughout this manual, AOC Company will be referred to as AOC.
WARNING
Use of substitute replacement parts, which do not have the same, specified safety characteristics may create shock,
fire, or other hazards.
Under no circumstances should the original design be modified or altered without written permission from AOC.
AOC assumes no liability, express or implied, arising out of any unauthorized modification of design.
Servicer assumes all liability.
FOR PRODUCTS CONTAINING LASER:
DANGER-Invisible laser radiation when open AVOID DIRECT EXPOSURE TO BEAM.
CAUTION-Use of controls or adjustments or performance of procedures other than those specified herein may
result in hazardous radiation exposure.
CAUTION -The use of optical instruments with this product will increase eye hazard.
TO ENSURE THE CONTINUED RELIABILITY OF THIS PRODUCT, USE ONLY ORIGINAL MANUFACTURER'S
REPLACEMENT PARTS, WHICH ARE LISTED WITH THEIR PART NUMBERS IN THE PARTS LIST SECTION OF
THIS SERVICE MANUAL.
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.
-Protect the module from the ESD as it may damage the electronic circuit (C-MOS).
-Make certain that treatment person’s body is grounded through wristband.
-Do not leave the module in high temperature and in areas of high humidity for a long time.
-Avoid contact with water as it may a short circuit within the module.
-If the surface of panel becomes dirty, please wipe it off with a soft material. (Cleaning with a dirty or rough cloth may
damage the panel.)

19" LCD Color Monitor Buffalo FTD-W932HSR
4
1. Monitor Specification

19" LCD Color Monitor Buffalo FTD-W932HSR
5
2. LCD Monitor Description
The LCD Monitor will contain main board, power board, key board which house the flat panel control logic,
brightnesscontrollogicandDDC.
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 and inverter
)
Flat Panel and
CCFL backlight
Main Board RS232 Connector
For white balance
adjustment in
factory mode
HOST Computer
CCFT Drive.
AC-IN
100V~240V
Monitor Block Diagram
Key board

19" LCD Color Monitor Buffalo FTD-W932HSR
6
3. Operation Instructions
3.1 General Instructions
Press the power button to turn the monitor on or off. The 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

19" LCD Color Monitor Buffalo FTD-W932HSR
7
3.3 Adjusting the Picture
OSD Settings
•Press the MENU-button to activate the OSD window.
•Press+ or - to navigate through the functions. Once the desired function is highlighted, press the
MENU-button to activate it. If the function selected has a sub-menu, press or again to navigate through the
sub-menu functions. Once the desired function is highlighted, press MENU-button to activate it.
•Press+ or - to change the settings of the selected function. To exit and save, select the exit function. If you
want to adjust any other function, repeat steps 2-3.
•OSD Lock Function: To lock the OSD, press and hold the MENU button while the monitor is off and then
press power button to turn the monitor on. To un-lock the OSD - press and hold the MENU button while the
monitor is off and then press power button to turn the monitor on.
OSD functions

19" LCD Color Monitor Buffalo FTD-W932HSR
8

19" LCD Color Monitor Buffalo FTD-W932HSR
9
4. Input/Output Specification
4.1 Input Signal Connector
D-SUB
DVI

19" LCD Color Monitor Buffalo FTD-W932HSR
10
4.2 Factory Preset Display Modes

19" LCD Color Monitor Buffalo FTD-W932HSR
11
4.3. Panel Specification
4.3.1 General Feature
M190A1-L09 is a 19” wide TFT Liquid Crystal Display module with 4 CCFL Backlight unit and 30 pins
2ch-LVDS interface. This module supports 1440 x 900 WXGA+ mode and can display 16.7M colors. The
inverter module for Backlight is not built in.
FEATURES
- Super Wide viewing angle.
- Super High contrast ratio
- Super fast response time
- High color saturation
- WXGA+ (1440 x 900 pixels) resolution
- DE (Data Enable) only mode
- LVDS (Low Voltage Differential Signaling) interface
-RoHS Compliance
4.3.1 Genera specifications

19" LCD Color Monitor Buffalo FTD-W932HSR
12
4.3.2 Electrical Characteristics
TFT Module
Back-light
4.3.3 Optical Characteristics

19" LCD Color Monitor Buffalo FTD-W932HSR
13
5. Block Diagram
5.1 Software Flow Chart
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
15
Y
N
16
17
19
Y
N
18

19" LCD Color Monitor Buffalo FTD-W932HSR
14
REMARK:
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.
Scalar initializes.
10) In standby mode?
11) Update the lifetime of back light.
12) Check the analog port, are they’re 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
disappears.
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?

