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A
B
SCHEMATIC DIAGRAMS-06(PART-6)
AMP CLASS-A SECTION
ADJUSTMENT OF IDLING CURRENT
1
[NOTES]
1. Set R5440-5442 and 6043-6046 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 terminals.
[PROCEDURES]
a. Set the voltages at P6080 - 6082 to 6.0 mV by adjusting R5440 - 5442, under the condition of
no input and no load, immediately after POWER ON.
b. Set the voltages at P6083 - 6086 to 4.0 mV by adjusting R6043 - 6046, 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
Between 9 - 11 mV
Leave it as it is.
2
Over
11 mV
11mV
SL/ SR/ SBL(SW)/ SBR
Below
6 mV
6 mV
Between 6 - 8 mV
Leave it as it is.
Over
8 mV
8 mV
BAAMP-1367
U0020
TRANSISTOR PC BOARD
3
Q5510
Q5500
2SA1200-Y(2LONK,ZE)
2SA1200-Y(2LONK,ZE)
Q5520
Q5530
2SC2880-Y(2LONK,ZE)
2SC2880-Y(2LONK,ZE)
4
<NOTE>
This PCB ASS'Y is mounted 3pcs.
5
C
CLASS-A
BACLA-1328
U0030
AMP(CLASS A) PC BOARD
L
Q5030
Q5040
Q5000
(1/4W)
Q5010
C5010 47u 50V
R5030
R5000
R5020
330
2.2k
R5040
1.8k
Q5050
2SC2713-BL
SL
Q5063
Q5033
2SA1200-Y(2LONK,ZE)
Q5043
Q5003
Q5013
C5013 47u 50V
R5003
R5023
2.2k
330
R5043
1k
Q5053
2SC2713-BL
Q5073
2SC2880-Y(2LONK,ZE)
SBL
Q5065
Q5035
C5015
Q5005
Q5015
(1/4W)
47u 50V
Q5045
R5005
R5025
R5035
2.2k
330
R5045
1k
Q5055
2SC2713-BL
Q5075
2SC2880-Y(2LONK,ZE)
4
3
2
1
P6007A
NTM-1P233(M1969)
D
E
R5180
(1/4W)
10
Q5250
2SA1930(ONK_Q)
NFL
Q5430
R5420
2SC2880-Y(2LONK,ZE)
GNDIN_L
L5400
10
(1/4W)
IN_L
+B1L
R5480
-B1L
10
+BL
+BL2
56k
-BL2
TRIML
R5490
10
L5410
Q5440
Q5260
R5190 10
(1/4W)
R5183
10
(1/4W)
Q5253
2SA1930(ONK_Q)
NFSL
R5423
Q5433
2SC2880-Y(2LONK,ZE)
GNDIN_SL
10
(1/4W)
L5403
IN_SL
+B1SL
R5483
-B1SL
(1/4W)
10
+BSL
R5033
+BSL2
33k
-BSL2
TRIMSL
R5493
10
L5413
-0.5V
Q5443
Q5263
2SC5171(ONK_Q)
(1/4W)
R5193 10
R5185
10
(1/4W)
Q5255
2SA1930(ONK_Q)
NFSBL
R5425
Q5435
2SC2880-Y(2LONK,ZE)
GNDIN_SBL
10
(1/4W)
IN_SBL
L5405
+B1SBL
R5485
-B1SBL
10
+BSBL
+BSBL2
33k
-BSBL2
TRIMSBL
R5495
10
L5415
Q5445
Q5265
2SC5171(ONK_Q)
R5195 10
(1/4W)
4
3
P6008A
NTM-1P233(M1969)
F
G
C
Q5032
Q5042
C5012
Q5002
Q5012
(1/4W)
47u 50V
R5002
R5022
R5032
2.2k
330
56k
R5042
1.8k
Q5052
2SC2713-BL
R
Q5031
Q5041
C5011
Q5001
Q5011
(1/4W)
47u 50V
R5001
R5021
R5031
-0.1V
56k
2.2k
330
R5041
1.8k
Q5051
2SC2713-BL
SR
Q5064
2SA1200-Y(2LONK,ZE)
Q5034
Q5044
C5014
(1/4W)
Q5004
Q5014
47u 50V
R5004
R5024
R5034
2.2k
330
33k
R5044
1k
Q5054
2SC2713-BL
Q5074
2SC2880-Y(2LONK,ZE)
SBR
Q5066
Q5036
2SA1200-Y(2LONK,ZE)
3
E
2
B
Q5046
3
C
E
1
2
B
C5016
C
Q5006
Q5016
(1/4W)
1
47u 50V
R5006
R5026
R5036
330
2.2k
33k
R5046
1k
Q5056
2SC2713-BL
Q5076
2SC2880-Y(2LONK,ZE)
2
1
TX-NR727/828/ DTR-40.5/50.5
H
R5182 10
(1/4W)
Q5252
2SA1930(ONK_Q)
NFC
Q5432
GNDIN_C
2SC2880-Y(2LONK,ZE)
R5422
L5402
IN_C
10
+B1C
(1/4W)
R5482
0.6V
-B1C
10
+BC
+BC2
-BC2
TRIMC
R5492
-0.5V
10
L5412
Q5442
Q5262
2SC5171(ONK_Q)
R5192 10
(1/4W)
R5181 10
(1/4W)
Q5251
2SA1930(ONK_Q)
NFR
Q5431
R5421
2SC2880-Y(2LONK,ZE)
GNDIN_R
10
L5401
(1/4W)
IN_R
+B1R
R5481
0.6V
-B1R
10
+BR
+BR2
-BR2
TRIMR
R5491
-0.5V
10
L5411
Q5441
Q5261
2SC5171(ONK_Q)
R5191 10
(1/4W)
R5184
10
(1/4W)
Q5254
2SA1930(ONK_Q)
NFSR
R5424
Q5434
GNDIN_SR
2SC2880-Y(2LONK,ZE)
10
IN_SR
(1/4W)
L5404
+B1SR
R5484
0.6V
-B1SR
10
+BSR
+BSR2
-BSR2
TRIMSR
R5494
-0.5V
10
L5414
Q5444
2SA1200-Y(2LONK,ZE)
1
Q5264
2SC5171(ONK_Q)
(1/4W)
R5194 10
R5186
10
(1/4W)
Q5256
2SA1930(ONK_Q)
NFSBR
R5426
Q5436
GNDIN_SBR
10
2SC2880-Y(2LONK,ZE)
(1/4W)
L5406
IN_SBR
+B1SBR
R5486
0.6V
0.6V
-B1SBR
10
+BSBR
+BSBR2
-BSBR2
TRIMSBR
R5496
-0.5V
10
L5416
Q5446
2SA1200-Y(2LONK,ZE)
Q5266
2SC5171(ONK_Q)
(1/4W)
R5196 10
MODEL No.TX-NR727/828/DTR-40.5/50.5(PART-6)
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