Sharp QT-CD121H (serv.man2) Service Manual ▷ View online
QT-CD121H/112H
– 21 –
Figure 21 SCHEMATIC DIAGRAM (6/8)
7
8
9
10
11
12
• NOTES ON SCHEMATIC DIAGRAM can be found on page 11.
L802
0.68
µ
H
CNS803
CNP803
BI803
SW702
PICKUP IN
M702
SLED
MOTOR
M701
SPINDLE
MOTOR
CNS801
BI801
1
CNS802
BI802
R833
5.6K
R835
470
C830
2P
(CH)
C833
0.001
R836
47K
C834
0.033
R832
56K
C831
0.0027
R838
33K
R837
47K
C832
27P
(CH)
R834
1K
C822
220P
IC804
BA5914FP
FOCUS/TRACKING/SPIN/SLIDE DRIVER
C844 330/10
R810
82K
D802
1N4148
R849 100K
C851
0.022
C821
1/50
220
K
0
.0033
R827 220K
C846
330/10
Q804
S8050D
R877
220
C889
10/16
ZD801
MTZJ5.6B
R878
100
C887
0.022
R875 10K
R876 10K
R873
100
C890
100/10
C867
10/16
R874
100
C868
10/16
XL801
16.93MHz
R880
100
C843
100/10
C873
0.01
L801
0.82
µ
H
R860
1K
IC802
LC78623D
SERVO/SIGNAL CONTROL
C847
0.01
0.047
C842
27K
R857
1.2K
R856
C841
0.047
0.047
C802 47/16
R801
1K
C801
0.01
1K
C870
0.0022
C869
0.0022
R858
680
C850
0.1
C845
4.7/50
R871
4.7K
6
7
5 4 3 2 1
6
5
4
3
2
1
6
5
4
3
2
1
6
5
4
3
2
1
8
7
6
5
4
3
2
1
8
7
6
5
4
3
2
1
8
7
6
5
4
3
2
1
5
4
3
2
1
4
3
2
1
5
4
3
2
1
4
3
2
1
5
4
3
2
1
4
3
2
1
30 31 32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
1
2
3
3
4
5
5
6
7
8
9
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
1
2
2
1
2
2
3
4
5
5
6
7
8
9
10
11
12
13
14
14
15
16
16
17 18 19 20 21 22 23
24 25 26 27 28 29 30 31 32
15
16
16
33
34
33
34
35
36
37
38
39
41
40
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
47
48
0V
3.5V
3.5V
3.5V
2.5V
2.5V
7.4V
7.4V
0V
0V
2.7V
3.8V
3.2V
3.5V
3.5V
2.5V
0V
0V
0V
0V
0V
2.5V
2.5V
+3.8V
-3.2V
0V
4.8V
7.4V
5.5V
+B
AUDIO GND
POWER GND
MUTE
DIGITAL GND
DIGITAL +7.4V
L-CH
R-CH
+B
+B
+B
+B
+B
+B
+B
LD
VR
PD
GND
FO–
FO+
TR+
TR–
PD
VR
LD
E
K
C
B
A
F
MON
LD
FO–
FO–
FO+
FO+
TR+
TR+
TR–
TR–
F
B
A
E
K
+B
+B
+B
+B
+B
+B
+B
+B
PU-IN
SL–
SL+
SP–
SP+
FO+
FO–
TR–
TR+
TR+
TR–
FO–
FO+
K
A
B
E
F
CLK
DEF
NC
TBC
FSC
FSC
GND
SLI
SLC
RFS–
RFSM
CV+
CV–
SLOF
HFL
TES
TOFF
JP–
SL+
SL–
TEST1
CS
TEST5
4.2M
16M
TST11
RES
CQCK
COIN
RWC
SQOUT
WRQ
FSX
SBCK
EFLG
SFSY
SBSY
PW
XVSS
XIN
XOUT
XVDD
XVDD
MUTER
RVDD
RCHO
RVSS
LVSS
LCHO
LVDD
NC
MUTEL
TEST4
TEST3
DOUT
C2F
EMPH
CONT5
CONT4
CONT3
CONT2
CONT1
VDD
FSEQ
PCK
JP–
JP+
TGL
TOFF
TES
HFL
V/P–
CLV–
CLV+
TEST2
EMFIN
EMFO
Vss
FR
VVDD
ISET
VVss
PDO
TAI
DEFI
GND
VO4–
VO4+
VIN4
VIN4'
BIAS IN
VCC
VCC
VIN3'
VIN3
VO3+
VO3–
OP IN +
OP IN -
OP OUT
GND
VO2-
VIN1'
GND
VIN2
VIN2'
VO2+
MUTE
VO1-
VIN1
VO1+
CD MOTOR PWB-B
P22 1 - E
TO MAIN SECTION
PICKUP UNIT
M
M
47
46
45
50
49
48
53
52
51
55
54
58
57
56
61
60
59
64
63
62
GE PIN
NO. VOLTAGE
2V
0V
0.1V
2.2V
0V
2.5V
0V
2.5V
0V
0V
0V
4.1V
4.1V
5V
0V
2.7V
2.4V
0V
0V
0V
0V
0.1V
2.2V
0V
2.5V
0V
2.5V
0V
0V
0V
4.1V
4.1V
5V
0V
2.7V
2.4V
0V
0V
0V
QT-CD121H/112H
– 22 –
A
B
C
D
E
F
G
H
1
2
3
4
5
6
Figure 22 SCHEMATIC DIAGRAM (7/8)
• NOTES ON SCHEMATIC DIAGRAM can be found on page 11.
