Sharp QT-CD121, Service Manual

Page: 9 / 32

QT-CD121
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Figure 9 BLOCK DIAGRAM (2/2)
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FM ROD ANTENNA
F1
B.P.F
L1
FM RF
L3
AM BAR ANT.
L2
FM OSC
OSC
MIX
VCC
RF
AMP
IC1
LA1186N
FM FRONT END
FM
+B
T1
FM IF
CF
10.7MHz
IC2
LA1805
FM / AM
IF MPX.
AM IF
T3
CP
T2
FM DET
455kHz
L5
AM OSC
AM / FM SELECT
+B
VR1
VCO
TUNER
+B
IC501
LA4597
POWER AMP.
L
VOLUME
X-BASS
SW203
A,B
SURROUND
SW202
A,B
VR201
A,B
STANBY
R
5
6
2
3
7
1
IC203
KIA7808P VOLTAGE
REGULATOR
+B2
+B1
SP501
L-CH
SPEAKERS
SP502
R-CH
SO651
SW201-C
POWER/
FUNCTION
AM / FM
SELECT
+B
FM +B
SW201-D POWER /
FUNCTION
RADIO
TAPE
REC
POWER/
FUNCTION
SW201-A,B
CD
EC / PB
SW102
A,F
P. B REC
IC101
EQULIZER
AMP.
BA331IL
REC
REC
P.B
P.B
P.B
L
R
L
R
SW102
REC / PB
B.D
REC / PB
SW102
C,E
L-CH
REC / PB
HEAD
R-CH
(AUDIO GND)
+7.4V
+B2
(DIGITAL GND)
(POWER GND)
FROM
CD
SECTION
R-CH
ERASE
HEAD
SW102-H REC / PB
BIAS
OSC. C201
L201
SW102-G
REC / PB
+B1
M601
TAPE
MOTOR
SW601
MAIN
D651~D654 RECTIFIER
TUNER
+B
T651
POWER
TRANSFORMER
BATTERY
DC12V
[' D' SIZE (UM/SUM-1,
R20 or HP-2)BATTERYx8]
AC INPUT
AC 120V
60Hz
REG.
OSC
RF
MPX
FM - IF
DET.
POST
AMP.
MUTE
TU
DRIV.
AGC
GND
AM - IF
DET.
LEVEL - DBT.
PILOT
DET.
TRIG.
ST.
DRIV.
VCC
FF
FF
FF
VCO
ST.
SWIT.
DECODER PHASE
DET.
L-CH
IC201
KIA4558S
SURROUND AMP.