Kenwood KDC-4551UB/455UW Service Manual page 2

ELECTRIC UNIT (X34- )
J1 ANT
IC1
TUNER
A9V
ATOMIC
IC161
E-VOL
A9V
IC771
E2PROM
2
BU3.3V
IC701
SYSTEM u-COM & USB HOST
1 1 2 1 1 2
IC702
RESET IC
BU5V
Q701
BU3.3V
PANEL3.3V
(REMO DRV)
S701
RESET SW
to DC
CONNECTOR
EXT REMO
(OE REMOTE)
CN701
CONNECTOR
CN601
to GND
PANEL DET
J602 EN601
ROTARY
F-AUX
ENCODER
SW3.3V
IC602 Q602
SW3.3V
REMO PANEL SW3.3
SWITCH UNIT (X16- )
1
1
MUTE
BU3.3V
1
3
9
i-Pod
2 5 8
CP
IC540
SERVO IC
(OASIS)
R902,903
LOAD
CD1.5V CD3.3V
RESISTOR
IC530-532
(FL FILAMENT)
1 CD 3.3V
CD 1.5V
FL+B
5
FL601
KEY
ILLUMI
FL
CN603
9
KEY
USB CN
MATRIX
IC301
PHONE
BU
2
POWER
AMP
1
∗
J321
∗
BU DET
Q321,341
RCA
RCA-OUT
MUTE
BU5V
∗
Q780
BU DET
MUTE
RESET
PS1-1 / PS1-2 / PS1-3
PS2-1 / PS2-2
2
BU3.3V
DC-CN etc
PHONE
ACC5V
ACC5V / BU-DET
IC80
PON-FL ILLUMI+B
PS1-1 / PS1-2 / PS1-3
SW3.3V
PS2-1 / PS2-2
SW5
IC501
AUDIO
MOTOR
CD
DRIVER
CD
BU5V
to MECHA
2
CD
CD3.3V
MECHA
USB5V
BU5V
2
SW3.3V BU3.3V
FL+B
Q951,952 IC931
SW 3.3V VDD3.3V SW 3.3V BU5V
D891
SW3.3V
PHONE
BU3.3V
Q970
BU DET
CN901
Q971
DC-CN
SURGE-
PHONE
DET
SP-OUT
IC901 ACC
BU
P-ANT
P-CON
POWER
SUPPLY
IC
IC961
HI-SIDE
SW
IC981
USB5V
(DC/DC)