ViewSonic VX712, Service Manual

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ViewSonic Corporation
Confidential - Do Not Copy
VX712
AIC1084-33PM (U101) : DC power convert, used to 5v convert 3.3v.
RT9164(U102) : DC power convert, used to 5v convert 2.5v.
MTV512GMV64(U104) : The MTV512M micro-controller is an 8051 CPU core embedded
device especially tailored for flat panel display applications. It includes an 8051
CPU core, 768-byte SRAM, 4 channels of 6-bit ADC, 3 external
counters/timers, 6 channels of PWM DAC, VESA DDC interface, and a
64K-byte internal program Flash-ROM memory.
111 SCSB Serial control I/F chip select
56 RESET RESET putput for Micron
46 DDCSCL / TCON[0] / BBLU[1] DDC serial control I/F clock/TCON[0]/
TTL BBLU[1]
47 DDCSDA / TCON[1] / pWM1 /
BBLU[0]
DDC serial control I/F data input/out/
CON[1] / Pwm1/TTL BBLU[0]
126 DDCSCL2 / TCON[5] DDC serial control I/F clock /
TCON[5]
125 DDCSDA2 / TCON[7] / pWM1 DDC serial control I/F data
input/out/TCON[7] / pWM1
28 ADC_REFIO ADC band-gap voltage de-coupling
29 ADC_VDD Analog power(3.3v)
30 BLUE+ Analog input from BLUE channel
31 BLUE- Analog input ground from BLUE
channel
33 SOG / ADC_ TEST SOG in / ADC test pin
34 GREEN+ Analog input from GREEN channel
35 GREEN- Analog input ground from GREEN
channel
36 ADCB_VDD Analog power(3.3V)
37 RED+ Analog input from RED channel
38 RED- Analog input ground from RED
channel
41 ADC_VDD Analog power(3.3V)
42 AHS Analog HS input
43 AVS Analog VS input
49
、
121 3.3V Power VCCIO: 2
58 、 71 、
83
、
95
、
110
3.3V Power PVCC: 5
45
、
69
、
98
、
127
2.5V Power VCCK: 4