Kenwood KR-609, Service Manual

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KRC-609,679R/RY,781R/789
4
PORT
PORT NAME I/O FUNCTION OPERATING CONDITION
No.
1 AM+B O AM power supply. "H" : During receiving AM.
2 FM+B O FM power supply. "H" : During receiving FM.
3 AFS O Noise detection time constant SW.
"H" : During receiving.
"L" : During seeking FM or searching AF.
4 PLL-DATA I/O Data from and to the front-end.
5 PLL-CLK I/O Clock from and to the front-end.
6 EVDD - VDD.
7 GND - GND.
8 - - -
9 BEEP O Beep.
10 REMOTE I Remote sensor.
11 P-ON O SW 14V control. "H" : Power on. "L" : Power off.
12 P-STBY O Power IC stand-by control. "H" : Power IC on. "L" : Power IC off.
13 IC2-SDA I/O IC2 data line.
14 IC2-SCL I/O IC2 clock line.
15 PRE-MUTE O Premute. "L" : Reset / Momentary power down.
16
P-MUTE
O Power IC mute. "L" : Power off / All off / Tel mute.
17
DIM-CON/SC-CON
O Dimmer control or panel u-com control. "H" : Dimmer off. L : Panel off.
18 TEST - Test.
19 P-CON O Power control. "H" : Power on. "L" : Power off.
20 ANT-CON O Antenna control. "H" : Tuner on, TI on.
21 MUTE O Mute.
"ON" : Open. "OFF" : Level "L".
Time constant : 0.48mS.
22 - - - -
23 ACC-DET I ACC detection.
"H" : ACC does not exist.
"L" : ACC exists.
24
DIMMER
I Detects the small signal. "H" : Small off. "L" : Small on.
25
SW 5V
O 5V power supply. "H" : 5V off. "L" : 5V on.
26 CH-MUTE I Mute request from the changer. "H" : Mute on. "L" : Mute off.
27 CH-CON O Changer control. "H" : Changer on. "L" : Changer off.
28
CH-REQ-H
O Request to the changer. "L" : During requesting.
29 CH-RST O Resets the changer. "L" : Normally.
40mS "L" level : Bass boost OFF.
30 EXT-AMP O External amplifier control. 70mS "L" level : Bass boost LOW.
100mS "L" level : Bass boost HI.
31
RESET
I Reset. "H" : Normally. "L" : Reset.
32 XT1 I Sub clock.
33 XT2 - Sub clock.
34 REG-C - To inner u-com's regulator
Power on : During oscillating.
35 X2 - Main clock. Power off or Momentary power down :
No oscillation.
36 X1 I Main clock.
37 VSS - GND.
38 VDD - VDD.
39,40 - - -
41 MOTOR O Main motor. "H" : Motor driving. "L" : Motor stopping.
42 MODE2 I Mode detection for the cassette mechanism.
43 MODE1 I Mode detection for the cassette mechanism.
44,45 - - -
46 SUB- O Sub motor.
47 SUB+ O Sub motor.
48-50 - - -
(X14-) IC1 : SYSTEM µ-COM
MICROCOMPUTER'S TERMINAL DESCRIPTION
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