BELINEA 101710
Instrukcja Serwisowa

Belinea 101710 LCD Monitor Service Guide Chapter 1 Circuit Operation Theory
4.) Scaling IC: We use MX88L282 of Macronix and by its frame buffer function to process the digital RGB signals to maximum 75Hz refresh rate at 1280 by 1024 resolution(about 135MHz pixel rate), it also support a ratio expansion function to display a full screen when the resolution of input signals are less than 1280 by 1024. 5.) SDRAM: We use 3 pieces of 2M bytes SDRAM to be the frame buffer of the scaling IC to process maximum 1280 by 1024 resolution of 24 bits RGB data. 6.) MCU: We use Myson MTV112V to controls all the functions of this interface board, just like the mode detecting, OSD display setting, the adjustable items, adjusted data storage, DPMS control, the external RS232 communication and the scaling IC 7.) EEPROM: We use 24C04 to store all the adjustable data , and we divide it into two parts for the storage of factory settings and user settings. 8.) OSD IC: We use LSC3852 of Motorolla to do �On Screen Display� function. 9.) LVDS transmitter IC: We use two pieces of THC63LVDM83A of THine to transmit all the digital data to the LCD panel driver IC because this driver IC has two pieces of built-in THC63LVDM83A (LVDS receiver IC).

1.3.2 AC-DC board diagram

Switching Element Rectifier and Filter

Isolation Power Transformer

Rectifier and Filter

+12V(INV.)

EMI Filter

Rectifier and Filter

+5V-Fix

Feedback Isolation and Control Logic

USB(+5V)

Fig. 1

1.3.2.1 EMI Filter
This circuit (fig. 2) is designed to inhibit electric and magnetic interference for Meet FCC, VDE, VCCI standard requirements
C603 2200P 250V (Y1) C604 2200P 250V (Y1) L605 92U L604 92U

AC Input ( 90--264)

C602 .1U 275v (X) C601 .1U 275v (X) 1 3

2 L603 UU-15

4

F601 T2AH 250V

R601 1M 1/2W

Fig. 2
4
Confidence and Property