TX-8050 / TX8030
SCHMATIC DIAGRAM - 5 (SD - 5)
POWER AMPLIFIER SECTION
TX-8050 / TX8030
A
1
2
3
4
5
B
C
D
E
F
G
H
6
7
8
I
J
K
-BL
+BL
-B1LL
+B1LL
-B1
VPRO
VOLH
+15V
-15V
IPROTECT
VPROTECT
VOLH
SP_B
SP_A
IPRO
-BR
+BR
+B1RR
-B1RR
-B1
+B1
VPRO
VOLH
SP_B
SP_A
+B1
-B1
APOWER
Lch
Rch
APOWER
SEC1H
Lch
SPR
SPL
+B1
+BDG
DGND
SPL
SPR
AC_S1L-_
_
SEC2_1
SEC2_2
FLAC1
FLAC2
SEC3_2
SEC3_1
GND_DIS
FLAC2
VH
FLAC1
GND_DIS
SPOUTL
SPOUTR
SEC1H
AGND
IPRO
+15V
-15V
HEAD PHONE
0V
Av=29dB
-14.5V
-0.65V
L
1.1V
0V
1.1V
-0.4V
-0.3V
1.0V
-0.6V
ID-
ID+
HEATSINK
0V
0V
-15V
+15V
VPROTECT
IPROTECT
VOLH
SP_B
SP_A
VOLH
SP_B
SP_A
IPROTECT
VPROTECT
-15V
+15V
1.1V
1.1V
-0.4V
-0.3V
0.2V
1.0V
0.6V
ID-
ID+
-0.6V
HEATSINK
Av=29dB
R
GND15
27160500
H=50
HeatSink
SPGR
SPGL
SPOUTR
SPOUTL
GRN
YEL
MPOWER
+BSUB
POFF
+BDG
MPOWER
+BSUB
GNDDG
+BDG
POFF
DGND
DGND
5.6V
DGND
0.6V
N.C
P916B(BLK)
FLAC1
FLAC2
SEC3_1
SEC3-2
BAPS0705
for FL
*
*
BAPS-0706
A
B
7.12VAC
138.6mA
6.82VAC
43.39V
0.94mA
0.129W
6.756VAC/FL
25.62V
-25.77V
57.73V
-57.83V
-0.65V
-14.5V
-52.2V
-57.73V
-0.16V
to Trans terminal
to Trans terminal
56.2V
-56.4V
26.65V
-26.82V
11.22V
6.794VAC/FL
6.85VAC
7.173VAC
RED
BLUE
P972B(YEL)
BLK
*
18.4mA
56.6V
64.81V--63.2V
Only for TX-8030
P971B(GRN)
BLUE
RED
200mA
158mA
to I-7
TRANS
terminal
BCAF-0704
SPEAKERS
AorB---4 to 16ohms
A+B---8 to 16ohms
to SD-6 A-2(DG PWB)
from SD-3 D-3 (AUDIO INPUT PWB)
Q5202
2SC2712-GR
Q5203
2SC2712-GR
D5201
KDS4148U
1
2
D5202
KDS4148U
1
2
J928
J927
R5061
33K
C5005
10/50
R5023
1K
R5021
1K
R5019
1.2K
R5017
4.7K
R5015
1K
R5011
100K
R5009
100K
C5003
47/50
R5001
1K
C5001
221K
C5015
101K
C5013
040D
R5035
22K
R5033
22K
R5045
3.3K
R5041
3.9K
R5039
5.6K
R5037
470
Q5013
2SC1740S-S
Q5011
2SC1740S-S
R5057
56K
R5049
(1/4W)
100
Q5017
2SA1930
Q5015
2SC5171
C5101
104Z
Q5101
2SA1163-BL
R5069
47K
R5071
47K
D5003
KDS4148U
C5021 103J
Q5023
2SC2229-Y
R5059
10K
P5001
1
2
RL913
1
5
2
3
4
RL914
5
1
4
3
2
Q5201
2SA1163-BL
R5104
220K
D5101
UDZS3.3B
C5102
1/50
R5062
33K
R5018
4.7K
R5024
1K
R5022
1K
R5020
1.2K
R5016
1K
D5002
MTZJ5.6B
R5012
100K
R5010
100K
C5004
47/50
R5002
1K
C5002
221K
C5016
101K
C5014
040D
