Microcomputer's Terminal Description - Kenwood KR-609 Service Manual

KRC-609,679R/RY,781R/789
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3 7 63 1515 0

MICROCOMPUTER'S TERMINAL DESCRIPTION

(X14-) IC1 : SYSTEM µ-COM
PORT
PORT NAME
No.
1 AM+B
2 FM+B
3 AFS
4 PLL-DATA
5 PLL-CLK
6 EVDD
7 GND
8 -
9 BEEP
10 REMOTE
11 P-ON
12 P-STBY
13 IC2-SDA
14 IC2-SCL
15 PRE-MUTE
16
P-MUTE
17
DIM-CON/SC-CON
18 TEST
19 P-CON
20 ANT-CON
21 MUTE
TE
L 13942296513
22 -
23 ACC-DET
24 DIMMER
25 SW 5V
26 CH-MUTE
27 CH-CON
28 CH-REQ-H
29 CH-RST
30 EXT-AMP
31 RESET
32 XT1
33 XT2
34 REG-C
35 X2
36 X1
37 VSS
38 VDD
39,40 -
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41 MOTOR
42 MODE2
43 MODE1
44,45 -
.
46 SUB-
47 SUB+
48-50 -
4
I/O FUNCTION
O AM power supply.
O FM power supply.
O Noise detection time constant SW.
I/O Data from and to the front-end.
I/O Clock from and to the front-end.
- VDD.
- GND.
- -
O Beep.
I Remote sensor.
O SW 14V control.
O Power IC stand-by control.
I/O IC2 data line.
I/O IC2 clock line.
O Premute.
O Power IC mute.
O Dimmer control or panel u-com control.
- Test.
O Power control.
O Antenna control.
O Mute.
- -
I ACC detection.
I Detects the small signal.
O 5V power supply.
I Mute request from the changer.
O Changer control.
O Request to the changer.
O Resets the changer.
O External amplifier control.
I Reset.
I Sub clock.
- Sub clock.
- To inner u-com's regulator
- Main clock.
I Main clock.
- GND.
- VDD.
- -
O Main motor.
I Mode detection for the cassette mechanism.
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I Mode detection for the cassette mechanism.
- -
i
O Sub motor.
O Sub motor.
- -
2 9
8
"H" : During receiving AM.
"H" : During receiving FM.
"H" : During receiving.
"L" : During seeking FM or searching AF.
"H" : Power on. "L" : Power off.
"H" : Power IC on. "L" : Power IC off.
"L" : Reset / Momentary power down.
"L" : Power off / All off / Tel mute.
"H" : Dimmer off.
"H" : Power on. "L" : Power off.
"H" : Tuner on, TI on.
"ON" : Open. "OFF" : Level "L".
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3 6 7 1 3 Time constant : 0.48mS. 1 5
-
"H" : ACC does not exist.
"L" : ACC exists.
"H" : Small off. "L" : Small on.
"H" : 5V off. "L" : 5V on.
"H" : Mute on. "L" : Mute off.
"H" : Changer on. "L" : Changer off.
"L" : During requesting.
"L" : Normally.
40mS "L" level : Bass boost OFF.
70mS "L" level : Bass boost LOW.
100mS "L" level : Bass boost HI.
"H" : Normally. "L" : Reset.
Power on : During oscillating.
Power off or Momentary power down :
No oscillation.
"H" : Motor driving. "L" : Motor stopping.
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.
9 4 2 8
OPERATING CONDITION
L : Panel off.
0 5 8 2 9 9 4 2 8
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9 9
9 9