Input
CVBS
B
Check the set value of each
IC. Are the voltage values as
follows?
DIGITAL PCB
BN21A - 3pin
: Hi(3.3V)
BN21A - 4pin
: Hi(3.3V)
BN21A - 5pin
: Lo(0V)
Is the power supply voltage
being output correctly?
V+5V : C5107 : + side
V-5V : C5109 : - side
Is a signal being output from
the video amplifier?
CVBS : J5018
•Check the connection between the FRONT CONNECTOR PCB and the VIDEO PCB.
•Check the soldering of the BN21B(VIDEO PCB) / BN21A(DIGITAL PCB )
/ CN21A(FRONT CONNECTOR PCB) / CN21B(FRONT CONNECTOR PCB).
•Check the IC511 power supply volt-
age and check the soldering of the
surrounding circuits.
•The circuit between IC511 and
BN21B are faulty.
Use the jigs to extend the
DIGITAL PCB.
The DIGITAL PCB is faulty.
Check the connection between
the SIDE CONNECTOR PCB and the
VIDEO PCB.
NO
NO
NO
YES
YES
YES
b
All parts are VIDEO PCB parts unless otherwise specified.
w
q
e
r
The regulator part of REG_SPK PCB
is faulty.
NO
100
