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Panasonic Technics ST-CH7L Service Manual page 10

Lw/mw/fm stereo tuner
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m@ BLOCK DIAGRAM
ST-CH7L
ST-CH7L
—15—
~16—
(5 Pee ees
JK7O
FM
MONO
DISTORTION
adj.
RMI
ALSS2E
0302
c
amp
eek
FM
MPX
D302
o 9
T201,202
ANT273W
1
A) a304
FM ANT
7;
7H
®
8
jet, coi
zi0l
sea
FM/AM IF AMP. DET
tt
FM FRONT END
CF201
CF 202
CB)
#
RFamp
Q201,202
5!
t
3
5
7
3
13
ete
| C201
pds
ies
GND
|
I
1
|
1
=
<eqferere
|
!,
@205
BL
aVA E>
y
i
:
n
in
1
CD
+
Ves
dt
4
|
Capen ar}
|
i
ga
te
I
ees
|
aD
ee
ae
el
—<+
—<
|
12
14
6
8
sf
Tr
v4
16
TP3010
ib
gee
a
|
va
!
+
I
4
VR301
a
|
-——-
(FM MPX
}
18
10
ts
;
cf
i
VCO adj)
|
SSK
Buffer
(>
-
Q303
;
OQ)
Q256
Signal
receive
detector
XIOl
CTIO!
(72MHz)
D201
z901
LM7OOI
}
_
REMOTE
Spd7te3ds
Licio1)
CONTROL
~
PLL FREQUENCY
control
SENSOR
(AM) @B)
FM/AM
XOUT XIN
LW
PD2 FMIN
SYNTHESIZER
Power Supply
Shem
AM IN
(FM) GB)
Selector
Vss
TB
CE
CL
DATA
~ Fe
7
$3
94 FO
Switching
(reset)
|
907,908
KEY
MATRIX
20
| 23
24
31
21
32
10
12
bis
19
Aah ae
So) Shae
ee Ses
Sh ee =f
cn
pe eS ae
=
Spa eee
eee
a
se
ee
a
ny eee
za
TB
CE
SBT!
sBol
spb
POWER
RST
MUTE
STEREO
MONO
INT
POWER
Q902~905
KEY2
DOWN
\(APRESET)
(ATUNING)
a
MNiaTIsSST Ti
CLOCK Our?
)
$901
$905
| 1c901 |
CLOCK
IN
©
\
I
|
2
JL
|
MICROCOMPUTER
DATA OUTY
=
(WPRESET) | (MEMORY) | (Ww TUNING)
|
(CONTROLLER)
DATA
Ind
—{6)
$902
$904
s906
|
|
SEGO ~ SEGI5, P70
DGTO~DGT6
"*
Bs
xe
L.
_kS!_ks2_ks3__
osc2__osci
Vv pp
|
ioe
ee
ePecae
aes
anne
N
en
rer
NN
i
ee
es Se
|
z.
P
|
35
36
37
2
3
47
63
38
44
64
(BAND)
|
!
$903
31x 901
tt
ye
v
|
£
1
tOH
|
|
\
|
|
|
be
aa
|( SELECT)
2
S907
4
A
Q703
0701,705
T701
|
p
FL DISPLAY
l(w SELECT)
(RECALL)
|
$908
soll
|
oO
oO
|
|
Da
A
we
<
a
(TIMER SET) (CANCEL) | (POWER)
| $909
$912
See
|
p
p
p
|
|
Note
1
SSS
= 7A
4
Le
4
1 —P—:FMSIGNAL
|
ooot> = FM OSC
& D707
'AM SIGNAL
|
®:
AM
OSC
i]
Rech
out
Lech
out
POWER
B.CLK
B.DATA
B. GND
Ac
Ac

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