Block Diagram; Components Description - Kenwood KDC-MP408U Service Manual

DPU1
A
E
C
FO COIL
TR COIL
DM1
LOADING &
SPINDLE
MOTOR
DM2
LOADING &
SLED
MOTOR
● ELECTRIC UNIT (X34-577x-xx)
Ref. No. Application / Function
IC10 A8V REF Power Supply
IC20 D3.3V REG
IC60 SW REG
IC100 OP-AMP
IC230 Hi-side SW
IC300 RDS Decoder
IC480 E-VOL
IC500 Power IC
IC600 System μ-COM
IC601 Reset IC
IC603 Muting Logic IC

BLOCK DIAGRAM

CD PLAYER UNIT (X32-6130-00)
IC4
SIGNAL
A,B,C,E,F
PD
B
Q1
F
APC LD
VREF
IC3
FO OUT
FO OUT
TR OUT
TR OUT
DM OUT
FM OUT
MOTOR
DRIVER
DM OUT
FM OUT
X1
CLOCK
16.934MHz

COMPONENTS DESCRIPTION

Outputs 1.27V.
Outputs 1.8V. Power supply for SOC.
Outputs 5.0V. Power supply for D5V, FL+B and USB5V.
Reference supply for 4V pre-out.
Overcurrent protection of USB power supply. When pin4 goes Hi, USB5V is ON.
Decodes RDS signal.
Controls the source, volume and tone.
Amplifi es the front L/R and the rear L/R to 50W maximum.
Controls FM/AM tuner, the changer, CD mechanism, USB, panel, volume and tone.
Lo when detection voltage goes below 3.6V.
Controls logic for muting.
KDC-MP408U/MP438U/X492/MP5039U/MP5539U/W5041UA/
W5041UG/W5141UAY/W5141UGY/W5541U/W5641UY
SRAMSTB
SO
SI
BUCK
CCE
PIO0
MRST
RF AMP
+
BSIF ST REQ
SERVO
BSIF GATE
PROCESSOR
+
BSIF DATA
MP3 DECODER
BSIF BCK
+
WMA DECODER BSIF LRCK
+
C88,R82
AAC DECODER
R-ch CR FILTER
+
1M bit SRAM
C87,R83
L-ch CR FILTER
Q13
REVERSAL
ZDET
CIRCUIT
A3.3V
AGND
IC5
SW1.5V REG
IC6
SW3.3V REG
IC11
BU1.5V REG
Operation / Condition / Compatibility
MOTHER
BOARD
(X34- )
SRAMSTB
SO
SI
BUCK
CCE
PIO0
MRST
BSIF ST REQ
BSIF GATE
BSIF DATA
BSIF BCK
BSIF LRCK
R-ch
L-ch
MUTE L/R
A8V
A.GND
BU5V
P.ON
D.GND
S1
LOS-SW
S2
12EJE-SW
S3
LOE-SW
8EJE-SW
DRV MUTE
LO/EJ
MOTOR
S7.5V
S.GND
3