19" LCD Color Monitor Buffalo FTD-W932HSR
15
5.2 Electrical Block Diagram
Main Board
MCU
RTD 2120L
(U401)
Scalar IC RTD2525L
(Include ADC, OSD)
(U501)
EEPROM
M24C16-WMN6TP
(U403)
D-Sub
Connector
(CN301)
H sync
V sync
RGB
EPR_SDA
EPR_SCL
LCD Interface
(CN601)
Key Board
Control
(CN202)
Crystal
(X401)
24MHZ/30PF/49U
DVI
Connector
(CN302)
H sync
V sync
RGB

19" LCD Color Monitor Buffalo FTD-W932HSR
16
Power Board
EMI filter Bridge
Rectifier and
Filter
Start Circuit
R904, R932, R933
PWM
Control IC
Transformer
Feedback
circuit
Rectifier
Diodes
AC input
5V
12V
ON/OFF
Control
PWM
Control IC
Feedback
Circuit
OSC and
Output
DC
Convert
MOSFET
Q802, Q803
Over Voltage
protect
Lamp
ON/OFF
DIM
CN902

19" LCD Color Monitor Buffalo FTD-W932HSR
17
6. Schematic
6.1 Main Board
BKLT-VBRI
R201
200 OHM 1/16W
* BKLT-EN High ON(3.3V)
C204
0.1uF /16V
+
C202
Near to Connect
Q204
PMBS3906
Q202
PMBS3904
VCC3
CMVCC
CN201
CONN
1
2
3
4
5
6
7
8
9
BKLT-EN
ZD201
NC
1 2
KEY 1
VCC3
U201
AP1117E33LA
1
23
VSS
VOUTVIN
CMVCC
C210
0.1uF/ 16V
POWER_KEY # {4}
C209
0.1uF/16V
1
FTD-W932HS B
37Thursday , Nov em ber 08, 2007
715G2507-1-K <
称爹 >
03.POW ER
G2507-1-K-X-7-071109
OEM MODEL Size
Rev
Date Sheet of
TPV MODEL
PCB NAME
称爹
T P V ( Top Victory Electronics Co . , Ltd. )
Key Component
絬 隔 瓜 絪 腹
LED_G# {4}
CMVCC
CN202
CONN
1
2
3
4
5
6
Mut e
POWER_KEY #
'06-12-29-3 Change R207,R208 Value
from 470ohm to 120ohm
KEY0 {4}
+
C203
ZD203
NC
1 2
INV_ON# {4}
C205
0.1uF/ 16V
R208
120R 1/16W
LED_R
FB202
NC
ZD202
NC
1 2
Volume#
KEY1 {4}
C206
0.1uF/16V
R210 10K 1/16W
FB201
120OHM
VCC3
LED_R# {4}
R202
4K7 1/16W
LED_G
LED_G
C201
0.1uF/16V
R213 10K 1/16W
C_PAN EL_IND EX
KEY 0
MVC C
Mut e { 4}
PANEL_ID# {4}
BKLT-EN
LED_R
Volume# {4}
CMVCC
Q205
PMBS3906
DIM# {4}
R207
120R 1/16W

