Sanyo HT-F450 Service Manual page 8

IC BLOCK DIAGRAM
.. .
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', ... . . .
IC401 BU4052BC
(Dual 2-input 4-ch Analog Multiplexer/De-Multiplexer)
X CHANNELS lt4KXJT
/32101
(a
Voo
~
1
B COMMON
OUT/lN
A@=
BI NARY
TO
B* ~og;gloN
10F4
OECODER
WmH
'NH @----
INHIBIT
I
I
.0123z
\ /
Y CHANNELS lN/Oi.rr
IC430 CXP84412-103Q (Micro Processor)
x
Y
OY
1
2Y 2
Y.
COMMON
3
3Y 4
lY 5
INH 6
VEE 7
u
-16
-15
-14
-13
-12
-11
I
-lo
- 9
VDO
2x
lx
tOMMON
ox
3x
A.
B
,.
."-
No. Name 1/0 Description
1 PF3 o Not used
2 PF4 0. Not used
3 PF5
o
Not used
4 PF6 o Not used
, ,
li-
5
PF7 I 0 I Not used
6 VOL LED5 O i Volume LED [Max MH=Active) 1
No.
I
Name 1/0
Description
41 ] PA3
o Not used :"'.s$ !'; :3 -L>.., ;tP:- . j? ?J.'-%.%
42 ] PA4 o Not used
. . . -., .. ?
43 I PA5
o
Notueed , -, --- s ~
44 SP.RY o Speaker relay
,. .. -
,,. ,
45 PW.R'f o Power relay - . .:
46 FUNCT.C
o
Function select
12 PD6 o Not used
13 PD7 o Not used
14 PRO LOGIC
o LED
(L=Active)
15 3CH LOGIC o LED
(L=Active)
~
O VIDEO function LED (L=Active)
J
21 LINE o LINE function LED (L=Active)
22 NORMAL o Normal LED (H=Active)
23 WIDE o Wide LED
(H=Active)
24 PHANTOM o Phantom LED
(H=Active)
25 STANDBY o Standby LED (L=Active)
26 PH4 o Not used
27 PH5 o Not used
28 PH6 o Not used
, ,
29 I PH7 I O I Not used
30 I RESET I Reset inout
31 EXTAL
Clock Generator
32 XTAL Clock Generator
33 Vss Ground
34 TX Not used
35 TEX Not used
36 AVSS A/D converter
37 AVREF '- A/D converter for standerd voltage input
38 KEY. O I Key input
39 KEY. 1 I Key input
40 V-CHK
I Detect for stoppage failure of electricity
-.
47 I FUNCT.B
o
Function select ""
48 ] FUNCT.A
o
Function select -
49 PB3 o Not used
50 SUR.CE o
Surround IC chip enable control . ' " ".
51
VO.CE
o
Volume IC
chip
enable control
52 DATA o Data
53 CLK o Clock
54 POWER IN I
Power input
55 Pw.sw
I Power switch input
56 IR
I Remote control signal
57 FUNCTION.SEL
I Function select (L=TV, H=LINE)
58 PE4 o Not used
!
59 I PE5 o Not used
60 j C.MUTE o Center Muting
(H=Active)
61 i S.MUTE
o
Surround Mutino (H=Acfive)
,
,
.
62 I A.MUTE I o I -20dB Muting iH=Activej
63 I F.MUTE O I Front L. R Mutina
(H=Active)
I
64 ] P14 o
Not used
65 IP15 o Not used
66 1P16
o
Not used
,
67 P17 o Not used
68 PGO o
Not used
69 PG 1 0
Not used
70 PG2 o Not used
71 I PG3 I o I Not used I
I
.----
1
I
..-. ----
72 I VDD i
I Power Sucmlv
I
i73i NC I
[ Non connection I
\
a
-.
74 PG4 o
Not used
75 PG5 o Not used
76 PG6 o Not used
77 PG7 o
Not used
4
76 PFO o Not used
79 PF1 o
Not used
60 PF2
o Not used
f
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.
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