BOSE SD268895 Schematic
2.2 (FM) 0 (AM)
7 (FM) 0 (AM)
1.3 @ 87.7
6.8 @ 107.9
PG2 C/1
PG2 D/1
1.2 @ 530
7 @ 1710
PG2 D/1
PG2 C/1
PG2 B/1
3.5
8.5
3.5
3.5
8.5
8.5
1.2
4
4
5
5
10
11
12
13
14
15
_FMIFIn
1
_AMMixOut
2
3
_FMIFBypass
4
_AMIFIn
5
_Gnd
_Tu_LED
6
_St_LED
7
_Vcc
8
_FM_Disc
9
_AM_NB_CF
_FM_SMeter
1
_AM_SMeter
_IFBufOut
_PLL_LPF
4
_Pilot
FMSDAdj_
AMOsc_
VReg_
AMRFIn_
AFC_
AM_AGC_
AMDetOut_
FMDetOut_
DecIn_
LDecOut_
RDecOut_
LAmpIn_
RAmpIn_
LOut_
ROut_
2.2 (FM)
2 (AM)
30
29
6
28
27
26
25
24
23
22
22
21
20
20
19
19
18
17
17
16
6
3.5
3.5
3.5
3.5
0.5 (AM)
0.5 (AM)
3.2
2.8
3.2
3.2
4.2
4.2
4.1
4.1
+10V
+10V
+5V
+5V
PG2 C/1
+10V
PG2 D/7
PG2 C/8
0 (AM)
10 (FM)
10 (AM)
0 (FM)
PG2 C/4
+10V
+10V
PG2 C/4
PG2 C/4
PG2 C/8
PG2 C/4
PG2 D/2
PG2 C/4
+10V
6
8
1/2
7
4
5
SD268895 REV 01
SHEET 1 OF 3
AV28 SERVICE MANUAL 264563
PG3 D/5
PG3 B/3
PG1 B/2
PG1 B/1
+12V
+10V
+5V
+5V
PG1 A/5
PG1 B/4
5 (FM)
0.2 (AM)
+5V
PG1 A/5
PG1 B/5
PG1 B/6
5 (FM)
5 (AM)
0.2 (FM)
10 (AM)
2.3 (FM)
5 (FM)
0.2 (AM)
+5V
2.5
PG1 A/5
2.4
1
2
3
4
5
6
7
8
9
10
11
1
12
24
23
22
21
20
19
18
17
16
15
14
13
2
5
2.2 (FM)
2.4 (AM)
5
5
PG1 C/4
PG1 D/2
+10V
PG1 D/6
PG1 B/7
+5V
+5V
VRAW (+33V)
VRAW (+33V)
+5V
VRAW (+33V)
+10V
+5V
PG1 B/5
+5V
PG1 B/5
8.3
3
3.5
1
2
SD268895 REV 01
SHEET 2 OF 3
AV28 SERVICE MANUAL 264563
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