Schematic - Onkyo TX-SR403 Service Manual

A B
SCHEMATIC DIAGRAMS-7
DISPLAY SECTION
1
NAETC-8516
2
R891 NC
R892 NC JL891A
1
5 2
4 3
L891 022M
2 4
PHONES
3 5
7
L892 022M
8
L893 022M
1
P891
R893
NC
U04
NC
HEADPHONE JACK
PC BOARD
3
U03 SWITCH PC BOARD
Q822
Q824
NC
NC
R832 R833 R834 R835 R836
4 470 560 820 1.2K 2.2K
5
C
NADIS-8513
U01
DISPLAY PC BOARD
49
50
SEG1
51
SEG0
52
VCC2
53
DIG15/SEG39
54
DIG14/SEG38
55
DIG13/SEG37
56
DIG12/SEG36
57
DIG11
58
DIG10
59
DIG9
60
DIG8
61
DIG7
62
DIG6
63
DIG5
64
NASW-8515
Q823
NC
D823
NC
+BLED 7 7 +BLED
LEDPURE 6 6 LEDPURE
LEDZONE2 5 5 LEDZONE2
GNDLED 4 4
KEY0_2 3 3 KEY0_2
KEYINT0 2 2 KEYINT0
1 1
JL831A
JL831B
NC NC
3 3
2 2
GNDTACT 1 1
JL832B JL832A
NOTE
THE COMPONENTS IDENTIFIED BY MARK ! ARE CRITICAL FOR SAFETY
REPLACE ONLY WITH PART NUMBER SPECIFIED.
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 1/4WATTS UNLESS OTHERWISE NOTED.
THE THICK LINES ON PC BOARD ARE THE PRINTING SIDE OF THE PARTS.
EX) PRINTING SIDE
CIRCUIT IS SUBJECT TO CHANGE FOR IMPROVEMENT.
<Note>
NC=No mount of parts.
D E
Q801
FL TUBE
16BT127GNK
C819 104Z
C818
C820 104Z
223Z
C817
33/50
+
220 R807
220
R806
C816
473Z
C815
473Z
32
SEG2 31
SEG19 SEG20
30
SEG21
29
SEG22
28
SEG23
27
SEG24
26
SEG25
25
Q802
SEG26
24
VP
M66005
23
SEG27
22
SEG28
21
SEG29
20
SEG30
19
SEG31
DIG4 18
SEG32
17
SEG33
Q821
NC
101J C806 R802 3.3K FLDRST
101J C807 R803 3.3K FLDCS
101J C808 R804 220 FLDCLK
101J C809 R805 220 FLDSDO
MICMUT
R831
330
R841 R842 R843 R844
330 470 560 820
R851 R852 R853 R854
330 470 560 820
R861 R862 R863 R864
330 470 560 820
F G
R812
10K
MASTER
R811
VOLUME
10K
S851
-VP R810 100
L811 022M
L812
022M
LEDSTBY
D821
STANDBY
R827
100
U821
2
3
1
R828
1K
R845 R846 R847
1.2K 2.2K 3.9K
R855 R856 R857 R858
1.2K 2.2K 3.9K 12K
R865 R866 R867 R868
1.2K 2.2K 3.9K 12K
TX-SR303/8340
H
P703B
23P
LEDZONE2 1
REMIN 2
FLDRST 3
FLDCS 4
FLDCLK 5
FLDSDO 6
KEY0 7
KEY1 8
KEY2 9
KEY3 10
GNDCPU 11
KEYINT0 12
+5.6S 13
KEYINT1 14
15
KEYINT2 16
+5VDIS 17
KEYINT3 18
19
VOLA 20
FAC2 21
VOLB 22
FAC1 23
LEDSTBY 24
LEDPURE 25
V4_R 26
GNDV4 27
V4_L 28
29
V4V 30
GNDV4V 31
V4Y 32
33
V4C 34
-7V 35
MICOUT 36
+7V 37
MICDET 38
GNDMIC 39
OPTF 40
3
2
1
JL833A
NC