19" LCD Color Monitor Buffalo FTD-W932HSR
18
CBPC7HRTB1Q1 1
FTD-W932HS B
47Saturday , Nov ember 10, 2007
715G2507-1-K <
称爹 >
04.input
G2507-1-K-X-7-071109
OE M MO D EL Si ze
Rev
Date Sheet of
TPV MODEL
PCB NAME
称爹
T P V ( Top Victory Electronics Co . , Ltd. )
Key Component
絬 隔 瓜 絪 腹
GND POWER
D311
BAV99
3
1 2
R322 10R 1/16W 5%
DSUB_V
D313
UDZSNP5.6B
R316 10K 1/16W 5%
DDC1_SCL{4}
RX1N
12/29 change
ZD302 ZD303
from NC to
insert
HOT_PLUG
D301
BAV99
3
1 2
RTD_R-
R326
100K 1/16W 5%
CN302
JACK
1
2
3
4
5
6
7
8
25
28
9
10
11
12
13
14
15
16
26
29
17
18
19
20
21
22
23
24
27
32 31
DAT2-
DAT2+
2/4shield
DAT4-
DAT4+
DDC SCL
DDC SDA
VSYNC
R
HSYNC
DAT1-
DAT1+
1/3shield
DAT3-
DAT3+
+5V
SYNC GND
HPD
G
RGB GND
DAT0-
DAT0+
0/5shield
DAT5-
DAT5+
clk shield
clk+
clk-
B
GND GND
C310
5pF/50V
D306
BAV99
3
1 2
RXCP {5}
VGA_G-
R315 100R 1/16W 5%
RX0P
R311
100R 1/16W 5%
R318 10R 1/16W 5%
D308
BAV99
3
1 2
C303
33pF
C307
0.047uF
ZD304
UDZSNP5.6B
1 2
RX1P {5}
FB303
BEAD
1 2
D314
BAV99
3
1 2
VGA_B-
RX2N
R309 100R 1/16W 5%
R303 100R 1/16W 5%
CMVCC
ZD305
UD ZSNP5.6B
1 2
RX2P {5}
VGA_G+
VGA_B-
RX2N {5}
R305
2K2 1/16W 5%
DDC2_SCL {4}
VGA_B+
C305
5pF/50V
D302
BAV99
3
1 2
C306
0.047uF
RTD_G+
C308
5pF/50V
R313 100R 1/16W 5%
R310
75R 1/16W 5%
RX0N {5}
RTD_B+
FB302
BEAD
1 2
RTD_G-
RTD_R+ {5}
DSUB_5V
C302
33pF
R304
2K2 1/16W 5%
DGND
RX0N
D312
UD ZSNP5.6B
R323 10R 1/16W 5%
CMVCC
DSUB_V {4}
RXCN
DDC2_SDA
ZD302
UDZSNP5.6B
1 2
C311
0.047uF
RX0P {5}
C317
0.1uF/16V
C301
0.047uF
CN301
DB15
1
6
2
7
3
8
4
9
5
11
12
13
14
15
10
17 16
D315
UD ZSNP5.6B
R327
4K7 1/16W 5%
RXCN {5}
RTD_R- {5}
VGA_R+
ZD307
UDZSNP5.6B
1 2
RTD_R+
R302 0R05 1/16W
RTD_B- {5}
ZD301
UDZSNP5.6B
1 2
R312 100R 1/16W 5%
2007-02-06 add for EMI
DDC2_SDA {4}
D307
BAV99
3
1 2
R324 10R 1/16W 5%
RTD_G+ {5}
RX1P
R319 10R 1/16W 5%
D310
UDZSNP5.6B
R325 10R 1/16W 5%
ZD303
UDZSNP5.6B
1 2
FB304
150 OHM
RTD_V {5}
C316
0.1uF/16V
RX2P
HPD_CTL
DDC1_SCL
R321 10R 1/16W 5%
VGA_G+
DDC2_SCL
RTD_B-
VGA_R+
RTD_G- {5}
VGA_R+
C309
0.047uF
VGA_B+
R306 100R 1/16W 5%
R301 100R 1/16W 5%
DVI_5V
D304
BAV99
3
1 2
2007-02-06 add for EMI
VGA_G-
RTD_B+ {5}
DDC1_SDA
VGA_B+
C315
0.1uF/ 16V
R317 100R 1/16W 5%
Q301
NC
C304
0.047uF
RXCP
VGA_CON
VGA_G+
DSUB_H
R307
75R 1/16W 5%
FB301
BEAD
1 2
RX1N {5}
R308 100R 1/16W 5%
FB305
150 OHM
DDC1_SDA{4} VGA_R-
D303
BAV99
3
1 2
RTD_H {5}
R320 10R 1/16W 5%
D305
BAV99
3
1 2
DSUB_CONNECT {4}
R314
75R 1/16W 5%
DSUB_5V
DVII_DETECT {4} VGA_R-
D309
BAV99
3
1 2

