22
DV-120-K
1
2
3
4
A
B
C
D
E
F
1
2
3
4
N
O CUT AUDIO L,R O
N
KARAOKE
Is there voltage at pin 5 of
CP6501 about 5
V
?
Check IC505 and peripheral circuit.
N
o
Yes
N
o
Yes
Is there AUDIO signal at
pin 3 of CP6501 ?
Check IC4001 and peripheral circuit.
Yes
N
o
CO
NN
ECT MIC 1.
Is there voltage at C6503
about 3.8
V
?
Check IC6501,IC6503 and
peripheral circuit.
Symptoms That May Occur When Any Of The Followin
g
ICs Is In Failure
IC
Symptoms
16M Flash ROM
(D
V
D MT PCB Assy : IC4004)
The power cannot be turned on.
Downloading of the firmware cannot be performed.
DVD IC
(D
V
D MT PCB Assy : IC4001)
Any kind of symptoms (no power, a failure in any of the servo, video and audio systems, etc.) may be
generated, because the D
V
D processing is performed by a single chip.
64M SDRAM
(D
V
D MT PCB Assy : IC4005)
N
o power.
Block noise is generated during playback.
