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Circuit Description; Initialization; Setting Of Initial Conditions; Initial Items And Back Up Data - Kenwood RXD-M31MD Service Manual

Kenwood micro hi-fi component system service manual
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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, MD mechanism and CAS-
SETTE mechanism are also initialized.
• During the initial operation, the display shows "INITIAL-
IZE
" and normal indication, after that it goes off imme-
diately.

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 MD mechanism
• The MD ON code is input within 4 seconds after turned
the power port on, the MD initial code (D122H) is out-
put.
If the MD on code is not input, the error indication is
displayed as "M" on the display.
1-4-3 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-
DSW2 Band
nation
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
E1
FM
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
IC103
ONLY
TUNER
RDS
PLL IC
demodu-
LC72131M
lator
DISPLAY
BOARD
IC801
DOT driver
LC75710NE
ED1
FL
CM1829C
4-2 Key matrix
Vref = 5V
VOLTAGE
[V]
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
MD
MDM-98A
LED
Key matrix
encoder
remocon
RF
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