R5036
22K
R5034
22K
R5046
3.3K
R5042
3.9K
R5040
5.6K
R5038
470
R5070
47K
R5072
47K
R5058
56K
Q5016
2SC5171
C5006
10/50
Q5018
2SA1930
Q5014
2SC1740S-S
Q5012
2SC1740S-S
D5004
KDS4148U
Q5024
2SC2229-Y
C5022 103J
R5060
10K
P5002
1
2
C914
334
C913
334
Q913
KRC105S
1
R5203
220K
C5201
1/50
J5002
NONE
Q912
79M15
3
O
2
I
1
G
Q914
KRC105S
Q5005
2SC1815-GR
Q5006
2SC1815-GR
Q5007
2SA949-Y
Q5009
2SC2229-Y
Q5008
2SA949-Y
Q5010
2SC2229-Y
R5043
2KB
3
2
1
R5044
2KB
3
2
1
J5001
NONE
Q5301
KRC105S
Q5302
KRC105S
RL912
1
3
2
4
RL911
3
1
4
2
D921
LN15XB60
1
3
4
2
JL503A
1
2
3
4
5
JL503B
5
4
3
2
1
R913
10(1/2W)
J926
NC
J925
NC
J921 NC
J922 NC
TP912
TP911
Q911D
1
2
3
4
R5003
56K
R5004
56K
R5030
56K
R5029
56K
L5001
R5063
22
R5065
22
R5064
22
R5066
22
L5002
D5102
UDZS3.3B
D923
D10XB60H
1
3
4
2
Q5019
2SC5198
Q5021
2SA1941
Q5020
2SC5198
Q5022
2SA1941
R5505
0.22(5W)x2
R5506
0.22(5W)x2
P972B
JL906A
1
2
3
4
5
C919
220/25
C920
220/25
C931
220/25
P955
P954
P950
P951
P952
P953
P956
P957
P958
P959
P960
P961
TP916
TP952
TP953
TP954
TP955
JL951A
1
2
3
4
5
JL953A
1
2
3
R954
8.2K
Q951
2SC2235
D952
UDZS22B
D953
UDZS22B
R955
33K
C953
104J
JL952B
1
2
3
4
5
JL951B
5
4
3
2
1
R5301
10(1/2W)
JL954A
1
2
3
4
5
JL954B
5
4
3
2
1
R921
8.2(1W)
R922
8.2(1W)
C5310
103J
C5305
103J
C5307
103J
C5306
103J
RL501
4
3
6
1
2
5
C5309
103J
P917A
P915A
D5301
1SS133
D5302
1SS133
RL502
4
3
6
1
2
5
P5301
5
3
4
2
1
L
R
P5302
5
3
4
2
1
L
R
C5302
102J
C5301
102J
JL953B
3
2
1
R952
2.2(1/2W)
R5106
NC
R5105
470K
D5203
UDZS3.3B
D954
RL1N4003
C922
10000/16
J929 to E-7
C5103
1/50
P916B
R914
10(1/2W)
D951
RL1N4003
J929A
C917
1000/35
C918
1000/35
D5001
MTZJ5.6B
C5011
22/100
C5009
22/100
R5047
(1/4W)
2.2
R5051
(1/4W)
0.22
R5053
(1/4W)
0.22
R5048
(1/4W)
2.2
R5052
(1/4W)
0.22
C5018
47/50
R5054
(1/4W)
0.22
C5017
47/50
C5019
47/50
R5181
(1/4W)
10
R5027
(1/4W)
100
R5191
(1/4W)
10
C5010
22/100
C5012
22/100
R5026
(1/4W)
100
R5182
(1/4W)
10
R5028
(1/4W)
100
R5192
(1/4W)
10
R5050
(1/4W)
100
C5020
47/50
C5023
473J
R5067
(1W)
8.2
R5101
22K
R5103
47k
R5102
10K
C5024
473J
R5068
(1W)
8.2
C923
102k
D925
1SS133
D922
S1NB60
1
3
4
2
R912
0.22(1/2W)
J923
R911
