Dell UltraSharp 2208WFP, Service Manual

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Service Manual
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- Differential Signal input RX0+,RX0-,RX1+,RX1-,RX2+,RX2-,RXC+,RXC- through CN201
#18,#17,#10,#9,#2,#1,#23,#24 via R206,R205,R204,R203,R202,R201,R207,R208 enter into U105
(RTD2545LH) Digital input terminal #4,#5,#2,#3,#47,#48,#6,#7, and then RTD2545LH deals with
signal internally. D206, D207, D204, D205, D202, D203, D208, D209 are ESD protector to prevent
U105 from ESD
- Signal DDC_SCL (series clock) inputs via CN201#6, and then passes through ZD204 Zener for ESD
protection, via R209, goes into EDID EEPROM IC U201 #6.
- Signal DDC_SDA (series data) inputs via CN201#7, and then passes through ZD203 Zener for
ESD protection, via R210, goes into EDID EEPROM IC U201 #5.
- CN201#15 is defined as cable detect pin, this detector realize passes through R216 ,go into U108#25,
and D210 is ESD protector.
- U201 +5V is supplied by PC via CN201#14 through D201, or supplied by Monitor self via D201.
- U201 is an EEPROM IC which is memory and DVI input EDID data saved in it.
2.3.3 Buttons Control