Onkyo TX-L55 Service Manual page 12

A B
SCHEMATIC DIAGRAM 1
DISPLAY SECTION
1
2
3
101J
C881
104Z
C884
R882
470
11 FL-H2 R881
470
10 FL-H1
9 -VP
8 GND
7 GND
4 6 D899 1SS335 V+5
5 MCSDA
4 MCMDA
3 MCCLK
2 MCRDY
1 MCRST
P7001A
5
C
Q802
HFA-12SM50T
NADIS-8346
U8
-VP
C893
33/50
P4 61
P4
P3 62
P3
P2 63
P2
P1 64
P1
P36 65
P36
R828 66
NC
12G 100K 67
14G
68
Q828 13G
69
2SC2712-GR
12G MPD780232GC-091-8BT
11G 70
11G
10G 71
10G
9G 72
9G
8G 73
8G
7G 74
7G
6G 75
6G
5G 76
5G
4G 77
4G
3G 78
3G
2G 79
2G
1G 80
1G
C882 101J
100/6.3
C891
C883 101J
104Z
C885 104Z
R897
1M
X801
1
D881 5MHz
UDZ5.6B
C810 330J
C809 330J
C808
330J C807
330J
C806
330J R811
10K
R8702
100
104Z
C8702
U8701
100/6.3
C8701
3
2
1 R8701 IRIN
100
PIC-37043TM2
D E
R8901 100K
R8902 100K
R8903 100K
R8904 100K
40
P23
39
P24
38
P25
37
P26
36
P27
35
Q801 P28
34
P29
33
P30
32
P31
31
P32
30
P33
29
P34
28
P35
R827 10K
27
26 R826 10K
25 V+5
VDD
24
AVDD
23 GND
VSS
22 KEY0
KEY0
21
KEY1
R824 2.7K
C824 104Z
R820 10K
R819 10K
R816
10K R817
10K
R814
10K
R813
10K V+5
R851
10K
10K
2.7K
R821 R852
C821
104Z
R862
390
DISPLAY
F G
R877 R876 R874 R873 R872
R875
390 1K 1.8K 3.9K
470 820
TU DOWN TU UP TONE TONE UP
TONE DOWN INPUT
UP
INPUT INPUT
D834 D833
UP DOWN
Q833 Q832
Q834
DTC114YKA
DTC114YKA DTC114YKA
NASW-8347
U9
NASW-8345
U8
P851A P851B
1 1 P831A
2 2 1
3 3 2
3
S851
4
P831B 5
1 MASTER
2 VOLUME
3
4
5
TX-L55
H
R871
10K
LISTENING
INPUT
DOWN
D832
LISTENING
D831
SLR342VR
STANDBY
Q831
DTC114YKA
GND1
R861
470
STANDBY
GND2