Kenwood MDX-F1 Service Manual

MDX-F1
7
CIRCUIT DESCRIPTION
5. Voltage Key Matrix
(port # of IC601)
Voltage of Key 0~0.35V 0.5~0.9V 1.0~1.5V 1.6~2.1V 2.2~2.8V 2.9~3.4V 3.5~4.0V 4.1~4.6V 4.8~5.0V
KEY1(#91) SOUND REPEAT MENU SET MD EJECT MD REC - TAPE REC OFF
KEY2(#90) POWER STOP
MD CD TUNER TAPE
SKIP UP
SKIP
OFF
PLAY/PAUSE PLAY/PAUSE FM/AM PLAY DOWN
Port # Port Name I/O Description
1 4M/16M I GND
2 64M I GND
3 LDVAR O Laser power adjust port
4 ADJS O Check port
5 CIN I Track count port
6 NC - No use
7 UNLOCK I GND
8 BYTE I GND
9 CNVSS I GND
10 STID OUT O ST-ID output port
11 SEACH OUT O MD research port
12 RESET I Reset signal input port
13 NC - No use
14 VSS - GND
15 MCCK I 8.4672MHz
16 VCC I +3.2v
17 NC I Connection to H level
18 DINT I Interrupt signal from MD LSI
19 SFSY I Frame synchro
20 ST-ID I ST-ID IN/MD ON/re-power after power breakdown
21 SERCH I CD search input port
22 MDR SW O Save control motor drive
23 CDB SEL O CD BLK SEL output port
24 DSENSE I Servo SENSE signal form MD LSI input port
25 PDOWN I Power down detection port
26 HDON O Current control of record head
27 EEPROM O Cancel signal output port to EEP-ROM
28 4.23 O 4.23MHz
29 EEPK O EEP-ROM serial clock port
30 EEPD I/O EEP-ROM data I/o port
31 MDDATA O MD data output port
32 KDATA I System data input port
33 DSCK I System synchro clock input port
34 DSTB O System line busy or to permit usage
35 DATA O R data
36 SBO I Serial data in sub code input port
37 SBCK O System line of serial clock in sub code output port
38 LATCH O R-latch
39 R/P O Rec/play selector
40 FOK I Focus servo monitor port
41 FLASH L I No use
42 CLOCK O R clock
43 SYRS O MD LSI resister selector output port
44 SYRD O MD LSI read signal output port
45 SYWR O MD LSI wright signal output port
46 FLASH H I No use
47-54 SYSD(7-0) I/O MD LSI data bus(0-7)
55-59 SLOT(1-5) I No use
60 NC O No use
61 CRTRO SW I GND
62 VCC I +3.2V
63 INNER I Pickup start position detection port
64 GND - GND
65 L3DATA O AD/DA serial data output port
66 L3MODE O AD/DA serial mode output port
67 L3CLK O AD/DA serial clock output port
6. MD System Microprocessor:IX0342AW(IC1401)

Kenwood MDX-F1 Specifications

Amplifier Section

rated output power during STEREO operation	4 W + 4 W
speaker unit	80 mm, cone type

Tuner Section

FM tuning frequency range	87.5 MHz ~ 108 MHz
MW (AM) tuning frequency range	531 kHz ~ 1, 602 kHz

General Specifications

power consumption	38 W
standby power consumption	0.3 W
dimensions (W x H x D)	464 mm x 182 mm x 243 mm
weight (net)	5.4 kg