Denon AVR-1912E3 Service Manual page 64

B
Input
S
q
Is the power supply voltage
correctly output?
FRONT CONNECTOR B'D
V+5V : CP13B-4pin
V-5V : CP13B-1pin
YES
w
Check on set value of each IC.
Is they the following voltage
values?
HDMI B'D
FB124 : L(0V))
FB126 : L(0V)
FB118 : L(0V)
FB120 : L(0V)
YES
e
Extend HDMI B'D using a jig.
r
Is the power supply voltage
correctly output?
V+5V : C951 : + side
V-5V : C947 : - side
YES
t
Is the signal output from the
video amplifier?
S-Y : IC823-7pin
S-C : IC823-1pin
YES
y
Is the signal output from the
video amplifier?
Y/C MIX : IC821-1pin
YES
Check cable between main
unit and monitor or check
monitor.
NO
REGULATOR B'D flaw.
NO
HDMI B'D flaw.
NO
Check connection of FRONT
CONNECTOR BD and AV BD.
Is the signal input to selector
NO
(IC826)?
S-Y : 1pin
S-Y : 12pin
YES
Check power supply voltage of
IC826 and IC823, and surrounding
circuitry soldering.
Is the signal input to selector
NO
(IC806)?
Y/C MIX : 12pin
YES
Check power supply voltage of
IC806 and IC821, and surrounding
circuitry soldering.
64
NO
Check cable between main unit and
player or check player.
Check the pattern from IC823 to
IC821.
Is the signal input to video amplifier
NO
(IC821)?
Y/C MIX : 5pin
Check power supply voltage of
IC821, and surrounding circuitry
soldering.
b Unless specified, AV B'D part.
NO
YES