BenQ Q7T3-FP737S User manual

Q7T3-FP737S Dual function LCD Monitor Service Guide
Alignment Procedure
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1. Alignment procedure (for function adjustment)
A. Preparation:
1. Setup input timing ICL-605, 32-Grays pattern.
2. Setup unit and keep it warm up at least 30 minutes.
B. Timing adjustment:
1. Enter factory setting area (press “ENTER”, “EXIT” and then press “SOFTPOWER”).
2. Check the settings to following values:
Contrast = 50
Brightness = 90
Volume = 30
OSD time = 20
Color = sRGB
Language = English
Then, turn off the monitor power.
3. Turn on power enter user area.
C. Color balance adjustment:
1. Enter factory setting area (press “ENTER”, “EXIT” and then press “SOFTPOWER”).
2. Setup input timing ICL-605 (1280*1024 75Hz), 5-MOSAIC pattern.(timing 202 pattern 42)
3. Press”I-key”,to enter window for whitebalance and burning mode.
4. Press “Whitebalance”, to Calibrate ADC.
5. Setup input timing ICL-605, 32 -Gray pattern.
6. Checking if the picture is no good, reject this monitor.
D. Color adjustment:
1. Setup input timing ICL-605, white pattern.
2. Measure color temperature by Minolta CA-110 (or equivalent equipment).
3. Alignment the color temperature Bluish, Reddish & sRGB. The color temperature
specification as follows:
X+- 0.283+(-) 0.03White Balance
(Bluish, 9300K set on OSD) Y+- 0.297+(-) 0.03
X+- 0. 326+(-) 0.03White Balance
(Reddish, 5800K set on OSD) Y+- 0. 342+(-) 0.03
X+- 0. 313+(-) 0.03White Balance
(sRGB, 6500K set on OSD) Y+- 0. 329 +(-) 0.03

Q7T3-FP737S Dual function LCD Monitor Service Guide
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4. Turns off the monitor power.
E. Writing EDID file:
1. Setup a PC with DDC card.
2. Connect PC to monitor with a D-sub signal cable.
3. Please refer to the C212 for the correct EDID file.
4. Runs the writing program to write the EDID file into EEPROM for analog input, ie. 15-pin
D-sub.
5. Read both EEPROM data and confirm it to match with the C212 document definition.
6. Connect PC to monitor with a DVI-D signal cable.
7. Please refer to the C212 for the correct EDID file.
8. Runs the writing program to write the EDID file into EEPROM for DVI input, ie. 24-pin
DVI-D.
9. Read both EEPROM data and confirm it to match with the C212 document definition.

Q7T3-FP737S Dual function LCD Monitor Service Guide
Alignment Procedure
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F. Command definition:
PC Host will send 0x7C IIC slave address and then following 4 bytes command
I2C Send Command Byte1 Byte2 Byte3 Byte4
Write Contrast CA 55 Data checksum
Write Brightness CA 56 Data checksum
Write Red Gain CA 57 Data checksum
Write Green Gain CA 58 Data checksum
Write Blue Gain CA 59 Data checksum
Read Contrast C3 55 XX checksum
Read Brightness C3 56 XX checksum
Read Red Gain C3 57 XX checksum
Read Green Gain C3 58 XX checksum
Read Blue Gain C3 59 XX checksum
Write C1 (Bluish) R-Gain Data to NVRAM AA 3C Data checksum
Write C1 (Bluish) G-Gain Data to NVRAM AA 3D Data checksum
Write C1 (Bluish) B-Gain Data to NVRAM AA 3E Data checksum
Write C2 (sRGB) R-Gain Data to NVRAM AA 4C Data checksum
Write C2 (sRGB) G-Gain Data to NVRAM AA 4D Data checksum
Write C2 (sRGB) B-Gain Data to NVRAM AA 4E Data checksum
Write C3 (Reddish) R-Gain Data to NVRAM AA 5C Data checksum
Write C3 (Reddish) G-Gain Data to NVRAM AA 5D Data checksum
Write C3 (Reddish) B-Gain Data to NVRAM AA 5E Data checksum
Write User R-Gain Data to NVRAM AA 6C Data checksum
Write User G-Gain Data to NVRAM AA 6D Data checksum
Write User B-Gain Data to NVRAM AA 6E Data checksum
Read C1 (Bluish) R-Gain data from NVRAM A3 3C XX checksum
Read C1 (Bluish) G-Gain data from NVRAM A3 3D XX checksum
Read C1 (Bluish) B-Gain data from NVRAM A3 3E XX checksum
Read C2 (sRGB) R-Gain data from NVRAM A3 4C XX checksum
Read C2 (sRGB) G-Gain data from NVRAM A3 4D XX checksum
Read C2 (sRGB) B-Gain data from NVRAM A3 4E XX checksum
Read C3 (Reddish) R-Gain data from NVRAM A3 5C XX checksum
Read C3 (Reddish) G-Gain data from NVRAM A3 5D XX checksum
Read C3 (Reddish) B-Gain data from NVRAM A3 5E XX checksum
Read User R-Gain data from NVRAM A3 6C XX checksum
Read User G-Gain data from NVRAM A3 6D XX checksum
Read User B-Gain data from NVRAM A3 6E XX checksum
Change Color Temperature to C1 (Bluish) CC 1 XX checksum
Change Color Temperature to C2 (sRGB) CC 2 XX checksum
Change Color Temperature to C3 (Reddish) CC 3 XX checksum
Change Color Temperature to User CC 4 XX checksum

