Kenwood KDC-348U Service Manual page 2

ELECTRIC UNIT (X34- )
∗ ∗
J921 J701 J601
PRE-OUT
MIC CN
FRONT/REAR/NF
BU3.3V
W551
Q701-706
IC501
PRE
MUTE
ATOMIC
TUNER
A8V
(4MHz)
IC401
2
DME1
CD
MECHA
IC301
LEVEL
∗
IC601,
SHIFT
602
LEVEL
SHIFT
2 19 2 8
IC201
2
SYSTEM u-COM
2
MAIN CLOCK = 48MHz (CRYSTAL 12MHz)
SUB CLOCK = 32.768kHz (QUARTZ)
1
2 1 5
IC202
TYPE RESET
1,2
(2.8V)
S301
RESET SW
J301
J1
J3
USB CN
S1
ROTARY
ENCODER
IC2
REMOTE
ED1
KEY 9
MATRIX
SWITCH UNIT (X16- )
BU BU
IC801
LX-BUS POWER IC
1
Q707,708
MUTE
∗
IC451
1
SPE-ANA
2
AGC AMP
E-VOL
SW3.3V
∗
IC261
iPod
AUTHENTICATION
SW3.3V
∗
IC203 IC802
E2P LEVEL
ROM SHIFT
2 6 2 3 1 3 3
∗
1
5
∗
1 CN901
SD3.3V SD SLOT
CONNECTOR
J2
AUX CN
MIC CN
to GND
CN DET
KEY
ILLUMI
FL
Q301
BU DET
BU-DET
Q102
BU5V
SURGE
BU DET DET
Q101
ACC DET
ACC-DET
∗
Q105
ILLUMI DET
ILLUMI-DET
SWREG5V
D105
LINE MUTE
LINE-MUTE
∗
IC901
LPF AM+B
A901
4VPRE+B
BT
MODULE
SERVO+B
IC921
ANALOG BU3.3V
SW
∗
OME-RC
PS1-1
SWREG5V
PS1-2
SW3.3V
PS1-3
PS2-1
ACC-DET
BU-DET
PANEL3.3V
ILL-DET
LINE MUTE
PON-4VPRE
PON-SW3
FL+B
PON-PAN3
PON-SWERG SWREG5V
FSEL
SW-VBUS
BT3.3V
VBUS-OC
∗ SW3.3V
SD-PWR
USB5V
VBUS OC
∗
CN1
SD3.3V
J1
DC-CN
FRONT L/R
REAR L/R
P-CON P-CON
P-ANT P-ANT
OEM RC OEM RC
MUTE MUTE
ILLUMI ILLUMI
ACC
ACC
BU
IC1
ACC
P-CON
ILLUMI P-ANT
A8V
POWER
AM+B
MUTE
SUPPLY
BU5V
IC
SW5V
ILLUMI+B
Q5-10
PS1-1
4
LEVEL
PS1-2
PS1-3 SHIFT
PS2-1
∗
Q91,92 PON-4VPRE
4VPRE+B
Q1,2 Q3,4
SERVO+B SW14V
Q103
SWREG5V
BU3.3V BU5V
∗
Q302
SW3.3V BU3.3V
Q301 PON-SW3
PANEL3.3V BU3.3V or SW3.3V
PON-PAN3
Q51
DC/DC5V
∗
IC902
PON-SWREG
FSEL
BT3.3V
IC71
HI-SIDE
SW
SW VBUS
∗
Q951
SD3.3V BU3.3V
SD PWR