Ic Block Diagram - Sanyo DC-T44 Service Manual

PARTS LIST (TUNER) IC BLOCK DIAGRAM (TUNER)
IC242 HD404728A34S (4 - Bit Micro Processor)
A"
:initial
B* :Active Mode C' :Back Up
B' c'
H L
H L
H L
H L
H L
L
Hr-
tmp
L
H L
H L
H L
H L
L/H ,:" p
H L
L
L
L
L
No
PI. name
Descriptmn High : ,Low :
A' B' c'
do
PIn name De$criptmn
High :
,LOW :
A'
1 SEG.0UT5 FL segment output
(SEG.0UT5)
2 SEG.0UT4 FL
segment output (SEG 0uT4)
3 SEG.0UT3 FL segment
output
(5 EG.0uT3)
4 SEG.0UT2 FL segment output (SEG.0UT2)
5 SEG OUT1
FL segment output (SEG OUT1)
6 OIGIT OUT1 FL O!git output (OIG.OUT1)
7 OIGIT 0UT2 FL Dtgit output (OIG.0UT2)
8 DIGIT 0UT3 FL Oigit output (OIG.0UT3)
9 DIGIT 0UT4 FL Otgit output (OIG.0UT4)
10 DIGIT 0UT5
FL Olgit output (DIG.0UT5)
11 DIGIT 0UT6 FL Oiglt output (OIG.0UT6)
12 FUNCT4
FuNCTION SW signal output
TUNER; ,Hi PULSE
L
I I
I 1
34 51
I
35 so Oata output to the PLL IC
I
36
I
IPLLIC
CE
Ch!p enable signal output to the
Ill
CD Control output Norm: L,
x, ::N;::C CD FAOE IN.FADE OUT: H,
PW OFF CHECK Key-l': Clock
L H L
CHECK
Output fOr ad] U5tMent
IC BLOCK DIAGRAM (TUNER)
I
38
39
40
41
42
43
44
45
46
47
4B
49
50
51
52
KEY OUT1 Key Matrix output signal 1
KEY 0UT2 Key Matrix output signal 2
KEY 0UT3 Key Matrix output signal 3
KEY 0uT4 Key Matrix output signal 4
KEY 0UT5 Key Matrix output signal 5
KEY IN1 Key Matrix input signal 1
13
FUNCT3
FUNCTION SW signal output L
AUX; ,Hi PULSE
14
FUNCT2
FUNCTION SW signal output
L
VCR:.Hi PULSE
IC221 LA1265(Tuner System) IC231 LA3361(PLL FM MPX. Stereo Demodulator)
Pnuf
,WU1 LfV6L CMPEN$A1O@
"co . . .
(LW FILIERI
I*", 1? C".RG, c,,
EfEE3
,6 .20dB MUTE -20dB Muting output,
KEY IN2 Key Matrix input signal 1
I
I
KEY IN3
Key Matrix input signal 1
I
17
II ~
MUTE m Muting output, ON/OFF+_/H
IL
I
L
J-1
"cc
Cwfwhron
18 POWER SW
POWER SW key input. Nrm.+H
I
19
I
Vdlso
! Power source fOr disDlav
w
21 VOLOOWN Vol Down signal output Norm.+L L
53 TEST
54
POWER Ry POWER RELAY Control output
Relay OFF:L Relay ON:H
L
H :;
55 SEG.0UT15 FL segment output (SEG.0UT15)
IC291 L78M12ML(3-Terminal Voltage Regulator)
IC241 LM7001(Pre-Scaier)
lWUT
m
24 TAPE CONT TAPE PLAY-xL. TAPE REC+H,
25 FM MONO Stereo Auto.+L, Compulsion
56 SEG.0UT14 FL segment output (SEG.0UT14)
57
SEG.0UT13 FL segment output (SEG.0UT13)
58 SEG.0UT12 FL segment output (SEG.0UT12)
59 SEG.OUT11 FL segment output (SEG.ouTl 1)
60
SEG.OUTIO FL segment output (SEG.OUTIO)
61 SEG.0UT9 FL segment output (5EG.0uT9)
62
SEG OUT8 FL segment output (SEG.0UT8)
63
SEG.0UT7 FL segment output (SEG.0UT7)
64
SEG.0UT6 FL segment output (SEG.0UT6)
ml
I Po?
KC
x:.
xrw,
,.1.
AHIN
I
A----P-H
TUNEO/SD TUNEDi50 sianal inDut
-CL
L+
I
27
I
28
IR Remote controller recewed s,gnal
~
X. STEREO ,ND FM. STEREO recetved d,splay input
L
S.F? .SG1.7E.
LATCH
I
T
w
–7–