Q7T3-FP737S Dual function LCD Monitor Service Guide
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User mode to factory mode 1A 5A XX checksum
Auto Color (Offset1, Offset2, Gain) 1B 5A XX checksum
Factory mode to User mode 1E 5A XX checksum
Clear user area data 1F 5A XX checksum
On burn in mode CE 1 XX checksum
Off burn in mode CE XX* XX checksum
Change Language Setting 66 0~7 XX checksum
*: Any value except 1 can off burn-in mode
Read EEPROM Bank-0 B0 Address XX checksum
Read EEPROM Bank-1 B1 Address XX checksum
Read EEPROM Bank-2 B2 Address XX checksum
Read EEPROM Bank-3 B3 Address XX checksum
Read EEPROM Bank-4 B4 Address XX checksum
Read EEPROM Bank-5 B5 Address XX checksum
Read EEPROM Bank-6 B6 Address XX checksum
Read EEPROM Bank-7 B7 Address XX checksum
Write EEPROM Bank-0 B8 Address Data checksum
Write EEPROM Bank-1 B9 Address Data checksum
Write EEPROM Bank-2 BA Address Data checksum
Write EEPROM Bank-3 BB Address Data checksum
Write EEPROM Bank-4 BC Address Data checksum
Write EEPROM Bank-5 BD Address Data checksum
Write EEPROM Bank-6 BE Address Data checksum
Write EEPROM Bank-7 BF Address Data checksum
Note A: Byte4(Checksum) = Byte1 + Byte2 + Byte3
Note B: Data = The value write to MCU
Note C: XX = don't care, any value(<=0xFF).
Note D: The Byte-2 definition of “Change Language Setting” is as below,
0=DE, 1=EN, 2=ES, 3=FR, 4=IT, 5=JA, 6=繁中, 7=簡中
When PC Host sends 0x7D command to MCU, MCU must return as following (2 bytes)
Return Code R-Byte1 R-Byte2
Checksum error code FC AA
N
ormal return code the above Byte3 (/data) FC
If normal return code is exact FCh FC CF
The Table is for alignment machine to read data from EEPROM to check if the alignment process and
write data are correct.

Q7T3-FP737S Dual function LCD Monitor Service Guide
Alignment Procedure
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Read EEPROM Contrast A3 92 XX checksum
Read EEPROM Brightness A3 93 XX checksum
Read EEPROM C/T Point A3 94 XX checksum
Read EEPROM OSD-Hpos A3 95 XX checksum
Read EEPROM OSD-Vpos A3 96 XX checksum
Read EEPROM Language A3 97 XX checksum
Read EEPROM OSD Timer A3 98 XX checksum
Read EEPROM Volume A3 99 XX checksum
Additional define for OEM model, for reference only.
Write sRGB Contrast CA 53 Data checksum
Write sRGB Brightness CA 54 Data checksum
Write Serial number byte 0~9 AA 0~9 XX checksum
Read Serial number byte 0~9 A3 0~9 XX checksum
Table 1.
Incoming display mode (Input timing)
Resolution Horizontal
Frequency
(KHz)
Vertical
Frequency
(Hz)
Dot Clock
Frequency
(MHz) Remark
*720x400 31.47(N) 70.08(P) 28.32 DOS
*800x600 46.86(P) 75.00(P) 49.50 VESA
*1024x768 48.36(N) 60.00(N) 65.00 VESA
*1024x768 60.02(P) 75.00(P) 78.75 VESA
*1152x870 68.68(N) 75.06(N)
100.00
*1152x900 71.81(N) 76.14(N) 108.00
*1280x1024 80.00(P) 75.00(P) 135.00 VESA
*1280x1024 81.18(N) 76.16(N) 135.09 SUN

Q7T3-FP737S Dual function LCD Monitor Service Guide
Alignment Procedure
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2. Dressing
A. Check the 4 springs and 5 spacers on the BKT
B. Connect 2 with 1 then connect to connector 3

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C. Fix DVI BD with spacers
D. Place I/F BD and SPS BD in the BKT
E. Screws on the interface & power board(toltal 10 screw)

Q7T3-FP737S Dual function LCD Monitor Service Guide
Alignment Procedure
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Q7T3-FP737S Dual function LCD Monitor Service Guide
Alignment Procedure
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F. Plastic fixture on the interface board and place D-sub cover
G. Screw D-SUB cover on the BKT:

Q7T3-FP737S Dual function LCD Monitor Service Guide
Alignment Procedure
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H. Two gaskets at the bottom of BKT
I. Taping LVDS FFC on the panel:

Q7T3-FP737S Dual function LCD Monitor Service Guide
Alignment Procedure
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J. Place BKT on the panel and fasten FFC with I/F BD
K. Place an iron cover and screw it on BKT

Q7T3-FP737S Dual function LCD Monitor Service Guide
Alignment Procedure
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L. Two screws on panel right side
M. Two screws on panel left side

Q7T3-FP737S Dual function LCD Monitor Service Guide
Alignment Procedure
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N. Paste aluminum tape on the backlight wire hole
O. Spring on control board and fix CTRL BD on BZL

Q7T3-FP737S Dual function LCD Monitor Service Guide
Alignment Procedure
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P. Contorl board 9pin wire dressing
Q. Screw up uppercase with 5 screw

Q7T3-FP737S Dual function LCD Monitor Service Guide
Alignment Procedure
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R. Screw column with uppercase with 2 screw

Q7T3-FP737S Dual function LCD Monitor Service Guide
Circuit Operation Theory
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I. Introduction:
The Q7T3-FP731-D is a 17” SXGA (1280x1024) , 262 K colors(R, G, B 6-bit data) TFT LCD
monitor with multi-media function. It’s an Dual (analog and digital) interface LCD monitor with a 15 pins
D-sub signal cable and a 24pins DVI-D cable . it’s compliant with VESA specification to offer a smart power
management and power saving function. It also offers OSD menu for users to control the adjustable items and
get some information about this monitor, and the best function is to offer users an easy method to set all
adjustable items well just by pressing one key, we called it “Auto key” which can auto adjusting all controlled
items. Q7T3-FP731-D also offer DDC2 function to meet VESA standard.
II. Block diagram
The Q7T3-FP731-D consists of a head and a stand (base). The head consists of a LCD module with 4
lamps, a power board (include AC/DC, DC/DC and inverter board), a control board and interface BD. The block
diagram is shown as below.
III. Circuit operation theory:
A.) HEAD:
A-1.) Interface board diagram:
Control board
Interface board
LCD module with 4 lamps (backlight)
AC power in
D-Sub DVI-D
Inverter
Power

Q7T3-FP737S Dual function LCD Monitor Service Guide
Circuit Operation Theory
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Mst 8131B
140MHz
Single Link
TMDS
MTV312M
64(AJ)
Clock
Generator
XGA
1280×1024
LCM
DVI-D
D-SUB
KeypadIIC
140MHz
ADC

Q7T3-FP737S Dual function LCD Monitor Service Guide
Circuit Operation Theory
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(a) Circuit operation theory:
A basic operation theory for the interface board is to convert input signal into digital RGB .
Analog RGB signal is converted to digital signal through ADC. DVI-D signal is converted
through TMDS receiver. The microprocessor Mst8131B receives video data and optimizes the
image automatically. It also supports input source selection, 16 color from a 64k palette bitmap
OSD, and keypad controlling. The output data are sent to LCD module.
(b) IC introduction:
1.) DDC (Display Data Channel) function: We use DDC IC to support DDC/2B function. DDC data is
stored in 24C04(EEPROM). Those data related to LCD monitor specification. PC can read them by
“SDA” and “SCL” serial communication for I2C communication for DDC2B.
2.) Mst8131B IC: There are A/D, Scaling, OSD, MCU functions in the Mst8131B IC. Scaling IC is
revolutionary scaling engine, capable of expanding any source resolution to a highly uniform and
sharp image, combined with the critically proven integrated 8 bit triple-ADC and patented Rapid-lock
digital clock recovery system. It also support detect mode and DPMS control. MCU control unit, it
controls all the functions of this interface board, just like the OSD display setting, the adjustable items,
adjusted data storage, the external IIC communication, support DDC2B.
3.) EEPROM: We use 24C04 to store all the adjustable data and user settings.
And use 24C02 to store DVI EDID data.
4.) MTV312M64: To stored the source code which is accessed by MCU to run program.

Q7T3-FP737S Dual function LCD Monitor Service Guide
Circuit Operation Theory
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A-2.) Power board diagram:
Fig.1
#1 EMI Filter
This circuit (fig. 2) is designed to inhibit electrical and magnetic interference for meeting FCC, VDE,
VCCI standard requirements.
Fig. 2
EMI Filter Rectifier and
filter
Isolation power
transformer
Rectifier and filter Audio Amp and
Pre-Amp
PWM controller Switching element
Feedback Isolation
Inverter circuit
Rectifier and filter
LDO regulator

Q7T3-FP737S Dual function LCD Monitor Service Guide
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#2 Rectifier and filter
AC Voltage (90-264V) is rectified and filtered by BD601, C605 (See Fig 3) and the DC Output voltage is 1.4*(AC input).
(See Fig.3)
Fig. 3