Denon S-301 Service Manual page 62

QQ
3 7 63 1515 0
Block Diagram
OPIN1+
IN1+ 1
2
IN1-
3
OUT1
IN2+
4
IN2- 5
GND
6
GND 7
OUT2 8
IN3+ 9
TE
L 13942296513
10
IN3-
OUT3
11
12
IN4+
IN4-
Note.
Detailed circuit of the output power amp
From input opamp
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SVCC
OPIN1-
OPOUT1 VREF
48 47 46 45 44
13 14 15 16 17
OUT4 CTL FWD REV GND
10 K
10K
40 K
Pref
10K
Vref
10K
Pref1 is almost PVCC1 / 2
Pref2 is almost PVCC2 / 2
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8
OPIN2+
GND GND
43 42 41
40 K
10K
40K
10 K
40K
10 K
10K
40K
40K
10K
10 K 40K
40K
10 K
10K
40K
40K
10 K
40K
10 K
40K
Q Q
10 K
3 6 7 1 3
10 K
40K
S M
S
W C
18 19 20
GND SGND
40 K
DO+
+
40 K
+
DO-
40K
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62
2 9 9 4 2 8
OPOUT2
OPIN2- PS PVCC1
40 39 38 37
POWER
SAVE
40K
10K
40K
10K
40K
10 K
10 K
40K
1 5 0 5 8 2 9 9 4
D
+
-
D
MUTE123 MUTE4 TSD-M
21 22 23 24
MUTE4 TSD-M PVCC2
MUTE123
m
co
S-301
9 9
36 DO1+
35 DO1-
DO2+
34
DO2-
33
32 DO3+
GND
31
GND
30
DO3-
29
DO4+
28
2 8 9 9
27
DO4-
DO5+
26
25
DO5-