ViewSonic E70-3 Service Manual page 26

E70-3 Service Manual
9-8. NO DDC1/DDC2B
®
MUST POWER
ON/OFF
ONE TIME
CHECK DDC2B
READ 1C101 DATA
COMPARE READING
DATA WITH INITIAL
DATA
RE DOWN LOAD
CHECK DDC1
READ 1C101 DATA
NO
CHECK IC 102
DATA
NO
OK
RESET ©
CHECK 10102
DATA
10101
FAILURE
CHECK M401
SDA,SCL NO ne
1€102 OR DDC1/2B CARD 1C102 OR DDC1/2B CARD
FAILURE FAILURE
9-9. NO OSD FUNCTION
PRESS KEY
CHECK iC902
PINS = 5V
CHECK
P903 PIN1
YES
CHECK IC902 CHECK
PINS H-PULSE P3805 PINS
YES
CHECK IC902
PIN10 V-PULSE
YES
CHECK 1C902
PIN13,14,15
CHECK
1C902 PIN7,8
YES
CHECK IC901 CHECK
PIN2,3,4 1C901 PIN4
NO
1901 FAILURE