Onkyo HTR-550 Service Manual page 13

A B
SCHEMATIC DIAGRAMS-2
POWER AMPLIFIER SECTION
NOTE
THE COMPONENTS IDENTIFIED BY MARK ! ARE CRITICAL FOR SAFETY
REPLACE ONLY WITH PART NUMBER SPECIFIED.
1
VOLTAGE (MEASURED WITH VOLTMETER) IS DC VOLTAGE.(NO INPUT SIGNAL).
ALL PNP TRANSISTORS ARE EQUIVALENT TO 2SA1015-GR UNLESS OTHERWISE NOTED.
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.
<Note>
NC = No mount of parts.
SD-Z : XY
Location of connected terminal in schematic diagrams.
SD-Z = Schematic diagrams-Z. X = A to H, Y = 1 to 5.
FRONT Lch
FRONT Rch
2
Refer to following table about the parts displayed by mark "LIST".
Q6050 - 6052 Q6053- 6056 Q6060- 6062 Q6063 - 6066
2SC5242 2SC5242 2SA1962 2SA1962
VOLH
SEC1H
To NAAF-8779(1/2)
GNDS1
(SD-1 : H1) +22V
PROTECT
R6701
22K
3 Q6703
Q6702
2SA1163-BL
2SC2712-GR
4
NAPS-8780
P6903B
U02 S1H+
TRANS. SEC. TERMINAL
PC BOARD
P6904B
P6903B(YEW)
S1H-
4 1
3
2
F6901
P6900B(BLK) 2 !
3
10A 125V
1 4
5
P6904B(GRN) ! F6902
10A 125V
C
NAAF-8779(2/2)
U01 AMPLIFIER PC BOARD
C
+50.5V
R5000 C5010
R5020
+ 0V
1K 47/50 330
-46.5V
L
+50.5V
R5001 C5011
R5021
+ 0V
1K 47/50 330
-46.5V
R
+50.5V
R5002 C5012 R5022
0V
+
330
1K 47/50
-46.5V
R6902
To P6901B
1K
Q6707
P6901A
GND
2SC2712-GR
D6901
+65V
4 1 D10XB60H
C6901
10000u/69V
!
3 2
RL6901
1
3 2 4
!
RL6902
4 1
C6902
D6903
10000u/69V
S1L+ D10XB60H
-65V
2
1 P6902A
4
To P6902B
3
S1L-
To NAVD-9178(2/2)
From Audio I/O
(SD-6 : E1)
(PART 3)
D E
To P6901A To P6902A
P6901B
R5180
+65V
+B1C
10 (1/4W)
+1.1V R6020
+BC Q6030
2SC5171 IPRO
2.2 !
(1/4W) R6080
+1.0V 0.22
Q6050
(1/4W)
LIST
+0.6V Q6070
2SC2240
R6140
22K
R5030
120K
-0.3V
NFC SPC
P6080
R5230 R6100
2
120K ID+ 0.22(2W)
1
ID-
IDLING
!
ADJUST
R6090
0.22
R6040 Q6060
(1/4W)
2K
LIST
-0.6V
-0.4V
R6170
VPRO
47K R6180
VOLH
Q5040 D6000 47K
-BC
KDS4148U
2SC2229-Y
-1.1V
Q6040
2SA1930
R5190
10 (1/4W)
-65V
-B1C
R5181
+B1L +65V
10 (1/4W)
R6021
+1.1V +BL Q6031
2SC5171
! IPRO
2.2
R6081
(1/4W)
1.0V 0.22
Q6051
(1/4W)
LIST
+0.6V
Q6071
2SC2240
R6141
22K
R5031
120K
-0.3V
NFL SPL
P6081
R5231 R6101
2
120K
ID+ 0.22(2W)
1
ID-
IDLING
ADJUST !
R6091
0.22
R6041
(1/4W) Q6061
2K
LIST
-0.6V
-0.4V
R6171
VPRO
47K R6181
VOLH
47K
Q5041 -BL D6001
KDS4148U
2SC2229-Y
-1.1V
Q6041
2SA1930
R5191
10 (1/4W)
-65V
-B1L
R5182 +65V
+B1R
10 (1/4W)
R6022
+ 1.1V +BR Q6032
2SC5171
2.2 ! IPRO
(1/4W) R6082
+1.0V 0.22
Q6052
(1/4W)
LIST
+0.6V
Q6072
2SC2240
R6142
22K
R5032
120K
-0.3V
NFR SPR
P6082 R6102
R5232
2
120K 0.22(2W)
ID+
1
ID-
IDLING
!
