Ir 232C Assy (2/2) - Pioneer SC-LX90 Service Manual

Audio/video multi-channel amplifier
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1

10.52 IR 232C ASSY (2/2)

A
CN6381
VKN1414
VSS
10
S23TX
RXD
9
S23CT
BUSY
8
V33D
NC
7
VDD
6
JIGCK
SCLK
5
S23RX
TXD
4
CNVSS
PGM
3
DPLRT
RST
2
OSMRT
B
OSMCS
VSS
1
OSMDT
GNDU
OSMCK
for JIG
Down Lord
CNVSS
WALRT
LCDCS
DPLRT
TC74VHC125AFTS1
OSSYN
NEWRQ
DPLRQ
C
NEWRD
LCDMT
EXPDT
EXPCK
EXPST
EXPOE
D
E
F
AC
2/2
114
1
2
V33U
V33D
L6301
QTL1013
V33D
GNDU
GNDU
R6301
330
1
2
3
4
5
R6302
6
100
7
8
9
14
10
12
11
4/4
13
11
7
X6301
12
13
IC6051
ASS7087
14
15.7M
R6303
15
100
R6325
47k
16
17
18
19
20
21
22
23
24
25
R6304
100
V33D
R6332
47k
GNDU
R6331
47k
R6330
STBY
R6319
STBY
Q6301
(22k)
GNDU
V56U
GNDU GLCD
GNDST
GNDU_MN
C6401
1.0/16
1
3
5
7
9
11
13
15
2
4
6
8
10
14
12
AD
CN8511
1/2
2
3
C6304
0.1/16
100
99 98 97 96
95
94
93
92
91
90
89
88
87
MAIN OSD RST
MAIN OSD CS
MAIN OSD DATA
NC
MAIN OSD CLK
16bitSetup=L
Vss(expand mode)
WALL RST
LCD CS
RESET
Xout
IC6301
Vss(GND)
PEG292A8
Xin
DISPLAY
Vcc1(5V)
NMI
VIDEO SYNC
NEW REQ
DISPLAY REQ
NEW RDY
LCD MUTE
EXP DATA
EXP CLK
EXP ST
EXP OE
SR+/
232C
SW
26
27
28
29
30
31
32
33
34
35
36
37 38 39
R6318
100k
V33D
GNDU
V12F
GNDU
17
19
1
16
18
20
2
CN6404
CKS1764
SC-09TX
3
4
R6333
47k
R6334
47k
86
85
84
83
82
81
80 79
78
77 76
DQ11
75
D11
74
DQ12
D12
DQ13
73
D13
72
DQ14
D14
71
DQ15
D15
70
NC
69
A1
68
A2
67
A3
66
A4
65
A5
64
A6
63
A7
-COM
62
Vss
61
A8
60
Vcc
59
A9
A10
58
A10
57
A11
A11
A12
56
A12
55
A13
A13
54
A14
A14
53
A15
A15
52
A16
A16
A17
51
A17
40
41 42
43 44
45
46
47
48
49 50
CS0
CS2
XWE
XOE
XWR
GNDU
3
5
7
9
11
13
15
17
4
6
8
10
14
16
18
12
AD
CN8510
1/2
4
A1
A2
A3
A4
A5
A6
A7
A8
A9
A18
V50E
100k
R6401
100k
R6402
100k
R6403
100k
R6410
100k
R6412
19
1
GNDU
20
CN6403
CKS1764

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