19" LCD Color Monitor Buffalo FTD-W932HSR
19
R420 100R 1/16W
MCU_VCC_S
IICSCL
R425
10K 1/16W
R415
6K8 1/16W
MC U _V C C
CMVCC
DDC1_SDA
RTD2120L
U401
RTD2120L-LF
1
2
3
4
5
6 7
8
17 15
41 40 39 38 37 36 35 34 33
19
28
29
20
21
22
23
24
25
26
27
16
9
10
11
12
13
14
18
30
31
32
43 42
44
45
46
47
48
P5.5/PWM5
DSCL2/P5.6
DSDA2/P5.7
RST
ASCL1/P3.0/RXD
NC NC
ASDA1/P3.1/TXD
VSS XO
VCC
P1.0/T2
P1.1 P1.2 P1.3 P1.4 P1.5 P1.6 P1.7
NC
VSYNC
NC
P6.0/ADC0
P6.1/ADC1
P6.2/ADC2
P6.3/ADC3
P6.4
P6.5
P6.6/ CLKO1
P6.7
XI
P3.2/INT0
P3.3/INT1
P3.4/T0
P3.5/T1
P7.6/CLKO2
P7.7
NC
NC
NC
NC
NC NC
P5.0/PWM0
P5.1/PWM1
P5.2/PWM2
P5.3/PWM3
P5.4/PWM4
KEY1
R435 100R 1/16W
R406
4K7 1/16W 5%
R432 100R 1/16W
2007-01-11 ADD
MVC C
DVII_DETECT{3}
2
PANEL_ID#{2}
DDC1_SCL{3}
R405
4K7 1/16W 5%
R412
4K7 1/16W
C410
0.1uF /16V
R454
1K 1/16W
C403
0.1uF /16V
R427 NC
LED_R#{2}
DSUB_CONNECT {3}
PANEL_ID#
R438
10K 1/16W
R445 4K7 1/16W
R410 100R 1/16W 5%
Q401
PMBS3904
R453
1K 1/16W
R421
NC
U402
AZ431AN-AE1
IICSDA
R434 100R 1/16W
PPWR_ON#{6}
R440 22R 1/16W
R437
3.9K OHM 1/16W
RTD_SD3/SDI
R401
3.9K OHM 1/ 16W
R442 100R 1/16W
RTD_SCLK
R422 100R 1/16W
C404
0.22uF 16V
FB401
150 OHM
POWER_KEY# {2}
DDC2_SDA
DSUB_5V
MC U _V C C
DDC2_SCL{3}
KEY0
R416
10K 1/16W
1
FTD-W932HS B
57Thursday , Nov ember 08, 2007
715G2507-1-K <
称爹 >
05.MCU/RTD2120L
G2507-1-K-X-7-071109
OEM MODEL Size
Rev
Date Sheet of
TPV MODEL
PCB NAME
称爹
T P V ( Top Victory Electronics Co . , Ltd. )
Key Component
絬 隔 瓜 絪 腹
MC U _V C C
CMVCC
R431
6K8 1/16W
Closed to X'tal
MCU_VCC
HPD_CTL
{5}
LED_G#{2}
DSUB_V1
R443 4K7 1/16W
R429 0R 05 1/16W C RY STAR_OU T
'06-11-03
INV_ON#{2}
DSUB_V
MCU_VCC
C402
1uF 10V
MC U _V C C
KEY0 {2}
D402
BAV70
Mut e{2}
Volume#{2}
R4144K7 1/16W
VCC3
POWER _KEY #
MCU_VCC_S
R407
4K7 1/16W 5%
DSUB_V {3}
R403
3.9K OHM 1/ 16W
D403
LL4148
R444 4K7 1/16W
DVI_5V
DDC1_SCL
DDC2_SCL
C411
10pF
DDC2_SDA{3}
INV_ON#
BAT54C
R439
6K8 1/16W
IICSDA
R441 22R 1/16W
IICSCL
DDC1_SDA{3}
R419
NC
KEY1 {2}
LED_R#
R451
4K7 1/16W
MCU_VCC
R428 22R 1/16W
1
RTD_SCLK {5}
RTD_SD3/SDI {5}
MCU_RESET
C406
0.1uF /16V
2007-02-06 add for EMI
Closed to MCU
WP
R411
4K7 1/16W
LED_G#
R424 1K 1/16W
'06-11-03
R408 100R 1/16W 5%
DIM#{2}
PANEL_VCC
MCU_RESET
R404
10K 1/16W
CRYSTAR_OUT {5}
U403
M24 C 16
1
2
3
4 5
6
7
8
NC
NC
NC
VSS SDA
SCL
WC
VCC
3
R433 100R 1/16W
R4134K7 1/16W
MCU_VCC_S
Mut e
R402
1K 1/16W
R430 100R 1/16W
+
C405
10uF/50V
D401 is Reserve for
powerBoard CMVCC=3V
D401
NC
1
3
2
PPWR_ON#
Volume#
X4 0 1
24mhz
1 2
MCU_VCC_S
DSUB_CONNECT
DIM#
C409
NC
R436
10K 1/16W
R409 100R 1/16W 5%
+
C408
NC
C401
10pF
R426 22R 1/16W
R423 1K 1/16W
'06-11-24 D402 change
Value from BAT54 to
BAV70
WP
C412
1uF 10V
MCU_VCC_S

