Denon AVR-X7200W Service Manual page 103

A
Extend DIGITAL UNIT using a jig
Check power supply voltage.
AUDIO/VIDEO PCB
V +3.3V：
V -5V：
(See 102 page)
YES
Check the I2C control signsl of video selector IC
(U3703)
CONNECT-2 PCB
I2C(SCL)：
I2C(SDA)：
see sample waveform
YES
Check the input signal to video selector IC (U3703)
V：
Component-Y：
Component-Cb：
Component-Cr：
YES
Check the output signsl from video selector IC (U3703)
V (to Monitor out)：
V (to Z2 Monitor out)：
V (to DIGITAL PCB)：
Componnet-Y (to Monitor out)：
Componnet-Cb (to Monitor out)：
Componnet-Cr (to Monitor out)：
Componnet-Y (to DIGITAL PCB)：
Componnet-Cb (to DIGITAL PCB)：
Componnet-Cr (to DIGITAL PCB)：
YES
Output terminal (K3503 or 3502) flaw .
Defective connection of TV Monitor or TV Monitor flaw
I2C communication wave form (sample)
NO
C3748 + q
C3749 - w
NO
C3732 e
C3733 r
NO
C3714 t
C3705 y
C3706 u
C3707 i
NO
R3740 o
R3731 Q0
R3736 Q1
R3742 Q2
R3746 Q3
R3750 Q4
R3744 Q5
R3748 Q6
R3752 Q7
CLK
DATA
103
Defective connection of N9014.
Power supply IC flaw.
SPEAKER PCB
U6203(V+3.3V), U6204(V-5V)
Defective connection of the connector.
N5909 or N5910
DIGITAL UNIT flaw.
Input terminal (K3503 / K3501) or the parts
of between video select IC (U3703) flaw.
Video selector IC (U3703) flaw.