Onkyo TX-8050S Service Manual page 10

A B
SCHMATIC DIAGRAM - 5 (SD - 5)
POWER AMPLIFIER SECTION
1
+B1LL
L
Av=29dB
Q5007
2SA949-Y
R5073 C5025
0 330
Q5001 Q5003
C5003 2SC2240-BL
Lch R5001 R5007 0V
1K 330
47/50 -0.65V
2SC2240-BL
R5013
2.2K
-14.5V
2
Q5005
2SC1815-GR
Q5009
2SC2229-Y
-B1LL
Lch
AGND
Rch
3
+B1RR
Q5008
2SA949-Y
R
Av=29dB R5074 330
0 C5026
Q5002 Q5004
C5004 2SC2240-BL
R5002 R5008 -0.16V
1K 330
47/50 -0.65V
2SC2240-BL
R5014
2.2K
-14.5V
-52.2V
Q5006
4 2SC1815-GR
Q5010
2SC2229-Y
-B1RR
-57.73V
VOLH
VOLH
SEC1H SEC1H
APOWER
APOWER
IPROTECT IPROTECT
VPROTECT VPROTECT
HPDET
HPDET
SP_A SP_A
5
SP_B SP_B
SP_A
SP_B
GND15
+15V +15V
-15V -15V
6
7
+BDG
DGND
8
TX-8050 / TX8030
C D
Audio signal line
L channel
R channel
R5181
+B1
10
(1/4W)
1.1V +BL R5047 Q5015
2SC5171
2.2
(1/4W)
1.0V Q5019
R5051
0.6V 2SC5198
Q5023
2SC2229-Y
0.22
(1/4W)
HEATSINK R5057
56K
-0.3V
R5505
P5001 0.22(5W)x2
R5029
2
56K
ID+
1
ID-
Q5021
-0.4V R5053
2
-0.6V 2SA1941
R5043 0.22
2KB (1/4W)
-BL
1.1V
Q5017
2SA1930
R5191
-B1
10
(1/4W)
R5182
+B1
10
(1/4W)
1.1V +BR R5048
Q5016
2SC5171
2.2
(1/4W)
R5052
1.0V Q5020
2SC5198
0.6V
Q5024
0.22 2SC2229-Y
(1/4W)
R5058
0.2V HEATSINK
56K
-0.3V
R5506
R5030 P5002 0.22(5W)x2
56K 2
ID+
1
ID-
Q5022
-0.4V R5054
2
-0.6V 2SA1941
R5044 0.22
2KB
(1/4W)
-BR
1.1V
Q5018
2SA1930
R5192
-B1
10
(1/4W)
VOLH
IPROTECT
VPROTECT
SP_A
SP_B
+15V
-15V
to G-3
P915
1
to G-3
1
P917
D929
NC
Q911
78M15
+15V 3 1
O I
C919 C931
Q953
78M05 220/25 220/25
3 1
O I
C932
C920
220/25
220/25
-15V 3
O I
2
79M15
Q912
D931 NC
D930
Q952
HeatSink NC
78M05
5
4
R956
3 O I
1
10(1/2W) 1
2
Q911D
Only for TX-8030
H=50 27160500
E F
R5061 IPRO R5101
33K
22K Q5101 0V
2SA1163-BL
R5103
J5001
NONE 47k
L5001 SPL SPOUTL
R5063
22
R5065
22
R5069
VPRO
47K
R5071 VOLH
47K
D5003
KDS4148U
56.2V C911
8200/63
57.73V
1 1
2 2
3 3 1
4 4
5 5
C912
8200/63
-57.83V
-56.4V
SPGR
J929 to E-7
R5062
IPRO
33K
J930 to SD-4 B-5
J931 to SD-4 D-2
J5002
NONE
L5002 SPR SPOUTR
R5064
22
R5066
22
R5070
VPRO
47K
R5072 VOLH
47K
D5004
KDS4148U
KRC105S KRC105S
Q913 Q914 D926
1 C923 102k
C924
D925 1SS133
J925 NC
1 4
RL912
3 2
3 2 * R913
RL911 10(1/2W)
1 4
200mA
J926 NC
*
J921 NC J923 10(1/2W)
26.65V R914
R921 25.62V
0.22(1/2W)
8.2(1W) R911
C917 C915
1 4 104
1000/35
C916
D922
R912
C918 S1NB60 104
R922 1000/35 0.22(1/2W)
8.2(1W) -25.77V
J922 NC -26.82V
158mA to G-3
D923
J929A 2
D10XB60H
4 11.22V
TP911 1 4
3
3
TP912
G H I
BCAF-0704
SPEAKERS
L
A
R
5
C5301
102J
C5307
C5305
103J
103J C5302
102J
C5306
L
103J
C5308 B
103J
R
5
RL501 RL502
4 5 4 5
3 2 3 2
D921
LN15XB60
6 1 6 1 AorB---4 to 16ohms
A+B---8 to 16ohms
4
D5301 D5302
1SS133 1SS133
C5309 C5310
103J 103J
Q5301 Q5302
KRC105S KRC105S
*
R5501 390(1W)
R5502 390(1W)
R5204
33K
Q5202 Q5203
2SC2712-GR
2SC2712-GR
Q5201 0V
0V
2SA1163-BL
DGND
1SS133
102k
BAPS-0706
P971B
4
1
GRN
3
TP951
P961
to Trans terminal
P971B(GRN)
5 2
F951
5 5 AC_S1L+_ P960
RL913 10A_125V
4 4
TP916
3 3 P959
TP954 P916B(BLK)
2 2
P958
F952 1 1 AC_S1L-_
RL914
10A_125V
5 2
TP952
P957
3
P972B(YEL)
YEL
1 to Trans terminal
4
P972B
3 3 SEC2_2
2 2 P956
TP953
1 1 SEC2_1
P955
5 SEC3_2
F905
4 SEC3_1 P954
3
5A-UL/T-251
TP955
2 FLAC2 P953
1 FLAC1
P952
P951
P950
1 FLAC1
2 FLAC2
3
D951 D954
R951
4 SEC3_1
5 SEC3-2 10(1/2W) RL1N4003 RL1N4003
7.12VAC
7.173VAC
R952
2.2(1/2W)
TX-8050 / TX8030
J K
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 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.
100 ohms
Jig terminal Test point
DC voltmeter
(1/4 watt)
ID+
ID-
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.
c.
Press ON/STANDBY button to exit test mode.
5 P5501
4
1 1 2
L5501 LM182
2 2 3
L5503 LM182
HEAD PHONE
3 3 7
L5502 LM182
4 4
8
5 5
1
E901
1 4
2 3
1
MPOWER
2
+BSUB
3 from SD-3 D-3 (AUDIO INPUT PWB)
GNDDG
4
+BDG
5
POFF
1
MPOWER
2
+BSUB
J928 3
DGND to SD-6 A-2(DG PWB)
4
+BDG
5
POFF
J927 6
DGND
7
5.6V
to G-3
BLK
from SD-3 E-2 (TRANSFOMER)
64.81V--63.2V BAPS0705 for FL
GND_DIS 1
0.129W 43.39V
to SD-9 B-3 (DISPLAY PWB)
Q951
FLAC1 2
18.4mA 2SC2235
R953
VH 3
3.3(1/2W) FLAC2 4
R954
GND_DIS 5
8.2K
D952
UDZS22B
D953
UDZS22B
138.6mA 6.82VAC
6.85VAC