Circuit Description - Kenwood MDX-F1 Service Manual

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