Monitor LCDBenQ Q7T4SM[1], Schematy
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Q7T4-FP71G LCD Monitor Service Guide
Alignment Procedure
1. Alignment procedure (for function adjustment)
A. Preparation:
1. Setup input timing ICL-605( 1280x1024@75Hz ), 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
OSD time = 20
Color = Normal
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”, “I-Key” and then press “SOFTPOWER”).
2. Setup input timing ICL-605(1280x1024@75Hz), 32-Gray pattern (pattern 48) .
3. Press “I-KEY”, and than OSD will show “White Balance” item and than press “ENTER” button
to do auto color.
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Q7T4-FP71G LCD Monitor Service Guide
Alignment Procedure
D. Color adjustment:
1. Setup input timing ICL-605, white pattern .
2. Confirm auto color adjustment had already done.
3. Measure color temperature by Minolta CA-110 (or equivalent equipment).
4. Check the color temperature Bluish, Reddish & Normal. The color temperature specification
as follows:
White Balance
(Bluish, 9300K set on OSD)
X+-
0.283+(-) 0.03
Y+-
0.297+(-) 0.03
White Balance
(Reddish, 5800K set on OSD) Y+-
X+-
0. 326+(-) 0.03
0. 342+(-) 0.03
White Balance
(sRGB, 6500K set on OSD)
X+-
0.313+(-) 0.03
Y+-
0. 329 +(-) 0.03
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Q7T4-FP71G LCD Monitor Service Guide
Alignment Procedure
5. Setup input timing , 32 -Gray pattern.
To check if there are any abnormal display problems of preset timing modes .
Check the following preset timings with General pattern:
No.
Mode
H
V
1
720×400 @ 70Hz
31.468
70.8
2
640×480 @ 60Hz
31.469
59.940
3
640×480 @ 75Hz
37.500
75.000
4
800×600 @ 60Hz
37.879
60.317
5
800×600 @ 75Hz
46.875
75.000
6
1024×768 @ 60Hz
48.363
60.004
7
1024×768 @ 75Hz
60.023
75.029
8
1152x864 @ 75Hz
67.500
75.000
9
1280×1024 @ 60Hz
63.981
60.020
10
1280×1024 @ 75Hz
79.976
75.025
6. Checking if the picture is no good, reject this monitor.
7. To check the power consumption by disabling “burn-in mode” setting
8.
To clear user data and program complete DDC data to monitor by IIC bus communication.
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 .
5. Read EEPROM data and confirm it to match with the C212 document definition.
F. Command definition :
PC Host will send 0x7C IIC slave address and then following 4 bytes command
I2C Send Command
B
yte1
B
yte2
B
yte3
Byte4
OK N.A. Remark
Write Contrast to
MCU RAM
CA
55
Data cksum
√
Write Brightness to
MCU RAM
CA
56
Data cksum
√
Write data to MCU RAM and
update the related register to
refresh the screen immediately.
Don’t store data to EEPROM.
Write Red Gain to
MCU RAM
CA
57
Data cksum
√
Write Green Gain to
MCU RAM
CA
58
Data cksum
√
Write Blue Gain to
MCU RAM
CA
59
Data cksum
√
Read Contrast from MCU RAM
C3
55
XX cksum
√
Read Brightness from MCU RAM
C3
56
XX cksum
√
Read Red Gain from MCU RAM by color index C3
57
XX cksum
√
Read Green Gain from MCU RAM by color
index
C3
58
XX cksum
√
Base on current color index to
read back the right gain value.
Read Blue Gain from MCU RAM by color index C3
59
XX cksum
√
Write C1 (Bluish) R-Gain Data to EEPROM
AA
3C
Data cksum
√
Write C1 (Bluish) G-Gain Data to EEPROM
AA
3D
Data cksum
√
Write C1 (Bluish) B-Gain Data to EEPROM
AA
3E
Data cksum
√
Write C2 (sRGB) R-Gain Data to EEPROM
AA
4C
Data cksum
√
Write C2 (sRGB) G-Gain Data to EEPROM
AA
4D
Data cksum
√
Write C2 (sRGB) B-Gain Data to EEPROM
AA
4E
Data cksum
√
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Q7T4-FP71G LCD Monitor Service Guide
Alignment Procedure
Write C3 (Reddish) R-Gain Data to EEPROM
AA
5C
Data cksum
√
Write C3 (Reddish) G-Gain Data to EEPROM
AA
5D
Data cksum
√
Write C3 (Reddish) B-Gain Data to EEPROM
AA
5E
Data cksum
√
Write User R-Gain Data to EEPROM
AA
6C
Data cksum
√
Write User G-Gain Data to EEPROM
AA
6D
Data cksum
√
Write User B-Gain Data to EEPROM
AA
6E
Data cksum
√
Write Cx R-Gain Data to EEPROM
AA
7C
Data cksum
√
Write Cx G-Gain Data to EEPROM
AA
7D
Data cksum
√
Reserved for some model have
extra color temperature
Write Cx B-Gain Data to EEPROM
AA
7E
Data cksum
√
Write Contrast to EEPROM
