Rx Af Circuit - Furuno FS-1503 Service Manual

RX H3E
DATA
SP OFF
CLK
U11, 12
RX AF OFF
ST TX/RX
MIC&TONE
MIC ON
LINE ON
MUTE
CPU
MUTE
RX H3E RX AF OFF
U18
5
SSB, TLX
3
4
RX H3E
U18
6
AM 9
8
TX AF LINE
LINE ON
12
11
Q33 LINE IN
11
12
U20 U20
13 5
C141
1 2 3 4
INTERCOM
INTERCOM
Q32
13 U19
2
1
C140
U20
6 U13 1/2
8 9
C139 U10 1/2, 2/2
Figure 2-19 RX AF Circuit
2-25
MIC & TONE MIC ON
6 U19 5
9 8 3
LINE IN TX TONE
U19
10
U20
10
AF VR
C142
U13 2/2
SP OFF
6
8
LINE OUT TONE
SQ SIG
U19 U14
4
MIC
PHONE
(10mW/200 Ω )
SP
U21 U15
9
EXT SP
(TDA2003H)