Detailed Circuit Of The Output Power Amp - Denon DVD-2900 Service Manual

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Block Diagram
3 7 63 1515 0
OPIN1+
48
IN1+ 1
2
IN1-
3
OUT1
IN2+
4
IN2-
5
GND
6
GND 7
OUT2 8
IN3+ 9
10
IN3-
TE
L 13942296513
OUT3
11
12
IN4+
13
IN4-
Note.

Detailed circuit of the output power amp

From input opamp
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SVCC
OPIN1-
OPOUT1 VREF GND
47 46 45 44 43
10K
10 K
10 K
10K
10K
10 K
10 K
10K
10 K
10 K
10 K
10 K
14 15 16 17 18
OUT4 CTL FWD REV GND
40 K
10 K
+
10K
40 K
Pref
40 K
10K
Vref
+
10K
40K
Pref1 is almost PVCC1 / 2
Pref2 is almost PVCC2 / 2
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8
OPIN2+
GND OPIN2-
42 41 40
40 K
40K
40K 10K
10K
40K 10 K
40K
10 K
40K
40K
40K
40K
40K
40K
Q Q
3 6 7 1 3
40K
S M +
S
-
W C
MUTE123
19 20 21
GND SGND
MUTE123
DO+
DO-
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62
DVD-2900
2 9 9 4 2 8
OPOUT2
PS PVCC1
39 38 37
POWER
SAVE
36
35
40K
34
33
40K
40K
32
40K
31
30
29
28
27
1 5 0 5 8 2 9 9 4
D
26
D
25
MUTE4 TSD-M
22 23 24
MUTE4 TSD-M PVCC2
m
co
62
9 9
DO1+
DO1-
DO2+
DO2-
DO3+
GND
GND
DO3-
DO4+
DO4-
2 8 9 9
DO5+
DO5-