Onkyo TX-L55, Service Manual

Page: 13 / 61

TX-LR552
SCHEMATIC DIAGRAM 1
DISPLAY SECTION
-VP
MCSDA
P4
P3
P2
P1
P36
11G
10G
9G
8G
7G
6G
5G
4G
3G
2G
1G
FL-H2
FL-H1
-VP
MCSDA
MCMDA
MCCLK
MCRDY
MCRST
GND
GND
KEY1
KEY0
GND
KEY2
12G
VAJ VBJ
STLED
MCRST MCRDY MCCLK MCMDA
+5V
+5V
+5V
+5V
IRIN
+5V
GND1
GND2
P23
FL-H2 FL-H1
P36 P4 P3 P2 P1 12G 11G 10G 9G 8G 7G 6G 5G 4G 2G 1G 3G P25 P26 P27 P28 P29 P30 P31 P24 P32 P33 P34 P35
-VP
P19 P20 P21 P22 P5 P6 P7 P8 P9 P10 P11 P12 P13 P14 P15 P16 P17 P18
VOLUME VOLUME
MASTER
VOLUME
LISTENING
TV
V1 V2 DVD AUX FM
AM
TU DOWN TU UP
NADIS-8343
STANDBY
STANDBY
NASW-8348
R8280
100K
Q8280
2SC2712-GR
D8990
1SS335
C8810
101J
C8840
104Z
C8820
101J
C8830
101J
R8820
470
R8810
470 D8810
UDZ5.6B
1
C8850
104Z
C8910
100/6.3
+
C8920
104Z
R8970
1M
R8050
0
R8070
470
R8060
470
R8080
470
R8100
470
R8090
470
R8110
10K
C8060
330J
C8080
330J
C8100
330J
C8090
330J
C8070
330J
C8210
104Z
C8520
102J
C8510
102J
R8520
10K
R8510
10K
R8540
10K
R8530 10K
R8240 2.7K
C8240
104Z
R8270 10K
R8260 10K
P7001C
1
2
3
4
5
6
7
8
9
10
11
R8140
10K
R8130
10K
R8170
10K
R8190 10K
R8340
330
R8330
330
Q8340
DTC114YKA
Q8330
DTC114YKA
S8510
2
3 1
C8930
47/50
+
R8241 2.7K
C8241
104Z
S8710 S8720 S8730 S8740 S8750 S8760 S8770
S8650
R8650
390
S8660
R8660
0
X8010
5MHz
2
D8330 D8340
S8620
R8770
390
R8760
470
R8750
820
R8740
1K
R8730
1.8K
R8720
3.9K
R8710
10K
R8210
2.7K
R8711
100
C8711
100/6.3
+
C8711
100/6.3
+
C8712
104Z
R8712
100
R8620
390
U8711
PIC-37143TC5
1
2
3
P8310A
5
4
3
2
1
Q8010
MPD780232GC-091-8BT
61
P4
62
P3
63
P2
64
P1
65
P36
66
NC
67
14G
68
13G
69
12G
70
11G
71
10G
72
9G
73
8G
74
7G
75
6G
76
5G
77
4G
78
3G
79
2G
80
1G
1
5V
2
GND
3
CLOCK
4
CLOCK
5
FRAIC
6
RESET
7
SUBCL
8
SUBSI
9
SUBSO
10
SUBREQ
11
VOLA
12
VOLB
13
STLED
14
LED1
15
IRIN
16
LED2
17
NC
18
AVSS
19 20
KEY2
21
KEY1
22
KEY0
23
VSS
24
AVDD
25
VDD
26
27
28
P35
29
P34
30
P33
31
P32
32
P31
33
P30
34
P29
35
P28
36
P27
37
P26
38
P25
39
P24
40
P23
41
P22
42
P21
43
P20
44
P19
45
P18
46
P17
47
P16
48
P15
49
P14
50
P13
51
P12
52
P11
53
P10
54
P9
55
P8
56
P7
57
P6
58
P5
59
VDD2
60
VDISP
R8310
470
D8310
Q8310
DTC114YKA
S8610
P8310B
5
4
3
2
1
R8610
470
Q8020
HFA-12SM50T
62
F11
61
F12
60
NP
59
NP
58
G01
57
G02
56
G03
55
G04
54
G05
53
G06
52
G07
51
G08
50
G09
49
G10
48
G11
47
G12
46
P01
45
P02
44
P03
43
P04
42
P05
41
P06
40
P07
39
P08
38
P09
37
P10
36
P11
35
P12
34
P13
33
P14
32
P15
31
P16
30
P17
29
P18
28
NC
27
NC
26
NC
25
NC
24
NC
23
NC
22
P19
21
P20
20
P21
19
P22
18
P23
17
P24
16
P25
15
P26
14
P27
13
P28
12
P29
11
P30
10
P31
9
P32
8
P33
7
P34
6
P35
5
P36
4
NP
3
NP
2
F21
1
F22
R8914 100K
R8913 100K
R8912 100K
R8911 100K
U9
U8
A
1
2
3
4
5
B C D E F G H