Service manual

SERVICE MANUAL LS07 chassis
7
7 U19 NTMS10P02 MOS switch
8 U23 LM2596-5.0 Liner voltage IC
9 U1 24LC21A EEPROM(save display parameter information)
10 U4 24LC32A EEPROMsave user control information
11 U6U20 PI5V330A Video switch
Two The function introduction of main IC
1. MST518 high integration chip
MST518 is a high performancehigh integration image processor which is
designed for LCD, it can support SXGA format(1280*1024).it integrates a group
of AD converter high quality format transform systemOSD generatoroutput
clock generatormultiple format output display interface(support TTLLVDS
RSDS)
MST518 feature:
Have high quality Expand tranform and compress transform, can output XGA
format signal
 Integrated LVDS circuit inside
 8 bit high quality ADC inside
 Double VGA input, Software switch
 Support ITU-656 format signal input
 Support H/V synccomposite syncgreen composite sync input, and
detect automaticlly by itself
 Programmable 10 bit Gamma correct, the brightness and contrast is
adjustable
 8 color256 Character OSD
 Built-in DDC circuit inside
 Low standby power
 Support TTLdouble LVDS signal output, Software switch
MST518 pin function:
And CPU interface
Pin Pin name Pin function
33
HWRESET
Hardware resethigh voltage enable
82
CS
Chip select signal of three-wire serial bus
83
SDA
data signal of three-wire serial bus
84
SCL
clock signal of three-wire serial bus
85
INT
interrupt
98-91
AD [7:0]
Parallel busthe chassis is not used
125
BUSTYPE
Bus type select
Analog Interface
38
HSYNC0
Analog Horizontal sync signal input channel 0
39
VSYNC0
Analog vertical sync signal input channel 0