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3.) EEPROM: We use 24C16 to store all the adjustable data, user settings and use 24C02
to store D-SUB and DVI EDID data.
4.) Flash ROM: We use 2M bit flash to store the FW hex.
A-2) Control board introduction:
There are 6 keys for user's control which includes “Power”, “Menu”, “Right/Up”, “Left/Down”,
“Auto”, and “Input Source”. The following descriptions are the introduction of these keys.
(1) Power key: to turn/off power of monitor
(2) “Menu” key: to enter sub-menus or select items.
(3) “Up/Right” key: to select previous and to increase adjustment and Audio submenu hotkey
(4) “Down/Left” key: to select next and to decrease adjustment and Display mode submenu
hotkey
(5) “Auto” key: to perform auto adjustment
(6) LED: It indicates the DPMS status of this LCD monitor; green light means DPMS on
(Normal operating condition). Amber light means DPMS off (Power Saving).
A-3) Power board diagram:
EMI Filter
Rectifier and
filter
Isolation
power
transformer
Rectifier and
filter
DC to DC
circuit
PWM contrller
+ Switching
element
+5V regulator
output
Feedback
Isolation
