Technics ST-HD501

Pin
No.
Mark I/O /
Division
Function
1 PS-IN O R/L output terminal for
surround
2 PS+IN I Phase shift filter input
terminal for surround (Not
used, open)
3 KIN1 O Key control adaptor output
terminal (Not used, open)
4 KOUT1 I Key control adaptor input
terminal / (Not used,
connected to GND)
5
TAPEREC1
O Rec signal output terminal
from / surround mix amp.
terminal
6 MDREC1 O Select common output rec
signal / output terminal
7 EXT
OUT1
8 DPL1 I Tone signal input terminal
(Not used, connected to
GND)
9 F1F1 I Resonance impedance
connect / terminal (Not
used, open)
10 F1O1 O Resonance buffer amp
output terminal / (Not used,
open)
11 FIN1 I Resonance buffer amp
input terminal / (Not used,
open)
12 F2F1 I Resonance impedance
connect / terminal
13 F2O1 O Resonance buffer amp
output terminal
14 F2IN1 I Resonance buffer amp
input terminal
15 F3F1 I Resonance impedance
connect / terminal
16 F3O1 O Resonance buffer amp
output terminal
17 F3IN1 I Resonance buffer amp
input terminal
18 F4F1 I Resonance impedance
connect / terminal
19 F4O1 O Resonance buffer amp
output terminal
8