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A
B
SCHEMATIC DIAGRAMS - 6
AMP (VOLTAGE AMP) SECTION
Q Q
3 7 6 3 1 5 1 5 0
U0011
BACLA-0445
1
POWER AMP. BOARD
NOTE
!
THE COMPONENTS IDENTIFIED BY MARK
ARE CRITICAL FOR SAFETY.
REPLACE ONLY WITH PART NUMBER SPECIFIED.
BOLD 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 1/6 WATT UNLESS OTHERWISE NOTED.
THE THICK LINES ON PC BOARD ARE THE PRINTING SIDE OF THE PARTS.
EX)
PRINTING SIDE
"NM" AND "NC" ARE SHORT FOR "NOT MOUNTED" AND "NOT CONNECTED",
WHICH MEANS NO PART IS MOUNTED ON WIRING PATTERN OF PCB.
2
CIRCUIT IS SUBJECT TO CHANGE FOR IMPROVEMENT.
+60.5V
FL
3
C5010
R5000
47/50(UTSP)
3
R5020
2
1.5K
330
-0.9V
R5040
1K
4
-55.1V
T E
L
1 3 9 4 2 2 9 6 5 1 3
-60.5V
+60.5V
SL
5
C5013
R5003
47/50(UTSP)
3
R5023
2
1.5K
330
-0.9V
R5043
1K
-55.1V
6
-60.5V
+60.5V
SBL
7
C5015
R5005
47/50(UTSP)
3
R5025
2
1.5K
330
-0.9V
R5045
1K
w w w
-55.1V
8
-60.5V
4
3
2
1
E6008B
NTM-1P233(M1969)
C
D
IDLING CURRENT ADJUSTMENT
1. Wait for 4 - 6 minutes after power on. (Heat running)
2. Re-adjust the trimming resistors according to the following values.
Adjustment point
Measured value
Re-adjustment value
R5440 ~ R5446
In case below 4 mV
4 mV
In case 4 - 6 mV
No re-adjustment
In case over 6mV
6 mV
R5180
+B1L
10
(1/4W)
+58.5V
R5420
+BL
1
10
(1/4W)
+1.0V
+58.0V
18
R5030
33K
(1/4W)
0V
-0.2V
R5360
18
-0.3V
(1/4W)
-1.0V
-58.7V
2
3
R5190
-B1L
10
(1/4W)
R5183
+B1SL
10
(1/4W)
+58.5V
R5423
+BSL
1
10
(1/4W)
+1.0V
+58.0V
18
R5033
33K
(1/4W)
0V
-0.2V
R5363
18
-0.3V
(1/4W)
-1.0V
-58.7V
2
3
R5193
-B1SL
10
(1/4W)
R5185
+B1SBL
10
(1/4W)
+58.5V
R5425
+BSBL
1
10
(1/4W)
+1.0V
+58.0V
18
R5035
33K
(1/4W)
0V
-0.2V
R5365
18
-0.3V
(1/4W)
x
a o
-1.0V
y
.
i
-58.7V
2
3
R5195
-B1SBL
10
(1/4W)
http://www.xiaoyu163.com
E
F
NOTE:
XY in "SCHEMATIC-a / PART-b:XY" indicates the target
location of the plug or socket, X=A to E/H/K, Y=1 to 4/5/8.
C
C5012
R5002
47/50(UTSP)
3
2
1.5K
FR
L5400
5597-45502
NFL
1
+B1L
4
R5350
R5480
-B1L
5
C5011
10
+BL
6
+0.6V
R5001
47/50(UTSP)
+BL2
7
3
-BL2
8
2
1.5K
TRIML
9
-0.6V
R5490
10
L5410
5597-45502
Q
Q
3
7
6
SR
L5403
5597-45502
NFSL
1
+B1SL
4
R5353
R5483
-B1SL
5
C5014
10
+BSL
6
+0.6V
R5004
47/50(UTSP)
+BSL2
7
3
-BSL2
8
2
1.5K
TRIMSL
9
-0.6V
R5493
10
L5413
5597-45502
SBR
L5405
5597-45502
NFSBL
1
+B1SBL
4
R5355
R5485
-B1SBL
5
C5016
10
+BSBL
6
+0.6V
R5006
47/50(UTSP)
+BSBL2
7
3
-BSBL2
8
2
1.5K
TRIMSBL
9
-0.6V
R5495
10
L5415
5597-45502
u 1 6 3
.
P6007B
NSCT-3P2183
TX-NR708, TX-NA708, HT-RC270, DTR-40.2
G
H
8
9
2
4
9
R5182
+60.5V
10
(1/4W)
+58.5V
+BC
1
+1.0V
+58.0V
R5032
33K
R5022
330
0V
-0.2V
-0.9V
R5042
-0.3V
1K
-55.1V
-1.0V
-58.7V
2
3
R5192
-60.5V
10
(1/4W)
R5181
+60.5V
10
(1/4W)
+58.5V
+BR
1
+1.0V
+58.0V
R5031
33K
R5021
330
0V
-0.2V
-0.9V
R5041
-0.3V
1K
-55.1V
-1.0V
-58.7V
2
3
3
1
5
1
5
0
8
9
2
R5191
-60.5V
10
(1/4W)
R5184
+60.5V
10
(1/4W)
+58.5V
+BSR
1
+1.0V
+58.0V
R5034
33K
R5024
330
0V
-0.2V
-0.9V
R5044
-0.3V
1K
-55.1V
-1.0V
-58.7V
2
3
R5194
-60.5V
10
(1/4W)
R5186
+60.5V
10
(1/4W)
+58.5V
+BSBR
1
+1.0V
+58.0V
R5036
33K
R5026
330
0V
-0.2V
-0.9V
R5046
-0.3V
1K
m
-55.1V
c o
-1.0V
-58.7V
2
3
R5196
-60.5V
10
(1/4W)
I
J
K
8
2
9
9
+B1C
R5422
L5402
10
5597-45502
NFC
1
(1/4W)
+B1C
4
R5352
R5482
-B1C
5
10
+BC
6
18
+0.6V
(1/4W)
+BC2
7
-BC2
8
TRIMC
9
R5362
-0.6V
R5492
18
10
(1/4W)
L5412
5597-45502
-B1C
+B1R
R5421
L5401
10
5597-45502
NFR
1
(1/4W)
+B1R
4
R5351
R5481
-B1R
5
10
+BR
6
18
+0.6V
(1/4W)
+BR2
7
-BR2
8
TRIMR
9
R5361
-0.6V
R5491
18
10
(1/4W)
L5411
5597-45502
4
9
8
2
9
9
-B1R
+B1SR
R5424
L5404
10
5597-45502
NFSR
1
(1/4W)
+B1SR
4
R5354
R5484
-B1SR
5
10
+BSR
6
18
+0.6V
(1/4W)
+BSR2
7
-BSR2
8
TRIMSR
9
R5364
-0.6V
R5494
18
10
(1/4W)
L5414
5597-45502
-B1SR
+B1SBR
R5426
L5406
10
5597-45502
NFSBR
1
(1/4W)
+B1SBR
4
R5356
R5486
-B1SBR
5
10
+BSBR
6
18
+0.6V
(1/4W)
+BSBR2
7
-BSBR2
8
TRIMSBR
9
R5366
-0.6V
R5496
18
10
(1/4W)
L5416
5597-45502
-B1SBR
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