Technics SJ-HD501 Servise Manual page 45

Pin Mark I/O
No. Division
1 DACRST O
2 DEO O
3 MUTE —
4 AD RST O
5 O
NRFSTBY
6 PC O
7 MSP O
RST
8 LOAD1 O
9 LOAD0 O
10 NEFMON O
11 TEST01 O
12 TVSW I
13 DISC IN I
14 REFLECT I
15 LOAD I
SW0
(OPEN)
16 LOAD I
SW1
(TRG)
17 LOAD I
SW2
(PLAY/REC)
18 LOAD I
SW3
(PLAY)
19 PROTECT I
20 MMOD —
Function
DAC reset signal output
terminal to IC4 ("L":Reset)
DE emphasis signal output
terminal to IC4("L":DE
emphases)
AD-DA mute output
terminal (Not used, open)
Reset signal output
terminal
Standby control signal
output terminal
("L":Standby)
Transistor drive signal
output terminal ("H":Power
ON)
MSP reset signal output
terminal ("L":Reset)
Loading motor drive 1
output terminal
Loading motor drive 0
output terminal
Magnetic head current
output terminal
Test signal output terminal
(Not used, open)
Traverse innermost
detection switch signal
input terminal
Disc detection switch
signal input terminal
Reflection rate switch
signal input terminal
Loading mechanism
position det. Switch 0
signal input terminal
Loading mechanism
position det. Switch 1
signal input terminal
Loading mechanism
position det. Switch 2
signal input terminal.
Loading mechanism
position det. Switch 3
signal input terminal
Erase prevention switch
signal input terminal
Connected to GND
45