Marantz SR7009/U1B Service Manual page 106

B
The VIDEO PCB is faulty.
Use the jigs to extend the DIGITAL PCB.
Check power supply voltage and I2C control signal of
video selector IC.(IC511)
V+3.3V
V-5V
I2C(SCL)
I2C(SDA)
(VIDEO PCB)
Check the signal input to video selector IC. (IC511)
V
OMPONENT-Y
COMPONENT-Cb
COMPONENT-Cr
(VIDEO PCB)
Check the signal output from video selector IC. (IC511)
(VIDEO PCB) to MONITOR
V
OMPONENT-Y
COMPONENT-Cb
COMPONENT-Cr
MONITOR OUT
Output terminal (JK511 or JK513) or pattern flaw.
HDMI OUT
Defective connection of FRONT CNT PCB (BN21B) or
FRONT CNT PCB pattern flaw.
I2C communication wave form
YES
: J5043
: J5042
: J5046
: J5047
YES
: C5107
: J5010
: J5007
: J5006
YES
to DIGITAL PCB
: J5019 BN21B-17pin
: J5021 BN21B-15pin
: J5028 BN21B-13pin
: J5029 BN21B-11pin
YES
CH1: CLK
CH1: DATA
NO
Power supply IC (IC513) flaw.
SIDE CNT PCB(BN28B) flaw.
Video selector IC(IC511) の flaw.
NO
The circuit between IC511 are faulty.
NO
Defective the soldering video selector IC (IC511) or
video selector IC (IC511) flaw.
106