Circuit Description - Kenwood RD-M52MD Service Manual

RD-M52MD/M72MD
www.freeservicemanuals.info
1.Initializing the CD/MD Receiver
1-1Initialization Method
The CD/MD receiver will be initialized when you pressed [SOUND] key and turn the AC on.
1-2 Contents of Initialization
1 MD disc wil not be ejected from MD mechanism.
2 CD disc will be ejected from CD mechanism.
2.Conditions according to the Destination
( ) Port of Microprocessor
DESTINATION SW
DESTI-
UNIT 3
NATION
(40Pin) (39Pin) (38Pin)
K,P KI 0
M E1 0
E3
E,T 1
(RDS)
3. Microprocessor :M30624MG-303FP(MD version)
3-1 Microprocessor periphery block diagram
CDM-34
CD mecha unit
X28
DECK mecha unit
NJU3713D (IC4)
EXPANDER IC
MDM-06
MD mecha unit
(mech ucom)
HD6432227N01FA
4

CIRCUIT DESCRIPTION

2 1 BAND
FM
0 0
AM
FM
0 1
AM
FM
1 0
AM
:M30624MG-304FP(DECK version)
INT
A/D
UART
Back up
circuit
encoder
Digitized in Heiloo the Netherlands
RECEIVING
CHANNEL
FREQUNY
SPACE
RANGE
87.5MHz~108.0MHz 100kHz
530kHz~ 1700kHz 10kHz
87.5MHz~108.0MHz 50kHz
531kHz~ 1602kHz 9kHz
87.5MHz~108.0MHz 50kHz
531kHz~ 1602kHz 9kHz
TUNER unit
(RDS unit)
SIO A/D INT
X29, IC1
Main uCOM
M30624MG-304FP(DECK)
-303FP(MD)
INT
A/D A/D
Key matrix
stnby
(8keys X
REM
2 lines)
IF RF
+10.7MHz 25kHz
+450kHz 10kHz
+10.7MHz 25kHz
+450kHz 9kHz
+10.7MHz 25kHz
+450kHz 9kHz
CD TAPE MD TUNER AUX
AMP_ system_IC
(input selecter)
X29, IC8
EEPROM
AMP hadrware
circuit
A/D
A/D
A/D
PWM
A/D
INT
RESET & CE
RESET
circuit
PWM
LCD driver
SIO
LCD module
(64 64dot)
cd md/ tape
eject
1/20/2020
EMPHASIS
1
0
0
0
0
0
Not for sale!