Onkyo TX-SR804 Service Manual page 28

A B
SCHEMATIC DIAGRAM-3 (SD-3)
POWER AMP SECTION-2
NAAF-9003
U20
1
2
3
4
<Note>
SD-x:XY is short for Shcematic Diagram-x and
each socket's location, X=A to H, Y=1 to 5.
NOTE
THE COMPONENTS IDENTIFIED BY MARK ! ARE CRITICAL FOR SAFETY
REPLACE ONLY WITH PART NUMBER SPECIFIED.
VOLTAGE (MEASURED WITH VOLTMETER) IS DC VOLTAGE.(NO INPUT SIGNAL).
ALL PNP TRANSISTORS ARE EQUIVALENT TO 2SA1015-GR UNLESS OTHERWISE NOTED.
5
ALL NPN TRANSISTORS ARE EQUIVALENT TO 2SC1815-GR UNLESS OTHERWISE NOTED.
ALL DIODES ARE EQUIVALENT TO 1SS133 UNLESS OTHERWISE NOTED.
ELECTROLYTIC CAPACITORS ( ) ARE IN uF/WV.
ALL CAPACITORS ARE IN pF/50WV UNLESS OTHERWISE NOTED.
EX) 030- 3pF 330- 33pF 331- 330pF 333- 0.033uF
ALL RESISTORS ARE IN OHMS 1/4WATTS UNLESS OTHERWISE NOTED.
THE THICK LINES ON PC BOARD ARE THE PRINTING SIDE OF THE PARTS.
EX) PRINTING SIDE
CIRCUIT IS SUBJECT TO CHANGE FOR IMPROVEMENT.
C
DRIVER AMPLIFIER PC BOARD
Front L ch
+55.3V
2SC1845-E
2SC1845-E
Q5000 Q5010 +1.1V
R5000 C5010 R5020 0V 0V
+
1K 47/50 330
R5040
Q5050
-51.2V
2.2K 2SC1845-E
-51.8V
-1.0V
-55.5V
Front R ch
+55.3V
2SC1845-E
2SC1845-E
Q5001 Q5011
+1.1V
C5011
R5001 R5021 0V 0V
+
1K 47/50 330
R5041
-51.2V Q5051
2SC1845-E
2.2K
-51.8V
-1.0V
-55.5V
Center ch
+55.3V
2SC1845-E
2SC1845-E +1.1V
Q5002 Q5012
R5002 C5012 0V
R5022 0V
+
1K 47/50 330
R5042
-51.2V Q5052
2SC1845-E
2.2K
-51.8V
-1.0V
-55.5V
D E
TO NAAF-8678
SD-1:D5
P5503A P5004A
+56.5V
Q5030
2SA949Y
120K
R5030
NFL 1
2
R5230 -B1L
120K +B1L 3
B+L 4
B-L 5
Q5040
2SC2229-Y
-56.5V
+56.5V
Q5031
2SA949Y
120K
R5031
NFR 1
-B1R 2
R5231
120K +B1R 3
B+R 4
B-R 5
Q5041
2SC2229-Y
-56.5V
+56.5V
Q5032
2SA949Y
120K
R5032
NFC 1
-B1C 2
R5232
120K +B1C 3
B+C 4
B-C 5
Q5042
2SC2229-Y
-56.5V
F G
Surround L ch
+56.5V
+55.3V
Q5033
2SA949Y
2SC1845-E +1.1V
2SC1845-E
120K
Q5003 Q5013
R5033
R5003 C5013 R5023 0V 0V
+
1K 47/50 330 R5233
120K
R5043
-51.2V Q5053
2.2K 2SC1845-E
-51.8V -1.0V
-55.5V
Q5043
2SC2229-Y
-56.5V
Surround R ch
+56.5V
+55.3V
Q5034
2SA949Y
2SC1845-E 2SC1845-E
+1.1V
120K
Q5004 Q5014
R5034
R5004 C5014 R5024 0V
0V
+
1K 47/50 330 R5234
120K
R5044
-51.2V Q5054
2.2K 2SC1845-E
-51.8V
-1.0V
-55.5V
Q5044
2SC2229-Y
-56.5V
Surround Back
+56.5V
L ch
+55.3V
Q5035
2SA949Y
2SC1845-E 2SC1845-E
+1.1V
120K
Q5005 Q5015
R5035
R5005 C5015
R5025 0V 0V
+
1K 330 R5235
47/50
120K
R5045
Q5055
-51.2V
2.2K 2SC1845-E
-51.8V
-1.0V
-55.5V
Q5045
2SC2229-Y
-56.5V
Surround Back
+56.5V
R ch
+55.3V
Q5036
2SA949Y
2SC1845-E 2SC1845-E
+1.1V
Q5006 120K
Q5016
R5036
R5006 C5016 R5026 0V 0V
+
47/50
1K 330 R5236
120K
R5046
-51.2V Q5056
2SC1845-E
2.2K
-51.8V
-1.0V
-55.5V
Q5046
2SC2229-Y
-56.5V
TX-SR804/804E
H
NFSL 1
-B1SL 2
+B1SL 3
B+SL 4
B-SL 5
1
NFSR
-B1SR 2
+B1SR 3
B+SR 4
B-SR 5
NFSBL 1
-B1SBL 2
+B1SBL 3
B+SBL
4
B-SBL 5
NFSBR 1
-B1SBR 2
+B1SBR 3
B+SBR 4
B-SBR 5