Explanation Of Lsi - JVC AX-R551BK Service Manual

AX-R551 BK
Explanation of LSI
• JLPD75104G525-18 (lC401): System Controller
(1) External Diagram
(2) Pin Functions
Pin No.
Symbol
1
P41
2 P40
3
P53
4 P52
5 P51
6 P50
7 RESET
8 X2
9 Xl
10 P63
11
P62
12 P61
13 P60
14 P73
15 P72
16
P71
17 P70
18 P83
19 P82
20 P81
21 P80
22
P93
23
P92
24
P91
25
P90
26
Vss
27
P13/INT3
28
P12/INT2
29
P11/INTl
30 PlO/INTO
31 PTH03
32
PTH02
1-32 (No. 20016)
I/O
0
0
0
0
0
0
-
-
-
0
0
0
0
-
-
-
-
0
-
0
0
0
0
0
0
-
I
-
I
I
-
-
IC401
tlPD75104
Terminal Function
VCR (LED)
TAPE 1 (LED)
CD (LED)
TV (LED)
TUNER (LED)
PHONO(LED)
- -
- -
- -
KEY OUT
KEY OUT
KEY OUT
KEY OUT
- -
- -
- -
- -
AC relay ON/OFF
- -
- -
- -
A/E
MUTE
VOLDOWN
VOLUP
- -
DCSIN
- -
RMIN
INH
- -
- -
Pin No. Symbol I/O
Terminal Func1ion
33 PTH01
-
- -
34
PTHOO
- - -
35
no
-
- -
36
T11
-
- -
37 P23
0 DCSOUT
38 P22
-
- -
39 P21
- - -
40 P20/PTOO
0 STB
41
P03/S1
-
- -
42 P02/S0
0
Si .............. TC9164
43 P01/SCK
0 CK ............. TC9162
44 POO/INT4
- - -
45 P123
KEYIN
46
P122 KEY IN
47 P121
KEY IN
48 P120
KEY IN
49 P133
KEY IN
50
P132 KEYIN
51 P131
KEY IN
52 P130
KEY IN
53
P143 TEST (active H)
54 P142
CS3 (preparation)
55 P141
CS2 (relay)
56
P140 CSI (4/3 RS)
57
NC
- - -
58
Vdd
-
- -
59 P33
0 RM IND(LED)
60 P32
0 VOL IND (LED)
61
P31 0
A/E IND (LED)
62 P30 0
TAPE 2 (LED)
63 P43
0 SEA SOURCE (LED)
64 P42
0 SEA REC (LED)