Block Diagram - Kenwood RXD-M31 Service Manual

1. Initialization
1-1 Setting of initial conditions
While pressing the [SET] key, plug the AC power cord
into an AC power outlet.
1-2 Initializing operation
• A microcomputer is initialized for start when the AC
power is turned on while pressing the [SET] key. At
that time, CD mechanism, and CASSETTE mechanism
are also initialized.
• During the initial operation, the display shows "INITIAL-
IZE" and normal indication, after that it goes off immedi-
ately.
1-3 Initial items and back up data
ITEMS
POWER OFF
VOLUME 15
BALANCE CENTER
LOUDNESS OFF
AMP EX. BASS ON
INPUT SEL TUNER
AUX INPUT 0
BASS 0
TREBLE 0
BAND FM
LAST f LIMIT
TUNER LAST Pch
AUTO/MONO AUTO
Pch TEST f
CLOCK AM 12 : 00
PROG ON AM 12 : 00
CLOCK PROG OFF AM 12 : 00
TIMER PRO MODE PLAY
SOURCE TUNER
Pch 1
EXE OFF
OTT OFF
SLEEP OFF
PLAY MODE TRACK
REPEAT OFF
CD RANDOM OFF
PLAY MODE STOP
DIRECTION FORWARD
p
DECK RVS MODE
OPERATION MODE STOP
back up data
1-4 Mechanism initialization
1-4-1 CD mechanism
• If a mechanism error occurs, "C" is indicated on the
display.
1-4-2 CASSETTE mechanism
• If a mechanism error occurs, "X" is indicated on the dis-
play.
2. TUNER preset frequency
Destination
ch
K2 E2 E1/H
1 FM 97.50MHz FM 97.50MHz FM 97.50MHz
2 FM 108.00MHz FM 108.00MHz FM 108.00MHz
3 AM 630kHz AM 630kHz AM 630kHz
4 AM 1000kHz AM 999kHz AM 999kHz
5 AM 1440kHz AM 1440kHz AM 1440kHz
6 AM 1610kHz AM 1602kHz AM 1602kHz
7 FM 87.50MHz FM 87.50MHz FM 87.50MHz
8 FM 87.50MHz FM 87.50MHz FM 87.50MHz
9 FM 87.50MHz FM 87.50MHz FM 87.50MHz
10 FM 89.10MHz FM 89.10MHz FM 89.10MHz
11 FM 87.50MHz FM 87.50MHz FM 87.50MHz
12 FM 90.00MHz FM 90.00MHz FM 90.00MHz
13 FM 106.00MHz FM 106.00MHz FM 106.00MHz
14 AM 530kHz AM 531kHz AM 531kHz
15 FM 87.50MHz FM 87.50MHz FM 87.50MHz
16 FM 98.00MHz FM 98.00MHz FM 98.00MHz
17 FM 98.50MHz FM 98.50MHz FM 98.50MHz
18 FM 87.50MHz FM 87.50MHz FM 87.50MHz
19 AM 990kHz AM 990kHz AM 990kHz
20 FM 97.40MHz FM 97.40MHz FM 97.40MHz
21 FM 87.50MHz FM 87.50MHz FM 87.50MHz
22 FM 87.50MHz FM 87.50MHz FM 87.50MHz
23 FM 87.50MHz FM 87.50MHz FM 87.50MHz
24 FM 87.50MHz FM 87.50MHz FM 87.50MHz
25 FM 87.50MHz FM 87.50MHz FM 87.50MHz
26 FM 87.50MHz FM 87.50MHz FM 87.50MHz
27 FM 87.50MHz FM 87.50MHz FM 87.50MHz
28 FM 87.50MHz FM 87.50MHz FM 87.50MHz
29 FM 87.50MHz FM 87.50MHz FM 87.50MHz
30 FM 87.50MHz FM 87.50MHz FM 87.50MHz
31 FM 87.50MHz FM 87.50MHz FM 87.50MHz
32 FM 87.50MHz FM 87.50MHz FM 87.50MHz
33 FM 87.50MHz FM 87.50MHz FM 87.50MHz
34 FM 87.50MHz FM 87.50MHz FM 87.50MHz
35 FM 87.50MHz FM 87.50MHz FM 87.50MHz
36 FM 87.50MHz FM 87.50MHz FM 87.50MHz
37 FM 87.50MHz FM 87.50MHz FM 87.50MHz
38 FM 87.50MHz FM 87.50MHz FML 74.00MHz
39 FM 87.50MHz FM 87.50MHz FML 65.00MHz
40 FM 87.50MHz FM 87.50MHz FML 69.00MHz
3. Destination list of TUNER
(DSW4=50pin, DSW3=49pin, DSW2=48pin)
U-COM Discrimination
Desti-
Desti-
nation DSW2 Band
DSW4 DSW3
nation
FM
K, P K1 0 0 0
AM
FM
M, X K2 0 0 1
AM
FM
J J 0 1 0
AM
FM
E1
E, T 1 1 0
RDS AM
0=(input low)
4. Main microprocessor M30622MA-198FP (MAIN BOARD IC401)
4-1 Microprocessor periphery block diagram
CD mechanism
Mechanism
control
IC202
circuit
CD-DSP
CXD2587Q
IC102
E TYPE
ONLY
IC103
TUNER
RDS
PLL IC
demodu-
LC72131
lator
DISPLAY
BOARD
IC801
DOT driver
LC75710NE
FD801
FL
CM1829C
4-2 Key matrix
Vref = 5V
VOLTAGE
[V]
MENU
Receiving frequency Channel
IF
range space
87.5MHz~108.0MHz 100kHz +10.7MHz 25kHz
530kHz~1700kHz 10kHz +450kHz 10kHz
87.5MHz~108.0MHz 100kHz +10.7MHz 25kHz
530kHz~1610kHz 10kHz +450kHz 10kHz
76.0MHz~108.0MHz 100kHz -10.7MHz 25kHz
531kHz~1629kHz 9kHz +450kHz 9kHz
87.5MHz~108.0MHz 50kHz +10.7MHz 25kHz
531kHz~1602kHz 9kHz +450kHz 9kHz
1=(input high)
Auto reverse
cassette
mechanism
IC702
Head amp
Mechanism
control
circuit
IC401
u-COM
M30622MA-198FP
IC301
AUDIO
AMP SYSTEM IC
(LC75396)
Q1001
~1007
LED driver
LED
Key matrix
encoder
remocon
O.T.E
REC
RF