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Circuit Description - Kenwood MDX-F1 Service Manual

Md personal stereo system
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1. Initialization
1-1 Setting
Insert the AC power cord with pressing the REPEAT key.
1-2 Operation
Display shows "INITIALIZE" if the unit works in initializa-
tion mode. It shows "STANDBY" after the unit is end of
work.
The unit is shipment condition(MD disc comes out, RAM
is clear, Backup data is also.) if normal mechanisms are
initialization.
Display shows error message as follows if the every
mechanism has an initialization error and CD door switch
malfunction.
CD
MD
CASSETTE
CD DOOR SW
2. TUNER Preset
P.CH
BAND
FREQ
1
FM
83.50MHz
2
FM
76.00MHz
3
FM
89.10MHz
4
FM
108.00MHz
5
FM
91.50MHz
4. MAIN MICROPROCESSOR: M30622MC-746(X09,IC601)
4-1 Port descriptions
Port #
Port Name
I/O
1
DSTP
O
2
XLON
O
3
LDC
O
4
SCLK
O
5
SENSE
I
6
CD CLK
O
7
XLAT
O
8
BYTE
I
9
CNVSS
I
10
XCIN
I
11
XCOUT
O
12
RESET
I
13
XOUT
O
14
VSS
-
15
XIN
I
16
VCC(B.U.)
-
17
NMI
I
18
REMOCON
I
19
NC
O
20
SCOR
I
21
XRST
O
22
PLL DO
I
23
SA CE
O
24
SA CLK
O
25
SA DATA
O
26
ST
I
27
SD
I
28
SQCK
O
29
SQSO
I
30
NC
O

CIRCUIT DESCRIPTION

Error
The first digit: C
The third digit: M
The 5th digit: X
The 7th digit: S
P.CH
BAND
FREQ
6
FM
90.00MHz
7
FM
76.00MHz
8
AM
1629kHz
9
AM
1602kHz
10
AM
999kHz
Descriptions
CD disc motor servo control output port
Bias control port
LD control
CD sense data read clock
CD sense input
Clock for CD DSP
CD DSP latch output
GND
GND
Timer clock(32.768kHz)
Timer clock(32.768kHz)
Microprocessor reset signal input
Main clock port
GND
Main clock port (10MHz)
Power supply port (+5V)
+5.0V
Remote control signal input port
open
Sub-code synchro signal port
CD DSP reset signal output port
PLL data input port
PLL IC chip enable
PLL IC clock
PLL IC data output port
Stereo sensor port for tuner
SD sensor port for tuner
Sub-code clock for CD
Sub-code input port for CD
open
P.CH
BAND
FREQ
11
AM
630kHz
12
AM
1440kHz
13
FM
106.00MHz
14
AM
531kHz
15
FM
76.00MHz
16
FM
91.50MHz
17
FM
92.50MHz
18
FM
76.00MHz
19
AM
990kHz
20
FM
91.40MHz
21
AM
531kHz
22
FM
76.00MHz
23
FM
76.00MHz
24
FM
76.00MHz
25
FM
76.00MHz
3. TUNER SPECIFICATIONS
RECEIVING
BAND
FREQ.
FM
76.0MHz~87.5MHz
FM
87.5MHz~108MHz
AM
531kHz~1629kHz
MDX-F1
P.CH
BAND
FREQ
26
FM
76.00MHz
27
FM
76.00MHz
28
FM
76.00MHz
29
FM
97.50MHz
30
FM
106.00MHz
31
FM
76.00MHz
32
FM
76.00MHz
33
FM
76.00MHz
34
FM
76.00MHz
35
FM
76.00MHz
36
FM
76.00MHz
37
FM
76.00MHz
38
FM
76.00MHz
39
FM
108.00MHz
40
AM
945kHz
CHANNEL
IF
PLL
SPACE
100kHz
-10.7MHz 25kHz
50kHz
-10.7MHz 25kHz
9kHz
+450kHz
9kHz
ACTIVE
H
L
OFF
ON
ON
OFF
OFF
ON
1
0
NORMAL
RESET
NORMAL
RESET
MONO
STEREO
UNTUNED
TUNED
5

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