27
VSX-108
•
Pin Function
00206458-040 (LA6458S) (MAIN PCB : IC202, IC208)
• Dual Operational Amplifier IC
•
Block Diagram
V
CC
V
OUT1
V
IN1
V
IN1
V
IN2
V
IN2
V
OUT2
V
CC
V
EE
1
2
3
4
5
6
7
8
9
No.
Function
No.
Function
1
FM IF input
16
Host amp. input/output
2
AM MIX output
17
3
FM IF input by-pass
18
4
AM IF input
19
5
GND
20
MPX output
6
TU-LED
21
7
ST-LED and AM IF output
22
MPX input
8
Power supply pin
23
FM demodulation output
9
FM detector
24
AM detection output
10
Connection pin of AM narrow Band-pass C.F
25
AM AGC
11
FM S-meter output
26
AFC
12
AM S-meter output and AM SD sensitivity adjustment
27
AM RF input
13
AM/FM IF buffer output and output control SW (mute SW)
28
REG
14
Phase comparator Low-pass filter (Switch the FM/AM)
29
OSC
15
Pilot detector Low-pass filter (Forced monoral)(VCO stop)
30
OSC buffer output and FM SD sensitivity adjustment