QT-CD112H
FM
MW
SW
SW1-D
FM
MW
SW
C51 8P(CH)
SW1-C
SW1-E
SW1-B
SW1-A
FM
FM
FM
MW
MW
MW
SW
SW
SW1-F
FM
MW
SW
SW
C44 180P
(CH)
C41
0.0033
TC6
VC5
L5
SW OSC.
L4
MW OSC.
R457
1K
R458
1K
CNP101
CNS101
SW102-H
SW102-C
SW102-B
SW102-E
SW102-D
SW102-A
SW102-G
SW102-F
C354
VC3
L3
MW BAR ANT.
TC3
L6
SW ANT.
T1
TC1
D1
1N4148
F1
B.P.F.
C2
0.001
L1
FM ANT.
C9
0.0047
C16
0.0047
R1
10
R7
120
R3
47
R9
22K
IC1
LA1186N
FM FRONT END
RF AMP.
C5
33P
(CH)
R2
33
C6
18P
(RH)
VC2
TC2
C8
3P
(CH)
R5
330K
C14
0.022
R6
820K
VC1
L2
C4
22P
(CH)
C37
220/10
C39
0.022
R8 3.9K
T2
R27
33K
C22
0.0039
C23 0.01
C38
0.022
C24
470P
C25
3.3/50
C27
3.3/50
R11
1.2K
R28
100K
VR1
6.8K
(B)
R29
15K
C28
0.0015 (Styrol)
R25
120
CF1
C29
10/16
R104
18K
R105
15K
C109
270P
C112
330P
C111
330P
R107
1K
C108
820P
C107
820P
R108
1K
C110
270P
C114
47/16
R110
120
R455
6.8K
R456
6.8K
330
R101
330
R102
C35
1/50
SW201-B
CD
R103
18K
C352
220/10
47
R3
C353
0.022
(ML)
R351
220
150
R352
L301
C351
0.0022
(ML)
C105
0.0018
R106
15K
C106
0.0018
R123
10K
R124
10K
220P
C11
C10
0.022
C46
15P
(CH)
C15
0.022
IC2
LA1805
VC4
TC5
C17
0.022
C21
0.022
C20
0.022
T3
CF2
C26
22/16
SW201-A
CD
R16
10K
R13
3.3K
R14
3.3K
R15
10K
C33
1/50
C34
1/50
R38 10K
0.015
C32
C31 0.015
R17 68
R39 56
C53
0.022
C48
5P
(CH)
C36
0.022
R121
1K
J6
82
D103
1N4148
R122
1K
C123
100/10
C121
0.01
C122 0.01
D101
1N4148
D102 1N4148
R120
3.3K
R119 3.3K
C119 2.2/50
C120 47/16
R125
680K
R118
3.9K
C115
0.018(ML)
C117 10/16
R117
3.9K
R115
3.9K
R113
8.2K
C118
10/16
R116
3.9K
R114
8.2K
IC101
BA3311L
REC./P.B.
EQUALIZER AMP.
