Amp Class-A Section - Onkyo TX-NR525 Service Manual

A B
SCHEMATIC DIAGRAMS-06(PART-6)

AMP CLASS-A SECTION

1
ADJUSTMENT OF IDLING CURRENT
[NOTES]
1. Set R6040 - 6046(TX-NR525/HT-RC550 are R6040-6044) to minimum position before POWER ON.
2. Equip series 1/4W 100-ohm resisters near the terminal respectively in the each poles of the jig
used for P6080 - 6086(TX-NR525/HT-RC550 are P6080-6084) terminals.
[PROCEDURES]
a. Set the voltages at P6080 - 6082 to 2.5mV by adjusting R6040 - 6042, under the condition of
no input and no load, immediately after POWER ON.
b. Set the voltages at P6083-6086(TX-NR525/HT-RC550 are P6083-6084) to 1.5mV by adjusting
R6043 - 6046(TX-NR525/HT-RC550 are R6043 - 6044), under the condition of no input and no load,
immediately after POWER ON.
c. Re-adjust by following procedure after 5 minutes of heat running.
L/ C/ R
Below 9 mV 9 mV
2
Between 9 - 11 mV Leave it as it is.
Over 11 mV 11mV
SL/ SR/ SBL/ SBR
Below 6 mV 6 mV
Between 6 - 8 mV Leave it as it is.
Over 8 mV 8 mV
3
4
5
C D
BACLA-1318
CLASS A
U0030
AMP(CLASS A) PC BOARD
R5160-5166
R5170-5176
R5200-5206
R5130-5136
FL
3
E
Q5030
2 B INA6006AP1-T111-1W
C
1
C5010
Q5000 Q5010 (1/4W)
1 1
47uF50V
R5000 R5020 C C R5030
2 B B 2
2.2k 330 56k
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 (1/4W)
1 1
47uF 50V
R5001 R5021 C C R5031
2 B B 2
2.2k 330 56k
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 (1/4W)
47uF 50V C C
R5002 R5022 R5032
2 B B 2
2.2k
330 56k
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
TX-NR525(-1B)
HT-R592(-1A)
HT-RC550
220 150
39K 33K
R5180
10
(1/4W)
1
C
R6020 Q6030
2 B
2SC5171(ONK_Q)
2.2 E
3
(1/4W)
NFL
GNDIN_FL
IN_FL
+B1L
-B1L
+BL
+BL2
-BL2
TRIML
3
E
R5290
2 B
10k
C
1
1
C
2 B
E
3
3
E
Q6040
2 B 2SA1930(ONK_Q)
C
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
-B1R
+BR
+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
(1/4W) 3
NFC
GNDIN_C
IN_C
+B1C
-B1C
+BC
+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)
TX-NR525/ HT-R592/HT-RC550
F G
R5183
10 (1/4W)
SL
3
E
Q5033
2 B INA6006AP1-T111-1W
C
1
C5013 Q5003
1 1 Q5013 (1/4W)
47uF50V C C
R5003 R5023 R5033
2 B B 2
2.2k 330 56k
E E
3 3
R5043
R5293
1.8k
10k
1
Q5053
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
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
R5294
1.8k
10k
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
HT-R592 only *R5185
10
(1/4W)
SBL
3
E
*Q5035
2 B INA6006AP1-T111-1W
C
1
*C5015 *Q5005 *Q5015
(1/4W)
1 1
47uF50V
*R5005 *R5025 C C *R5035
2 B B 2
2.2k 330 56k
E E
3 3
*R5045
*R5295
1.8k
10k
1
1 C
C 2 B
*Q5055
2 B
2SC2412K-R E
E 3
3
1
C
2 B
*Q5045
E
INC6006AP1-T111-1W
3
(1/4W)
*R5195 10
*R5186
HT-R592 only
SBR
10 (1/4W)
3
E
*Q5036
2 B INA6006AP1-T111-1W
C
1
*C5016 *Q5006 *Q5016
(1/4W)
1 1
47uF50V
*R5006 *R5026 C C *R5036
2 B B 2
2.2k 330 56k
E E
3 3
*R5046
*R5296
1.8k
10k
1
1 C
C *Q5056 2 B
2 B
2SC2412K-R
E
E 3
3
1
C
*Q5046
2 B
E INC6006AP1-T111-1W
3
(1/4W)
*R5196 10
Model No. HT-R592/ TX-NR525/ HT-RC550(PART-6)
H
(1/4W)
1
R6023 C
Q6033
2 B
2SC5171(ONK_Q)
2.2
E
3
NFSL
GNDIN_SL
IN_SL
+B1SL
-B1SL
+BSL
+BSL2
-BSL2
TRIMSL
3
E
2 B
C
1
3
E
Q6043
2 B 2SA1930(ONK_Q)
C
1
(1/4W) 1
C
R6024 Q6034
2 B
2.2 2SC5171(ONK_Q)
E
3
NFSR
GNDIN_SR
IN_SR
+B1SR
-B1SR
+BSR
+BSR2
-BSR2
TRIMSR
3
E
2 B
C
1
3
E
Q6044
2 B
C 2SA1930(ONK_Q)
1
1
*R6025 C
*Q6035
2 B
2SC5171(ONK_Q)
2.2 E
3
(1/4W)
NFSBL
GNDIN_SBL
IN_SBL
+B1SBL
-B1SBL
+BSBL
+BSBL2
-BSBL2
TRIMSBL
3
E
2 B
C
1
3
E
*Q6045
2 B
2SA1930(ONK_Q)
C
1
(1/4W)
1
*Q6036
*R6026 C
2 B
2SC5171(ONK_Q)
2.2
E
3
NFSBR
GNDIN_SBR
IN_SBR
+B1SBR
-B1SBR
+BSBR
+BSBR2
-BSBR2
TRIMSBR
3
E
2 B
C
1
3
E
*Q6046
2 B 2SA1930(ONK_Q)
C
1