Technics SL-HD550

Pin
No.
Terminal
Name
I/O Function
1 /RST - Not used, open
2 NC - Not used
3 IN2 I Motor driver 2 input
4 PC2 I Turntable motor drive signal
input (L: ON)
5 NC - Not used
6 IN1 I Motor driver 1 input
7
PV
CC
1
I Driver power supply terminal 1
8 PGND1 - Driver GND terminal 1
9 NC - Not used, connected to GND
10 D1- O Traverse motor driver 1 output
terminal (-)
11 D1+ O Traverse motor driver 1 output
terminal (+)
12 D2- O Spindle motor driver 2 output
terminal (-)
13 D2+ O Spindle motor driver 2 output
terminal (+)
14 D3- O Tracking coil signal output
terminal (-)
15 D3+ O Tracking coil signal output
terminal (+)
16 D4- O Focus coil signal output
terminal (-)
17 D4+ O Focus coil signal output
terminal (+)
18 NC - Not used
19 PGND2 - Driver GND terminal 2
Pin
No.
Terminal
Name
I/O Function
20
PV
CC
2
I Driver power supply terminal 2
21
V
CC
I Power supply terminal
22 VREF I Reference voltage input terminal
23 IN4 I Motor driver 4 input
24 IN3 I Motor driver 3 input
25 RSTIN I
Reset terminal
(Not used, connected to GND)
26 NC - Not used, connected to GND
17. Replacement Parts List