19" LCD Color Monitor Buffalo FTD-W932HSR
20
RXE3-
LVDS_O6
LVDS_E4
R602
330R 1/8W 5%
1
RXE0+
RXO3+
RXE0-
R604
47K 1/16W 5%
RXO3+
R605
4K7 1/16W 5%
PANEL_VCC
LVDS_E7
LVDS_O3
PANEL_VCC
Q602
PMBS3906
LVDS_O1
RXE2+
LVDS_O5
RXOC-
RXE1+
LVDS_E6
RXO0-
LVDS_O2
D
LVDS_O4
PPWR _ON#{4}
PANEL_VCC
RXE2-
R606
NC
LVDS_E8 RXE3+
LVDS_O7
C603
0.1uF/16V
+
C604
470uF/25V
R601
10K 1/16W 5%
PANEL_VCC
AO3401L
LVDS_E[0..9]{5}
LVDS_E1
RXE1-
LVDS_O8
RXO1-
RXEC-
FB601
120OHM
RXE2-
RXE1-
RXEC+
RXO0+
LVDS_E0
PPWR _ON#
G
LVDS_E5
RXO2-
RXE1+
RXE0+
LVDS_O0
RXO0+
RXOC- RXOC+
LVDS Panel ( FFC Type )
RXEC-
'07-01-04 Add R606(NC)
CMVCC
LVDS_O9
LVDS_O[0..9]{5}
RXO1+
LVDS_E9 RXE3+
C602
0.01uF/25V
RXE0-
LVDS_E3
RXO2+
2
3
RXO2-
S
RXE2+
CN601
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
Realtek Semiconductor Corp.
1
FTD-W932HS A
77Thursday , Nov ember 08, 2007
715G2507-1-K <
称爹 >
07.OUTPUT
G2507-1-K-X-7-071109
OEM MODEL Size
Rev
Date Sheet of
TPV MO D E L
PCB NAME
称爹
T P V ( Top Victory Electronics Co . , Ltd. )
Key Component
絬 隔 瓜 絪 腹
RXO3-
RXO1+
RXOC+
RXO0-
RXO1-
RXE3-
RXO2+
Q601
AO3401
LVDS_E2
RXEC+
RXO3-