Service manual

Belinea 101910
d) DVI(Digital) receiver :
The MST8131A chip has DVI interface. The digital signals are connected to MST8131A as
described below:
Pin Name Pin Number
DVI input channel + RED 40
DVI input channel - RED 41
DVI input channel + GREEN 43
DVI input channel - GREEN 44
DVI input channel + BLUE 46
DVI input channel - BLUE 47
DVI input Clock Pair + 49
DVI input Clock Pair - 50
e) OSD
The MST8131A has a fully programmable, high-quality OSD controller. The on-chip
static RAM (256 different fonts at size of 12X18) stores the cell map and the cell
definitions.
f) Inverter Brightness control (PWM0) (Pin 73)
The MST8131A has one PWM output PWM0 (Pin73) to control Inverter Brightness
Range.
g) Panel LVDS interface (Pin 102~103, Pin106~113, Pin118~125, Pin128, Pin1)
The MST8131A driver interface is highly programmable. It supports LVDS port for
panel.
h) Audio volume control (PWM1) (Pin74)
The MST8131A has one PWM output PWM1 (Pin74) to control audio volume.
4.1.2 Micro controller……MTV312 (U5)
The MYSON MTV312 microcontroller serves as the system microcontroller. That is, it programs the
MST8131A and manages other devices in the system such as the keypad, the backlight, LED and
audio general purpose input/output pins.
Pin number Pin name Pin function
23 P1.5 Key-Sel/Auto
22 P1.4 Key-Menu
16 P6.2 Key-Left
21 P1.3 Key-Power on/off
41 P5.4 LED-Green
9 P6.3 Key-Right
25 P1.7 Key-Down
24 P1.6 Key-Up
29 P3.0/RXD/HSCL SCL-VGA/RxD (Debug)
MAXDATA Servicemanual 111908 Page 21
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