Marantz NR1504 /U1B Service Manual page 77

A
Output
CVBS
q
Check on set value of each IC.
Is they the following voltage
values?
HDMI B'D
N3404-4pin : L(0V)
N3404-5pin : H(5V)
YES
w
Extend HDMI B'D using a jig.
e
Is the power supply voltage
correctly output?
V+5V : C5407 : + side
V-5V : C5421 : - side
YES
r
Is the signal output from the
video amplifier?
V : IC5400-7pin
YES
The pattern between IC5400
and JK5400 are defective.
NO
HDMI B'D flaw.
NO
Check connection of FRONT
CONNECTOR BD and AV BD.
Is the signal output to selector
NO
(IC5401)?
V : 3pin
YES
Check power supply voltage of
IC5400 and surrounding circuitry
soldering.
77
Check power supply voltage of
NO
IC5401 and surrounding circuitry
soldering.
b Unless specified, AV B'D part.