BenQ G2220HD - Power Board Diagram; DDC (Display Data Channel) Function; EMI Filter

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(3) Serial Flash: It controls all the functions of this interface board, just like the OSD display
setting, the adjustable items, adjusted data storage, the external IIC communication, support
DDC2BI.
(4) DDC (Display Data Channel) function: We use DDC IC to support DDC2BI function and
connected to analog SDA/SCL for analog DDC data. DDC data is store in 24C02(EEPROM).
Those data related to LCD monitor specification. PC can read them by “SDA” and “SCL”
serial communication for I²C communication for DDC2Bi.
A-2.) Power board diagram:
Fig.1
#1 EMI Filter
This circuit (fig. 2) is designed to inhibit electrical and magnetic interference for meeting FCC,
VDE, VCCI standard requirements.
C601
0.22U M
t
TR601
NTC 5
2 1
L3
N2
C603
2200PF
C602
0.22U M
C604
2200PF
L602
19MH
1
2
4
3
N3
L4
Fig. 2