0.22(1/2W)
C915
104
C916
104
D926
1SS133
C924
102k
C5308
103J
R5202
47K
R5201
10K
C5203
104Z
R5205
NC
C5202
100/50
R951
10(1/2W)
R953
3.3(1/2W)
C952
47/50
C954
104J
C951
220/63(VR)
R5014
2.2K
R5013
2.2K
C5007
220/25
C5008
220/25
R5025
(1/4W)
100
R5204
33K
TP951
P915
1
P917
1
C955
10/50
C956
10/50
C957
10/50
D955
1SS352
R956
10(1/2W)
Q952
78M05
5
3 O
2
G
1
I
4
D931
NC
Q911
78M15
3
O
2
G
1
I
D929
NC
D930
NC
Q953
78M05
3
O
2
G
1
I
L5503
LM182
L5501
LM182
L5502
LM182
D5502
KDS4148U
D5501
KDS4148U
C5503
104Z
E901
1
2
3
4
C5504
NC
P5501
5
4
2
3
7
8
1
C5501
102J
C5502
102J
JL502A
3
2
1
C932
220/25
P971B
F952
10A_125V
F951
10A_125V
JL907B
1
2
3
4
5
6
7
C921
104
F905
5A-UL/T-251
R5007
330
R5008
330
Q5001
2SC2240-BL
Q5003
2SC2240-BL
Q5002
2SC2240-BL
Q5004
2SC2240-BL
C5026
330
C5025
330
R5073
0
R5074
0
C911
8200/63
C912
8200/63
SP_B
SP_A
APOWER
SEC1H
ADJUSTMENT OF IDLING CURRENT
Set the voltages at P5001 and P5002 to 2.5mV by adjusting
R5043 and R5044,
under the condition of no input and no load, immediately after POWER ON.
9mV
9mV
9 - 11mV
11mV
11mV
Re-adjust by following procedure after 4
㨪
6 minutes of heat running.
Below
9mV 9mV
Between
9 - 11mV
Leave it.
Over
11mV 11mV
Set R5043 and R5044 to minimum position before POWER ON.
2)
Equip series 1/4W 100-ohm resister near each terminal of the jig
which is connected to P5001 and P5002.
3)
Please adjust them by using IDLING TIMER (TEST MODE).
3-1
HOW TO ENTER TEST MODE
a.
When the VOLUME of the unit is 25, press MEMORY button
while pressing down ZONE2 OFF button
to display "TEST- _" on the FLT.
b.
When next, SPEAKER-A is pushed.
IDLING TIMER (TEST MODE) " It enters.
R5501 390(1W)
R5502
390(1W)
JL502B
1
2
3
from SD-3 E-2 (TRANSFOMER)
from SD-4 K-3 (AUDIO INPUT PWB)
from SD-4 K-3
(AUDIO INPUT PWB)
to SD-4 K-7 (AUDIO INPUT PWB)
to SD-4 K-3
(AUDIO INPUT PWB)
to SD-9 B-3 (DISPLAY PWB)
Audio signal line
L channel
R channel
ID+
ID-
Test point
DC voltmeter
Jig terminal
100 ohms
(1/4 watt)
c.
ޓ
Press ON/STANDBY button to exit test mode.
4
5
5
4
HPDET
HPDET
to G-3
to G-3
to G-3
BLK
to G-3
to E-6
to E-6
J931 to SD-4 D-2
J930 to SD-4
B-5
