Technics SL-Q33 Service Manual

I
MN14OOPA
PIN
NAMES
AND
FUNCTIONS
OF MN14OO
Pin
No.
Symbol
Name
Function
1
Vss
Ground
Reduction
to earthing
potentiona
(Normally
0V)
2
Co9
Repeat
LED lamp
switch
for
repeat
indication.
"H"
level
at
ON.
3
Co8
Start/Stop
Start-Stop control
Signal.
"H"
level
at
start.
4
Co7
No
provided
to this
set.
5
Co6
Start/Stop
and repeat
For
start-stop
instructions.
6
Co5
Cueing
When
the cueing lever
switch is
turned
to
up
direction, AIl and
this
terminal
are shorted.
7
AI3
Limit
switch
Both in
indicate
"H"
level
at
cueing
up.
I
At2
Limit
switch
I
AIl
Cueing
Input
terminal
for
cueing
(2
motionsl.
10
AIO
Start/Stop
Input
terminal
for
start-stop
and repeat.
l1
BI3
Start detection
The terminal
to check if
the turntable
is in
rotation.
"H"
level
during rotation.
12
BI2
End
detection
When
the
pulse
for
end defection
of LP record
is
give,
the level
is
turned
to
"H"
and
the
arm return
motion follows.
13
BIl
End
detection
Like
BI2 terminal, end detection
of EP
record
is
made
by BI2
terminal
and
this
terminal.
14
BIO Rest
"L"
level
when the arm
is on the rest and
"H"
level if the arm is
out
of
the rest.
15
Eo0
Motor drive
Instruction is
given
to
the arm and the
driven
motor
(Forward
rotation,
reverse rotation,
low
speed, high,
speed)
16
Eol
Motor
drive
17
Eo2 Motor
drive
18
Eo3
Not
used
for
this set.
19
TST
Test
Normally
used at
"L"
level
to test
the discrete
unit
of
micro
computer.
20
FS
Reset input
terminal
Turn
this
terminal
to
"L"
level, then
the
micro computer
is
reset.
2l
SNSO
Sensor
This is
connected to
ground
for
use.
22
SNSl
Sensor
The
input
from
the
photo
sensor is
given
as a
pulse.
23
Do0
LED drive
The
output terminal
to
generate
the inflared
ray,
LED
24
Dol
LED drive
25 Do2
LED drive
26
Do3
Not
used
for
this set
27
voo
Power
input
terminal
Vp9 voltage is
applied.
(Standard
+$y1
28
osc
Oscillator
input
terminal
The combination
of a resistor and
a capacitor
as the
terminal to
generate
clock
signal,
and the required
clock is obtained
by the
oscillation
circuit
which
contains
LSl.

Technics SL-Q33 Specifications

General

Brand	Technics
Model	SL-Q33
Category	Turntable
Language	English