Onkyo TX-8020B Service Manual page 11

A B
SCHEMATIC DIAGRAMS-03(PART-3)
AMP(CLASS-A) SECTION
1
2
3
4
5
C D
Model No. TX-8020 SCHEMATIC DIAGRAM (PART-3)
BACLA-1318-2
U0020 AMP(CLASS A) PC BOARD
CLASS A
R5160-5166
R5170-5176
R5200-5206
R5130-5136
TX-8020
R530*,R531*:150 33
R516*,R517*:220 120
R520*,R513*:39k 22k
FL
3
E
Q5030
2 B INA6006AP1-T111-1W
C
1
C5010 Q5000 Q5010
1 1
47u 50V C C
R5000 R5020
2 B B 2
2.2k 330
E E
3 3
R5040
1.8k
1
C
Q5050
2 B
2SC2412K-R
E
3
1
C
2 B Q5040
INC6006AP1-T111-1W
E
3
FR
3
E
Q5031
2 B INA6006AP1-T111-1W
C
1
C5011
Q5001 Q5011
1 1
47uF 50V
R5001 R5021 C C
2 B B 2
2.2k 330 E E
3 3
R5041
1.8k
1
C
2 B Q5051
2SC2412K-R
E
3
1
C
2 B Q5041
INC6006AP1-T111-1W
E
3
C
3
E
Q5032
2 B INA6006AP1-T111-1W
C
1
C5012 Q5002 Q5012
1 1
47uF 50V
R5002 R5022 C C
2 B B 2
2.2k
330
E E
3 3
R5042
1.8k
1
C
Q5052
2 B
2SC2412K-R
E
3
1
C
2 B Q5042
INC6006AP1-T111-1W
E
3
1 2 3 4
P5509B
NTM-1P233(M1969)
E F
TX-NR525(-1B)
HT-R592(-1A)
HT-RC550
FR
220 150
39K 33K
R5180
10
(1/4W)
1
R6020 C
Q6030
2 B
2.2 KTD2061-Y
E
3
(1/4W)
NFL
GNDIN_FL
IN_FL
+B1L
-B1L
(1/4W)
R5030 +BL
+BL2
56k
IDLING
-BL2
ADJUST
TRIML
3
E
R5290
2 B
10k
C
1
1
C
2 B
E
3
3
E
Q6040
2 B
C KTB1369-Y
1
(1/4W)
R5190 10
R5181
10 (1/4W)
Q6031
1
R6021 C
2 B
2.2
E
(1/4W)
3
2SC5171(ONK_Q)
NFR
GNDIN_FR
IN_FR
+B1R
(1/4W) -B1R
R5031
+BR
56k +BR2
-BR2
TRIMR
3
R5291 E
2 B
10k C
1
1
C
2 B
E
3
3
E
Q6041
2 B 2SA1930(ONK_Q)
C
1
(1/4W)
R5191 10
R5182
10 (1/4W)
1
R6022 C
Q6032
2 B
2SC5171(ONK_Q)
2.2
E
3
(1/4W)
NFC
GNDIN_C
IN_C
+B1C
(1/4W) -B1C
R5032
+BC
56k +BC2
-BC2
TRIMC
3
R5292 E
2 B
10k
C
1
1
C
2 B
E
3
3
E
Q6042
2 B
2SA1930(ONK_Q)
C
1
(1/4W)
R5192 10
1 2 3 4
P5507B
NTM-1P233(M1969)
G
R5183
10 (1/4W)
(1/4W)
SL R6023
2.2
3
E
Q5033
2 B INA6006AP1-T111-1W
C
1
C5013 Q5003 (1/4W)
1 1 Q5013
47u 50V
R5003 R5023 C C R5033
2 B B 2
2.2k 330 56k
E E
IDLING
3 3
ADJUST
R5043 3
R5293 E
1.8k
2 B
10k
C
1
Q5053 1
1 C
C 2 B
2SC2412K-R
2 B
E
E 3
3
1
C
2 B Q5043
INC6006AP1-T111-1W
E
3
(1/4W)
R5193 10
R5184
10
(1/4W)
SR (1/4W)
R6024
2.2
3
E
Q5034
2 B INA6006AP1-T111-1W
C
1
C5014 Q5004
(1/4W)
1 1 Q5014
47uF50V
R5004 R5024 C C R5034
2 B B 2
2.2k 330 E E 56k
3 3
R5044 3
R5294 E
1.8k 2 B
10k C
1
1
Q5054 1 C
C 2 B
2 B
2SC2412K-R
E
E 3
3
1
C
2 B Q5044
INC6006AP1-T111-1W
E
3
(1/4W)
R5194 10
*R5185
@value (1/4W)
SBL
*R6025
@value
(1/4W)
3
E
*Q5035
2 B @Ratin
C
1
*C5015 *Q5005 *Q5015
(1/4W)
1 1
@value 50V
*R5005 *R5025 C C *R5035
2 B B 2
@value @value @value
E E
3 3
*R5045 3
*R5295 E
@value 2 B
@value
C
1
1
1 C
C 2 B
*Q5055
2 B
@Ratin E
E 3
3
1
C
2 B
*Q5045
E
@Ratin
3
(1/4W)
*R5195 @ value
*R5186
@value
(1/4W)
(1/4W)
SBR
*R6026
@value
3
E
*Q5036
2 B @Ratin
C
1
*C5016 *Q5006 *Q5016
1 1 (1/4W)
@value 50V C C
*R5006 *R5026 *R5036
2 B B 2
@value @value @value
E E
3 3
3
*R5046
E
*R5296
@value
2 B
@value
C
1
1
1 C
C *Q5056 2 B
2 B
@Ratin
E
E 3
3
1
C
*Q5046
2 B
E @Ratin
3
(1/4W)
*R5196 @ value
TX-8020
H
1
C
Q6033
2 B
KTD2061-Y
E
3
NFSL
GNDIN_SL
IN_SL
+B1SL
-B1SL
+BSL
+BSL2
-BSL2
TRIMSL
3
E
Q6043
2 B
KTB1369-Y
C
1
1
C
Q6034
2 B
2SC5171(ONK_Q)
E
3
NFSR
GNDIN_SR
IN_SR
+B1SR
-B1SR
+BSR
+BSR2
-BSR2
TRIMSR
3
E
Q6044
2 B
C 2SA1930(ONK_Q)
1
1
C
*Q6035
2 B
@Ratin
E
3
NFSBL
GNDIN_SBL
IN_SBL
+B1SBL
-B1SBL
+BSBL
+BSBL2
-BSBL2
TRIMSBL
3
E
*Q6045
2 B
@Ratin
C
1
1
*Q6036
C
2 B
@Ratin
E
3
NFSBR
GNDIN_SBR
IN_SBR
+B1SBR
-B1SBR
+BSBR
+BSBR2
-BSBR2
TRIMSBR
3
E
*Q6046
2 B @Ratin
C
1
1