ADJUST
R6092
0.22
R6042
Q6062
(1/4W)
2K
-0.6V LIST
-0.4V
R6172
VPRO
47K R6182
VOLH
D6002 47K
-BR
Q5042
KDS4148U
2SC2229-Y -1.1V
Q6042
2SA1930
R5192
10 (1/4W) -65V
-B1R
To NAAF-8779(1/2)
(SD-1 : H5)
P6911B
JL6603A
To NAVD-9178(2/2)
(SD-6 : A2)
JL6600A
1 SPC
2 SPL
3 SPR
4 SPSL
5 SPSR
6 SPSBL
7 SPSBR
F G
P6902B
R5183
+B1SL
SL
10 (1/4W)
+1.1V R6023
+BSL
2.2
+50.5V (1/4W)
+1.0V
+0.6V
R5033
120K
-0.3V
R5003 C5013 R5023 0V
+ NFSL
1K 47/50 330 R5233
120K
IDLING
ADJUST
R6043
2K
-46.5V
-0.6V
-0.4V
Q5043
-BSL
2SC2229-Y
-1.1V
Q6043
2SA1930
R5193
10 (1/4W)
-B1SL
R5184
+B1SR
SR
10 (1/4W)
R6024
+1.1V +BSR
2.2
+50.5V
(1/4W)
+1.0V
+0.6V
R5034
120K
-0.3V
R5004 C5014 R5024
0V
+ NFSR
1K 47/50 330 R5234
120K
IDLING
ADJUST
R6044
2K
-46.5V
-0.6V
-0.4V
Q5044
-BSR
2SC2229-Y
-1.1V
Q6044
2SA1930
R5194
10 (1/4W)
-B1SR
R5185
+B1SBL
SBL
10 (1/4W)
R6025
+1.1V +BSBL
2.2
+50.5V] (1/4W)
+1.0V
+0.6V
R5035
120K
-0.3V
R5005 C5015 R5025
0V NFSBL
+
1K 47/50 330 R5235
120K
IDLING
ADJUST
R6045
-46.5V 2K
-0.6V
-0.4V
Q5045 -BSBL
2SC2229-Y
-1.1V
Q6045
2SA1930
R5195
10 (1/4W)
-B1SBL
R5186
+B1SBR
SBR 10 (1/4W)
+1.1V R6026
+BSBR
2.2
+50.5V
(1/4W)
+1.0V
+0.6V
R5036
120K -0.3V
R5006 C5016 R5026 0V
NFSBR
+
1K 47/50 330 R5236
120K
IDLING
ADJUST
R6046
2K
-0.6V
-46.5V -0.4V
-BSBR
Q5046
2SC2229-Y
-1.1V
Q6046
2SA1930
R5196
10 (1/4W)
-B1SBR
VOLH
IPRO
VPRO
HT-R550
H
+65V
Q6033
2SC5171
IPRO
!
R6083
0.22
Q6053
(1/4W)
LIST
Q6073
2SC2240
R6143
22K
SPSL
P6083
R6103
2
ID+ 0.22(2W)
1
ID-
R6093 !
0.22
(1/4W) Q6063
LIST
R6173
VPRO
47K R6183
VOLH
47K
D6003
KDS4148U
-65V
+65V
Q6034
2SC5171 IPRO
!
R6084
0.22
Q6054
(1/4W)
LIST
Q6074
2SC2240
R6144
22K
SPSR
P6084
R6104
2
0.22(2W)
ID+
1
ID-
!
R6094
0.22
Q6064
(1/4W)
LIST
R6174
VPRO
47K R6184
VOLH
47K
D6004
KDS4148U
-65V
+65V
Q6035
2SC5171
IPRO
!
R6085
0.22
Q6055
(1/4W)
LIST
Q6075
2SC2240
R6145
22K
SPSBL
P6085
2 R6105
ID+ 0.22(2W)
1
ID-
!
R6095
0.22
(1/4W) Q6065
LIST
R6175 VPRO
47K R6185
VOLH
D6005 47K
KDS4148U
-65V
Q6036
2SC5171
! IPRO
R6086
0.22
Q6056
(1/4W)
LIST
Q6076
R6146
2SC2240
22K
SPSBR
P6086
R6106
2
ID+ 0.22(2W)
1
ID-
!
R6096
0.22
(1/4W) Q6066
LIST
R6176
VPRO
47K R6186
VOLH
D6006 47K
KDS4148U