Acer P221W - Page 39

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2.) EEPROM:
We use 24C16 EEPROM to store monitor user data and user preset timings. There are
16 user timing modes are automatically saved in it. Each timing mode is allocated with 22
bytes of memory space for information such as Sync frequencies, polarities… etc. PC
can access the EEPROM data indirectly through the SDA and SCL channels of DVI and
D-sub (IIC communication). The digital and analog DDC data are stored in two 24C02s
EEPROM.
A-2.) Power board diagram:
Fig.1
EMI Filter
Rectifier and
filter
Isolation power
transformer
Rectifier and filter
PWM controller Switching element
Feedback Isolation
Inverter circuit
Rectifier and filter
LDO regulator