17
2.ABNORMAL VIDEO LEVEL ON SCREEN
CHECK 12V RELATIVE
CIRCUIT
OK
NG
OK
NG
NG
OK
OK
CHECK THE VOLTAGE OF IC801
CHECK THE SIGNAL INPUT OF R.G.B.
ABOUT 0.7Vpp
CHECK THE VIDEO OUTPUT OF IC801
R.G.B. APPROACH STANDARD
CHECK SIGNAL CABLE OR
INTERFACE CARD.
CONTRAST SET MAX.
OR IC401 PIN 16 OUTPUT
CHECK IC801 PIN 13 ABOUT 4V
PIN 6, 9, 22 ABOUT 12V
CHECK IC801 PIN 15 CLAMP PULSE
PIN 18, 20, 23 ABOUT 4Vpp,
CHECK THE IC105 RELATIVE CIRCUIT
PIN 16 BLANK PULSE
PIN 26, 27, 28 ABOUT 4V OR
CHECK Q801 AND RELATIVE CKT
3. ABNORMAL DDC (PLUG & PLAY)
OK
NG
CHECK IC101 PIN 5 VOLTAGE ABOUT 5V
CHECK SIGNAL CABLE
OR H802 PIN 3, 4 DATA OUTPUT
CHECK Q102 GOOD OR FAIL
CHECK THE VOLTAGE OF IC801
PIN7,15,18,21 ABOUT 12V
PIN 11 BLANK PULSE
CHECK THE VIDEO OUTPUT OF IC801
PIN 16,19,22 ABOUT
4VPP,CONTRAST SET MAX
/
