Marantz NR1605/U1B Service Manual page 80

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B
Input
CVBS
q
Check the set value of each
IC. Are the voltage values as
follows?
HDMI PCB
N1018 - 3pin
N1018 - 4pin
N1018 - 5pin
YES
w
Use the jigs to extend the
HDMI PCB.
e
Is the power supply voltage
being output correctly?
V+5V :
C5407 : + side
V-5V :
C5421 : - side
YES
r
Is a signal being output from
the video amplifier?
CVBS :
IC5401 1pin
YES
•The circuit between IC5401
and JK5400 are faulty.
NO
The HDMI PCB is faulty.
: Hi(3.3V)
: Hi(3.3V)
: Lo(0V)
NO
Check the connection between the
FRONT CONNECTOR PCB and the
VIDEO PCB.
•Check the IC5401 power supply
NO
voltage and check the soldering of
the surrounding circuits.
•The circuit between IC5401 and
JK5400 are faulty.
All parts are VIDEO PCB parts unless otherwise specified.
b
80

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