Harman Kardon FL 8550, Service Manual

Page: 36 / 83

Pin Definitions
Pin Number Pin Name I/O Pin Function Description
1 DO1.1 O Drive output
2 DO1.2 O Drive output
3 DI1.1 I Drive input
4 DI1.2 I Drive input
5 REG - Regulator
6 REO O Regulator output
7 MUTE I Mut e
8 GND1 - Ground 1
9 DI2.1 I Drive input
10 DI2.2 I Drive input
11 DO2.1 O Drive output
12 DO2.2 O Drive output
13 GND2 - Ground 2
14 OPOUT O Op-amp output
15 OPIN(
−
) I Op-amp input (
−
)
16 OPIN(+) I Op-amp input (+)
17 DO3.1 O Drive output
18 DO3.2 O Drive output
19 DI3.1 I Drive input
20 DI3.2 I Drive input
21 V
CC1
- Supply voltage
22 V
CC2
- Supply voltage
23 VREF I 2.5V bias voltage
24 DI4.1 I Drive input
25 DI4.2 I Drive input
26 DO4.1 O Drive output
27 DO4.2 O Drive output
28 GND3 - Ground 3
FL8550
36