Kenwood CT--401 Service Manual page 3

1. Pin description of microprocessor. LC865612A(IC302)
Pin No. Pin Name I/O
1 AC-CHK I Power failure input.
2,3 VSS I Connected to ground.
4 SYS-DATA I System control data in.
5 SYS-BUSY I/O System control busy output.
6 DOLBY O Dolby NR output.
7 METER-GAIN O Meter amplifier gain control.
8 REC/PB O Dolby NR REC/PB control.
9 PB-EQ/NORMAL O PB EQ. switch control.
10 REC-EQ-TYPE 1 O Rec EQ. switch (TYPE 1) control.
11 REC-EQ-TYPE 2 O Rec EQ. switch (TYPE 2) control.
12 SYS-DO O Connected with system data.
13 LED-A-FWD PLAY O LED control port of A FWD PLAY.
14 LED-A-REV PLAY O LED control port of A REV PLAY.
15 LED-B-REV PLAY O LED control port of B REV PLAY.
16-20 NC - Unused.
21 SOL-A O A deck solenoid control.
22 SOL-B O B deck solenoid control.
23 VSS - Connected to ground.
24 VDD - Power supply(+5.0v).
25 MECHA-VCC - Control port of power supply for deck.
26 REC O Control port of REC/PLAY.
27 REC-MUTE O Muting control port for recording.
28 A/B O Control port of A or B deck.
29 DUBBING O Unused.
30 BIAS O Bias control port.
31 INPUT-MUT O Input muting control.
32 LINE-MUTE O Line muting control.
33 A-REEL I Reel puls input of A deck.
34 HALF-SW I Half switch input of A deck.
35 A-MODE-SW I Mode switch input of A deck.
36 B-REEL I Reel puls input of B deck.
37 B-HALF-SW I Half switch input of B deck.
38 B-MODE-SW I Mode switch input of B deck.
39 B-REC-FWD-SW I Forward rec detection switch input.
40 B-REC-REV-SW I Reverse rec detection switch input.
41 DO O Data output to IC601(BU2099FV).
42 SI - Unused.
43 CLK O Clock output to IC601(BU2099FV).
44 LCK O IC601(BU2099FV) LCK.
45 OE O IC601(BU2099FV) OE.
46 NC - Unused.
47 SDA O EE PROM(IC304) SDA.
48 SCL O EE PROM(IC304) SCL.
49 NC - Unused.
50 RESET I Reset signal input.
51 VDD - Power supply(+5.0v).
52 NC - Unused.
53 VSS - Connected to ground.
54 CF 6.0 MHz - Main system clock.
55 CF- 6.0 MHz - Main system clock.
56 VDD - Power supply(+5.0v).
57-59 K1-K3 I Key(1-3) input.
60 MODE-SW I Mode switch input.
61 NC - Unused.
62 A-CRO2 I A CrO2 switch input.
63 B-CRO2 I B CrO2 switch input.
64 METER I Input port of level meter.
Active
Description
H
AC on AC off
off on
other DPSS
PB REC
70u 120u
Play Stop
Rec Other
Other Rec
A play Other
Other Rec
off on
off on
Stop Play
CrO2 Nor
CrO2 Nor
2. Pin description of LED driver. ( BU2099FV ,IC601)
Active
Pin No. Pin Name Description
H
L
6 L1 Level Meter X
7 L2 Level Meter X
8 L3 Level Meter X
9 L4 Level Meter X
10 L5 Level Meter X
11 A-REV 1 WAY/1WAY X
12 B 1WAY/REV X
13 C REV/REV X
14 B-FWD B-FWD X
15 REC REC LED X
16 NR DOLBY NR LED off on
17 DUBBING DUBBING LED off on
: LED lights on X : LED lights off
4. Mode SW
Port SW1
(Pin 60) 1 WAY + 1 WAY
( ) u-COM port
3. Key matrix
Port SW1 SW2 SW3
Remarks
L K1 A FWD * A REV
(Pin 57) PLAY PLAY STOP
K2 B FWD * B REV
(Pin 58) PLAY PLAY STOP
K3 * REV. DOLBY
DUBBING
(Pin 59) MODE
* KXF-W3030 only
W3030 only
( ) u-COM port
W3030 only
W3030 only
W3030 only
SW2
SW3
1 WAY + REV. REV. + REV.
SW4 SW5 SW6
A A A
-
FF REW
B B B REC/
FF REW ARM
B
- -
NR PAUSE