1.ABNORMAL VIDEO LEVEL ON SCREEN
OK
NG
OK
NG
NG
OK
OK
CHECK THE VOLTAGE OF IC801
CHECK THE SIGNAL INPUT OF
ABOUT 0.7Vpp
CHECK THE VIDEO OUTPUT OF
R.G.B. APPROACH
CHECK SIGNAL CABLE
INTERFACE CARD.
CONTRAST SET
PIN 10 ABOUT 5V
CHECK 5V RELATIVE
CHECK THE IC801 PIN
RELATIVE CIRCUIT
RELATIVE CIRCUIT
CHECK IC801 PIN 23 CLAMP
PIN 19, 20, 21 ABOUT
CHECK IC801 PIN 5/PIN 6/PIN 7 & PIN
2. ABNORMAL DDC (PLUG & PLAY)
OK
NG
CHECK IC101 PIN 5 VOLTAGE ABOUT 5V
CHECK SIGNAL CABLE
CHECK Q921 GOOD OR FAIL
OR H802 PIN 2, 3 DATA OUTPUT
CHECK IC101 PIN 5 VOLTAGE ABOUT
5V
OUTPUT
ViewSonic Corporation
Confidential – Do Not Copy
E70f-5_E70fB-5_E70fSB-5
17
