DV154/154B LCD Monitor Service Guide
Circuit operation theory
3
DDC data is store in 24C04(EEPROM). When MCU working, it will read DDC data from 24C04
then put those data to DDC RAM of MTV312. Those data related to LCD monitor specification.
PC can read them by “SDA” and “SCL” serial communication for I
²
C communication for DDC2B.
2.) Sync Inverter: we use to tune the PC H-sync and the PC V-sync from PC. H-sync will effect
performance of phase.
3.) Scaling IC: We use MASCOT VZ of MRT .The MASCOT VZ is revolutionary scaling engine,
capable of expanding any source resolution to a highly uniform and sharp image or down scaling
form XSGA, 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.
4.) MCU: We use MTV312 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 DDC2B.
5.) EEPROM: We use 24C04 to store all the adjustable data except zoom on/off control, and we
divided it into two parts for the storage of DDC data and user settings.
A-2.) Power board digram:
E M I f ilte r
B r id g e R e c tif ie r
a n d
B u lk f ilte r
I s o la tio n p o w e r
T r a n s f o r m e r
R e c tif ie r a n d
f ilte r
R e c tif ie r a n d
f ilte r
R e c tif ie r a n d
f ilte r
I n v e r te r c ir c u u it
A u d io
A m p lif ie r
c ir c u it
M C U p o w e r
a n d f e e d b a c k
c o n tr o l
S w itc h
c o m p o n e n ts
P W M c o n tr o le r
F e e d b a k
I s o la to r
Fig.1
#1 EMI Filter
This circuit (fig. 2) is designed to inhibit electrical and magnetic interference for meeting FCC, VDE,
VCCI standard requirements.
Содержание DV154
Страница 28: ...DV154 154B LCD Monitor Service Guide Alignment Procedure E Add a gasket for TCO99 ...
Страница 37: ......
Страница 38: ......
Страница 46: ......
Страница 48: ......