ViewSonic VP150M Service Manual - Page 56
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ViewSonic September 2000 - Version 1.0 TROUBLE SHOOTING TROUBLE READING DDC Start Analog DDC OK? Digital DDC OK ? C END Service Manual VP150m Support DDC2B 1. Analog cable OK ? 2. Check signal IC24 (SDA, SCL) 3. Check IIC protocol Support DDC2B N 1. Digital cable ? 2. Voltage of +5Vx OK ? 3. Check signal (IC04 to W06) 4. Is compliant protocol ? Confidential - Do Not Copy Page 55
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ViewSonic
September
2000
-
Version
1.0
Service
Manual
VP150m
TROUBLE
SHOOTING
TROUBLE
READING
DDC
Start
Analog
DDC
OK?
N
Digital
DDC
OK
?
C
END
Support
DDC2B
1.
Analog
cable
OK
?
2.
Check
signal
IC24
(SDA,
SCL)
3.
Check
IIC
protocol
Support
DDC2B
1.
Digital
cable
?
2.
Voltage
of
+5Vx
OK
?
3.
Check
signal
(IC04
to
W06)
4.
Is
compliant
protocol
?
Confidential
—
Do
Not
Copy
Page
55