AA
92
Data cksum
√
Write Brightness to EEPROM
AA
93
Data
cksum
√
1=C1/9300/Bluish,
2=C2/6500/sRGB/,
3=C3/5800/Reddish,
Write C/T index to EEPROM
AA
94
0~4 cksum
√
4=User, 5=Cx
Write OSD-Hpos to EEPROM
AA
95
Data cksum
√
Write OSD-Vpos to EEPROM
AA
96
Data cksum
√
0=DE, 1=EN, 2=ES, 3=FR,
4=IT, 5=JA, 6=
繁中
, 7=
簡中
Write Language to EEPROM
AA
97
0~7 cksum
√
(Also Update MCU RAM)
Write EEPROM OSD Timer
AA
98
Data cksum
√
Write EEPROM Volume
AA
99
Data cksum
√
Write EEPROM Gamma index
AA
9A
Data cksum
√
For model with Gamma curve
selection function
Write OSD Transparency to EEPROM
AA
9E
Data cksum
√
Write OSD Rotation to EEPROM
AA
9F
Data cksum
√
Read C1 (Bluish) R-Gain data from EEPROM
A3
3C
XX cksum
√
Read C1 (Bluish) G-Gain data from EEPROM
A3
3D
XX cksum
√
Read C1 (Bluish) B-Gain data from EEPROM
A3
3E
XX cksum
√
Read C2 (sRGB) R-Gain data from EEPROM
A3
4C
XX cksum
√
Read C2 (sRGB) G-Gain data from EEPROM
A3
4D
XX cksum
√
Read C2 (sRGB) B-Gain data from EEPROM
A3
4E
XX cksum
√
Read C3 (Reddish) R-Gain data from EEPROM A3
5C
XX cksum
√
Read C3 (Reddish) G-Gain data from EEPROM A3
5D
XX cksum
√
Read C3 (Reddish) B-Gain data from EEPROM A3
5E
XX cksum
√
Read User R-Gain data from EEPROM
A3
6C
XX cksum
√
Read User G-Gain data from EEPROM
A3
6D
XX cksum
√
Read User B-Gain data from EEPROM
A3
6E
XX cksum
√
Read Cx R-Gain data from EEPROM
A3
7C
XX cksum
√
Read Cx G-Gain data from EEPROM
A3
7D
XX cksum
√
Reserved for some model have
extra color temperature
Read Cx B-Gain data from EEPROM
A3
7E
XX cksum
√
Read Contrast from EEPROM
A3
92
XX cksum
√
Read Brightness from EEPROM
A3
93
XX cksum
√
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Q7T4-FP71G LCD Monitor Service Guide
Al
ignment Procedure
1=C1/9300/Bluish,
2=C2/6500/sRGB/,
Read C/T index from EEPROM
A3
94
XX cksum
√
3=C3/5800/Reddish,
4=User, 5=Cx
Read OSD-Hpos EEPROM
A3
95
XX cksum
√
Read OSD-Vpos from EEPROM
A3
96
XX cksum
√
Read Language from EEPROM
A3
97
XX cksum
√
0=DE, 1=EN, 2=ES, 3=FR,
4=IT, 5=JA, 6=
繁中
, 7=
簡中
Read OSD Timer from EEPROM
A3
98
XX
cksum
√
Read Volume from EEPROM
A3
99
XX
cksum
√
Read Gamma index from EEPROM
A3
9A
XX cksum
√
For model with Gamma curve
selection function
Read OSD Transparency from EEPROM
A3
9E
XX cksum
√
Read OSD Rotation from EEPROM
A3
9F
XX cksum
√
Change Color Temp. to
C1/9300K/Bluish
CC
01
XX cksum
√
Change Color Temp. to
C2/6500K/sRGB
CC
02
XX cksum
√
Change Color Temp. to
C3/5800K/Reddish
CC
03
XX cksum
√
Change C/T immediately.
And
store C/T index to EEPROM.
Change Color Temp. to
User
CC
04
XX cksum
√
Change Color Temp. to
Cx
CC
05
XX cksum
√
Reserved
Change Input Source to
D-Sub
CD
01
XX cksum
√
Change Input Source to
DVI
CD
02
XX cksum
√
On burn in mode
CE
01
XX cksum
√
Store data to EEPROM
Off burn in mode
CE
XX*
XX cksum
√
XX* = Non “1” value
Store data to EEPROM
Monitor is forced power saving
CF
01
XX cksum
√
Monitor wake up from power saving
CF
XX*
XX cksum
√
XX* = Non “1” value
User mode to factory mode
1A
5A
XX cksum
√
Auto Color (Offset1, Offset2, Gain)
1B
5A
XX cksum
√
Copy EDID Serial number to EEPROM
1C
5A
XX cksum
√
For specified “Industry
Customer” model.
Factory mode to User mode
1E 5A
XX cksum
√
Clear user mode and factory recall
1F 5A
XX cksum
√
Store data to EEPROM
Write EDID data to MCU DDC RAM
55 NA
NA
NA
√
For MTV312 MCU type
Copy DDC RAM data to EEPROM
BB NA
NA
NA
√
For MTV312 MCU type
Drive WP pin to low to enable write DDC IC
55 NA
NA
NA
√
For stand alone DDC IC
Drive WP pin to high to disenable write function BB NA NA
NA
√
For stand alone DDC IC
EEPROM Bank R/W (For Debug using only, not for Production Line Write EEPROM directly)
Read EEPROM Bank 0
B0
Address
XX cksum
√
Read EEPROM Bank 1
B1
Address
XX cksum
√
Read EEPROM Bank 2
B2
Address
XX cksum
√
(For 24C08 type)
Read EEPROM Bank 3
B3
Address
XX cksum
√
(For 24C08 type)
Write EEPROM Bank 0
B8
Address
Data cksum
√
Write EEPROM Bank 1
B9
Address
Data cksum
√
Write EEPROM Bank 2
BA
Address
Data cksum
√
(For 24C08 type)
Write EEPROM Bank 3
BB
Address
Data cksum
√
(For 24C08 type)
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