Kenwood KRC-20SA Service Manual page 6

KRC-20SA/G
MICROCOMPUTER'S TERMINAL DESCRIPTION
Pin No. Pin name
53 EQ MUTE
54 FWD/REV
55 -
56 REMO
57-60 -
61 ACC DET
62 B.U. DET
63 S METER
64 PANEL
65 GND
66 GND
67 HOLD
68 VDD
69 GND
70 GND
71,72 -
73 VDD
74 GND
75 GND
76 VSS
77,78 -
79 GND
80 XOUT
6
I/O Description
O Tape equalizer mute on/off output
I FWD/REV mode detection input
O -
Data input from the remote control
I
light sensor
O -
I ACC detection input
I Momentary power down detection input
I S-meter input from the F/E
I Panel detaching detection input
I -
I -
I MI-COM. HOLD input
- VDD connection terminal
I -
I -
O -
- Positive power supply connection terminal
I -
I -
- Ground connection terminal
O -
- TEST terminal 1
O Main clock resonator connection terminal
Processing Operation
N.C. (Not used)
Lo : REV mode
N.C. (Not used)
N.C. (Not used)
N.C. (Not used)
Hi : ACC ON
Hi : When momentary power down detected or
B.U. OFF, Lo : B.U. ON
Lo : Panel not detached
Connected to GND lines.
Connected to GND lines.
Lo : Hold
Connected to B.U. 5V lines.
Connected to GND lines.
Connected to GND lines.
N.C. (Not used)
Connected to B.U. 5V lines.
Connected to GND lines.
Connected to GND lines.
Connected to GND lines.
N.C. (Not used)
Connected to GND lines.