BenQ Q7T4SM Service Manual
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:
Then, turn off the monitor power.
3. Turn on power enter user area.
C. Color balance adjustment:
Contrast = 50
Brightness = 90
OSD time = 20
Color = Normal
Language = English
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:
X+- 0.283+(-) 0.03 White Balance
(Bluish, 9300K set on OSD)
Y+- 0.297+(-) 0.03
X+- 0. 326+(-) 0.03 White Balance
(Reddish, 5800K set on OSD)
Y+- 0. 342+(-) 0.03
X+- 0.313+(-) 0.03 White Balance
(sRGB, 6500K set on OSD)
Y+- 0. 329 +(-) 0.03
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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
Write Contrast to MCU RAM CA 55 Data cksum
Write Brightness to MCU RAM CA 56 Data cksum
Write Red Gain to MCU RAM CA 57 Data
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
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
Byte1 Byte2 Byte3
Byte4
cksum
OK N.A. Remark
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Write data to MCU RAM and
update the related register to
refresh the screen immediately.
Don’t store data to EEPROM.
Base on current color index to
read back the right gain value.
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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
Write Cx B-Gain Data to EEPROM AA 7E Data cksum
Write Contrast to EEPROM AA 92 Data
Write Brightness to EEPROM
Write C/T index to EEPROM
Write OSD-Hpos to EEPROM
Write OSD-Vpos to EEPROM AA 96 Data
AA
AA
AA
93 Data
94 0~4
95 Data
cksum
cksum
cksum
cksum
cksum
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Alignment Procedure
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Reserved for some model have
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extra color temperature
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1=C1/9300/Bluish,
2=C2/6500/sRGB/,
3=C3/5800/Reddish,
4=User, 5=Cx
Write Language to EEPROM
Write EEPROM OSD Timer
Write EEPROM Volume
Write EEPROM Gamma index AA 9A Data
Write OSD Transparency to EEPROM
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
Read Cx B-Gain data from EEPROM A3 7E XX cksum
Read Contrast from EEPROM A3 92 XX
Read Brightness from EEPROM A3 93 XX
AA
AA
AA
AA
97 0~7
98 Data
99 Data
9E Data cksum
cksum
cksum
cksum
cksum
cksum
cksum
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0=DE, 1=EN, 2=ES, 3=FR,
4=IT, 5=JA, 6=繁中, 7=簡中
(Also Update MCU RAM)
For model with Gamma curve
selection function
√
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Reserved for some model have
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extra color temperature
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And
Alignment Procedure
1=C1/9300/Bluish,
2=C2/6500/sRGB/,
3=C3/5800/Reddish,
4=User, 5=Cx
Read C/T index from EEPROM A3 94 XX
Read OSD-Hpos EEPROM A3 95 XX
Read OSD-Vpos from EEPROM A3 96 XX
Read Language from EEPROM A3 97 XX
Read OSD Timer from EEPROM A3 98 XX
Read Volume from EEPROM A3 99 XX
Read Gamma index from EEPROM A3 9A XX
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 Color Temp. to User CC 04 XX cksum
Change Color Temp. to Cx CC 05 XX cksum
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
Off burn in mode CE XX* XX cksum
Monitor is forced power saving CF 01 XX cksum
Monitor wake up from power saving CF XX* XX cksum
User mode to factory mode 1A 5A XX cksum
Auto Color (Offset1, Offset2, Gain) 1B 5A XX cksum
Copy EDID Serial number to EEPROM
Factory mode to User mode 1E 5A XX cksum
Clear user mode and factory recall 1F 5A XX cksum
Write EDID data to MCU DDC RAM
Copy DDC RAM data to EEPROM
Drive WP pin to low to enable write DDC IC
Drive WP pin to high to disenable write function
1C 5A XX cksum
55 NA NA NA
BB NA NA NA
55 NA NA NA
BB NA NA NA
cksum
cksum
cksum
cksum
cksum
cksum
cksum
EEPROM Bank R/W (For Debug using only, not for Production Line Write EEPROM directly)
Read EEPROM Bank 0 B0
Read EEPROM Bank 1 B1
Read EEPROM Bank 2 B2
Read EEPROM Bank 3 B3
Write EEPROM Bank 0 B8
Write EEPROM Bank 1 B9
Write EEPROM Bank 2 BA
Write EEPROM Bank 3 BB
Address
Address
Address
Address
Address
Address
Address
Address
XX cksum
XX cksum
XX cksum
XX cksum
Data cksum
Data cksum
Data cksum
Data cksum
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0=DE, 1=EN, 2=ES, 3=FR,
4=IT, 5=JA, 6=繁中, 7=簡中
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For model with Gamma curve
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selection function
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Change C/T immediately.
store C/T index to EEPROM.
Reserved
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Store data to EEPROM
XX* = Non “1” value
Store data to EEPROM
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XX* = Non “1” value
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For specified “Industry
Customer” model.
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Store data to EEPROM
For MTV312 MCU type
For MTV312 MCU type
For stand alone DDC IC
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For stand alone DDC IC
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(For 24C08 type)
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(For 24C08 type)
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(For 24C08 type)
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(For 24C08 type)
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N
Alignment Procedure
Note A: Byte4 (cksum) = Byte1 + Byte2 + Byte3
Note B: Data = The value write to MCU or EEPROM
Note C: XX = don't care, any value (<=0xFF).
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
ormal return code the above Byte3 (/data) FC
If normal return code is exact FCh FC CF
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4. Wire Dressing and assembling concern
Prepare 1 panel
Alignment Procedure
Assembly panel and main BKT
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Alignment Procedure
Add 4 screw between panel and main BKT
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Alignment Procedure
Add FFC
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Alignment Procedure
Add Tape
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Alignment Procedure
Assembly IF board and Power Board
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Alignment Procedure
Assembly PCB module and main BKT
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Alignment Procedure
Assembly IF board and FFC
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Alignment Procedure
Add one tape
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Alignment Procedure
Assembly lamp wire and Power Board
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Alignment Procedure
Add one screw
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Alignment Procedure
Add 5 screw
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Alignment Procedure
Assembly main shielding and main BKT
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Alignment Procedure
Add 2 screw
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Alignment Procedure
Assembly control board wire and IF board
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