Table of Contents
Advertisement
KD-9X/SX6
CIRCUIT DESCRIPTION
Terminal
names
and their uses are shown
in the following
table.
INPUT TERMINALS
Terminal
names
Usage
Auto-size-selector (A.S.S.) Q1 signal input
Auto-size-selector (A.S.S.) Q2 signal input
Music-interval-sensor signal input
Pulse generator signal input
PROGRAM¢PLAY/CUT switch input
REPEAT switch input
CUEING switch input
33-AUTO-45
switch input
FORWARD switch input
REVERSE switch input
Turntable lock signal input
Tonearm rest position detect signal input
Note:
Turntable lock signal is ''H'' when the turntable
is quartz
locked and "L" for others.
OUTPUT TERMINALS
Terminal
Pin
names
No.
Solenoid drive signal 1 output
Solenoid drive signal 2 output
Not used
Not used
7-segment display (a) output
7-segment display (b) output
7-segment display (c) output
7-segment display (d) output
7-segment display (e) output
7-segment display {f) output
7-segment display (g) output
CUEING LED display output
Piezoelectric buzzer signal output
Not used
REPEAT LED display output
Not used
FORWARD drive signal output
REVERSE drive signal output
Turntable ON/OFF signal output
Turntable speed signal output
Note:
FORWARD
drive signal is a signal to drive the tonearm to-
ward the spindle when FORWARD
key is pressed.
REVERSE
drive signal is a signal to drive the tonearm
away from the
spindle when
REVERSE
key is pressed.
OTHER
TERMINALS
Terminal
Usage
names
ag
Xtal
For connecting resonator for internal oscillation
INT
{interrupt request signal input
RES
Reset signal input
TEST
For testing LS! (normally connected to OV)
GND terminal for power supply
Power supply ( + 5V)
External clock input (When
using internal clock,
connect the resonator between
this pin and
pin 1.)
Note:
Immediately after the power is turned on, "L" signal is ap-
plied to RES terminal.
This initializes all output ports to "H".
Then the program starts and appropriate signals are output
at each ports.
2. Music-interval
Detection Sensor
In the KD-9X, photo sensor (photo interrupter) is concealed
in the cartridge.
For this reason, when the sensor is found
defective, cartridge must be changed.
When the stylus tip is 5 mm
above the record disk surface,
the point where the sensor detects is 0.5 mm
closer to the
spindle from the point right below the stylus tip.
Maximum
reflected
output
Spindle
=
Record disk
surface
0. 5am
Fig. 2 Cartridge viewed from the front
Advertisement
Table of Contents
