Pin Names And Functions Of Mn1400 - Technics SL-Q33 Service Manual

I MN14OOPA
P I N N A M E S A N D F U N C T I O N S O F M N 1 4 O O
P i n N o . S y mbol
N a m e
F u n c t i o n
1 Vss
Gro und R e d u c t i o n t o e a r t h i n g p o t e n t i o n a ( N o r m a l l y 0 V )
2
Co9 Repeat
L E D l a m p s w i t c h f o r r e p e a t i n d i c a t i o n . " H " l e v e l a t O N .
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
Cue in g
W h e n t h e c u e i n g l e v e r s w i t c h i s t u r n e d t o u p d i r e c t i o n , A I l a n d
this terminal are shorted.
7
AI3
L i m i t s w i t c h
B o t h i n i n d i c a t e " H " l e v e l a t c u e i n g u p .
I
At2
Lim it switch
I A I l Cuei ng Inp u t te rm i n al fo r cu e i n g ( 2 mot ionsl .
1 0
AI O Start/Stop Input terminal for start-stop and repeat.
l 1
B I 3
Start detection
The terminal to check if the turntable is in rotation.
" H" l ev el d u ri ng r o ta ti o n.
1 2
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.
1 3
B I l
End detection
Like BI2 terminal, end detection of EP record is made by BI2
t e r m i n a l a n d t h i s t e r m i n a l .
1 4
BI O Rest
"L" level
when the arm is on the rest and "H" level if the arm is
out of the rest.
1 5
Eo0 Motor drive
Instruction is given to the arm and the driven motor (Forward
rotation, reverse rotation, low speed, high, speed)
1 6 E o l Motor drive
1 7
Eo2
Motor drive
1 8
E o3
Not used for this set.
1 9
TST Test
Normally used at "L" level to test the discrete unit of micro
computer.
20
FS
R e s e t i n p u t t e r m i n a l
Turn this terminal to "L" level, then the micro computer is reset.
2 l
SNSO Sensor
This is connected to ground for use.
22
S N S l
Sensor
The input from the photo sensor is given as a pulse.
23
Do0
L E D d r i v e
T h e o u t p u t t e r m i n a l t o g e n e r a t e t h e i n f l a r e d r a y , L E D
24
D o l
L E D d r i v e
25
Do2 L E D d r i v e
26
Do3
Not used for this set
2 7
v o o
Power input terminal V p 9 v o l t a g e i s a p p l i e d . ( S t a n d a r d + $ y 1
28
osc
O s c i l l a t o r i n p u t t e r m i n a l The combination of a resistor and a capacitor as the terminal to
generate clock signal, and the required clock is obtained by the
o s c i l l a t i o n c i r c u i t w h i c h c o n t a i n s L S l .