Diamond View DV172, Service Manual

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DV172 LCD Monitor Service Guide
Alignment procedure
3
2. Enter factory mode (press “EXIT” & “ENTER” at the same time, then press “power” button to turn on monitor).
3. Confirm auto color balance adjustment had already been done.
4. Measure each color temperature (C1, C2 & C3) by Minolta CA-110 (or equivalent equipment).
5. Two methods can be used to adjust RED, GREEN, BLUE value of each color temperature, C1, C2 & C3 to meet
following spec requirement, the 1
st
method is by using external PC and IIC alignment protocol to do automatic
adjustment, and the 2
nd
method is by manually and must be in factory mode.
X+- 0.283+(-) 0.03 Color temperature
(C1, 9300K set on OSD)
Y+- 0.297+(-) 0.03
X+- 0.313+(-) 0.03 Color temperature
(C2, 6500K set on OSD)
Y+- 0.329+(-) 0.03
X+- 0.326+(-) 0.03 Color temperature
(C3, 5800K set on OSD)
Y+- 0.342+(-) 0.03
6. Turns off the monitor power.
E. Writing EDID file: (Analog and DVI-D both)
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.
5. Read both EEPROM data and confirm if it’s matched with the C212 definition.
6. Repeat the above step 1 to step 5 with DVI-D signal cable connected.
F. Command definition for Auto Alignment:
1. PC Host will send 0x7C IIC slave address and then following 4 bytes command
I2C Send Command Byte1 Byte2 Byte3 Byte4
Change Color Temperature to C1 CC 1 XX checksum
Change Color Temperature to C2 CC 2 XX checksum
Change Color Temperature to C3 CC 3 XX checksum
Change C/T to User CC 4 XX checksum
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
Off burn in mode CE 2 XX checksum
Change language setting 66 0~5 XX 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
2. 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
Normal return code the above Byte3 (/data) FC
If normal return code is exact FCh FC CF