Acer X203H Service Manual page 59

Acer computer monitor user manual
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capable of expanding any source resolution to a highly uniform and sharp image or down
scaling from 1980x1020, combined with the critically proven integrated 8 bit triple-ADC
and patented Rapid-lock digital clock recovery system. It also support detect mode and
DPMS control.
3.) RTD2120L: Control unit, 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.) EEPROM: We use 24C016 to store all the adjustable data, user settings and HDCP Key
and use 2 of 24C02 to store DVI and D-SUB EDID data.
A-2.) Control board introduction :
There are 6 keys for user' s control which includes "Menu", "Right", "Left", "Auto",
"Empowering", and "Power". The following descriptions are the introduction of these keys.
(1) "Menu" key: to enter sub-menus or select items.
(2) "Right" key: to select previous and to increase adjustment
(3) "Left" key: to select next and to decrease adjustment
(4) "Auto" key: to perform auto adjustment and Exit key
(5) "Empowering": to Open the Acer eColor Management OSD and access the scenario
modes
(6) "Power" key: to turn/off power of monitor
(7) 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
PWM contrller
Isolation
power
transformer
Switching
element
Feedback
Isolation
Fig.1
- 59 -
Rectifier and
filter
Rectifier and
filter
Inverter circuit
Audio circuit
LDO regulator

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