BenQ Q7T4-FP71G User manual

Q7T4-FP71G LCD Monitor Service Guide Alignment Procedure
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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.

Q7T4-FP71G LCD Monitor Service Guide Alignment Procedure
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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+(-) 0.03White 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

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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 √

Q7T4-FP71G LCD Monitor Service Guide Alignment Procedure
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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 √
Reserved for some model have
extra color temperature
Write Contrast to EEPROM AA 92 Data cksum √
Write Brightness to EEPROM AA 93 Data cksum √
Write C/T index to EEPROM AA 94 0~4 cksum √
1=C1/9300/Bluish,
2=C2/6500/sRGB/,
3=C3/5800/Reddish,
4=User, 5=Cx
Write OSD-Hpos to EEPROM AA 95 Data cksum √
Write OSD-Vpos to EEPROM AA 96 Data cksum √
Write Language to EEPROM AA 97 0~7 cksum √
0=DE, 1=EN, 2=ES, 3=FR,
4=IT, 5=JA, 6=繁中, 7=簡中
(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 √
Read Cx B-Gain data from EEPROM A3 7E XX cksum √
Reserved for some model have
extra color temperature
Read Contrast from EEPROM A3 92 XX cksum √
Read Brightness from EEPROM A3 93 XX cksum √

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Read C/T index from EEPROM A3 94 XX cksum √
1=C1/9300/Bluish,
2=C2/6500/sRGB/,
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 Color Temp. to User CC 04 XX cksum √
Change C/T immediately.
A
nd
store C/T index to EEPROM.
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)

Q7T4-FP71G LCD Monitor Service Guide Alignment Procedure
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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
N
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
Assembly panel and main BKT

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Add 4 screw between panel and main BKT

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Add FFC

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Add Tape

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Assembly IF board and Power Board

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Assembly PCB module and main BKT

Q7T4-FP71G LCD Monitor Service Guide Alignment Procedure
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Assembly IF board and FFC

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Add one tape

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Assembly lamp wire and Power Board

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Add one screw

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Add 5 screw

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Assembly main shielding and main BKT

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Add 2 screw

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Assembly control board wire and IF board