![background image](http://html1.mh-extra.com/html/benq/q7t4-fp71g/q7t4-fp71g_service-manual_2734285003.webp)
Q7T4-FP71G LCD Monitor Service Guide
Alignment Procedure
3
Confidential
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
Byte1 Byte2 Byte3
Byte4
OK N.A. Remark
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
cksum
√
Write Green Gain to
MCU RAM
CA
58
Data cksum
√
Write Blue Gain to
MCU RAM
CA
59
Data cksum
√
Write data to MCU RAM and
update the related register to
refresh the screen immediately.
Don
’
t store data to EEPROM.
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
√
Base on current color index to
read back the right gain value.
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
√
Summary of Contents for Q7T4-FP71G
Page 9: ...Q7T4 FP71G LCD Monitor Service Guide Alignment Procedure 9 Confidential Add FFC...
Page 10: ...Q7T4 FP71G LCD Monitor Service Guide Alignment Procedure 10 Confidential Add Tape...
Page 14: ...Q7T4 FP71G LCD Monitor Service Guide Alignment Procedure 14 Confidential Add one tape...
Page 16: ...Q7T4 FP71G LCD Monitor Service Guide Alignment Procedure 16 Confidential Add one screw...
Page 17: ...Q7T4 FP71G LCD Monitor Service Guide Alignment Procedure 17 Confidential Add 5 screw...
Page 19: ...Q7T4 FP71G LCD Monitor Service Guide Alignment Procedure 19 Confidential Add 2 screw...
Page 21: ...Q7T4 FP71G LCD Monitor Service Guide Alignment Procedure 21 Confidential...
Page 22: ...Q7T4 FP71G LCD Monitor Service Guide Alignment Procedure 22 Confidential Add one tape...
Page 24: ...Q7T4 FP71G LCD Monitor Service Guide Alignment Procedure 24 Confidential Add 4 screw...
Page 25: ...Q7T4 FP71G LCD Monitor Service Guide Alignment Procedure 25 Confidential Add 1 screw...
Page 27: ...Q7T4 FP71G LCD Monitor Service Guide Alignment Procedure 27 Confidential Finished...
Page 28: ...Q7T4 FP71G LCD Monitor Service Guide Alignment Procedure 28 Confidential...
Page 29: ...Q7T4 FP71G LCD Monitor Service Guide Alignment Procedure 29 Confidential...
Page 65: ......