C113
47/16
C116
0.018
(ML)
R109
120
4
4
3
3
2
2
1
1
12
1 2 3
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6 7
8
9
10
11
13
14
15
16
17
18
19
20
21
22
23
24
2
5
8
9
10
11
TC4
C45
180P
(CH)
TAPE
RECORD/PLAYBACK
HEAD
RECORD/PLAYBACK
HEAD
NC
2
3
1
3
2
1
VCO
OSC
MIX
FM BAND
COVERAGE
fH
fL
SW BAND
COVERAGE
MW BAND
COVERAGE
fH
fL
fH
fL
FM
TRACKING
fL
fL
fL
fH
fH
fH
MW
TRACKING
SW
TRACKING
P
P
R
FM DET
FM OSC.
FM IF
ALC T
FILTER
VCC
GND
NF1
NF2
IN2
IN1
OUT2
OUT1
AM
OSC
STB
AM RF
+B
FM
DET
AM
OUT
AM IN
MPX
IN
MO/ST
VCO
AM/FM
GND
AM
IF
AGC
AM
MIX
FM
IF IN
R-CH
L-CH
R
P
R
R
P
TAPE
FM MONO
FM MONO
FM STEREO
FM STEREO
POWER GND
DIGITAL GND
CD +7.4V
L-CH
MUTE
AUDIO GND
R-CH
FW1
AM IF
MPX VCO
CK 76kHz
P
P
P
P
R
R
R
R
TAPE
L-CH
R-CH
ERASE HEAD
FM
ROD ANTENA
PRE AMP
DET
OUT
P21 7 - H
TO CD SERVO/
DISPLAY SECTION
6
7
5
4
3
2
2
1
1
1
3
4
6
7
12
FM/AF IF MPX.
9
8
7
6
5
4
3
2
1
PIN
NO. VOLTAGE
IC1
0.9V
1.6V
6.8V
0V
0V
6.8V
1.4V
6.2V
6.8V
1.6V
6.8V
0V
0V
6.8V
1.4V
6.2V
6.8V
QT-CD121H/112H
– 23 –
7
8
9
10
11
12
Figure 23 SCHEMATIC DIAGRAM (8/8)
11.83V
0V
8V
<3V>
<0.7V>
<0.1V>
1
1
5
5
HEADPHONES PWB-A4
SW102-G
C354 0.0056 (ML)
CNP201
CNS201
SW202-A
SW202-B
1N4148
D309
1N4148
D308
C302
0.022
C301
0.022
IC203
KIA7808P
VOLTAGE
REGULATOR
VR201-A 20K (B)
VR201-B
20K(B)
C218 0.0027
R220
3.3K
R304
1.8K
C217 0.0027
R219
3.3K
C352
220/10
Q351
S8050D
R354
10
47K
R353
C353
0.022
(ML)
R351
220
150
R352
C221
0.001
C223
100/10
C228
1/50
C229 100/10
C233
1000/10
FW202
C227
3300/25
C226 0.022
D201
1N4148
IC202 LA4597
POWER AMP.
C222
0.001
C225
220/25
C224
100/10
R215
2.2K
R216
2.2K
C213
0.1
C214
0.1
C230 100/10
SW201-D
C234
1000/10
C232
0.1
(ML)
C231
0.1
(ML)
SW201-C
SP502
SP501
M601
SW601
C654 0.022
C651 0.022
D651
1N4004
D652
1N4004
C652 0.022
C653 0.022
D654
1N4004
D653
1N4004
T601
POWER TRANSFOMER
SO651
CNP602
CNS602
R222
1K
R229
10K
R224
4.7K
R225
100K
R223
4.7K
R221
1K
R227 120
C219
0.047
(ML)
C220
0.047
(ML)
C216
0.039(ML)
C215
0.039
(ML)
R302
1.8K
C303
0.15/50
C304
0.15/50
3
2
1
1
2
3
4
5
6
7
8
9
10
11
12
13
M
1
2
3
1
2
3
1
2
2
2
R228 120
J201
HEADPHONES
Q201
2SC1815GR
Q202
2SC1815GR
D202
1N4148
F651
T1.25A L
250V
+B
+B
+B
BATTERYS
DC12V["D"size(UM/SUM-1,
R20 or HP2)battery x 8]
+B
+B
+B
+B
R-CH
L-CH
SPEAKERS
–
–
+
+
VOLUME
(241-7)
MAIN
(241-6)
TAPE
MOTOR
TERMINAL PWB-A3
X-BASS
R
P
TAPE
FM MONO
FM STEREO
CD
CD
FM STEREO
FM MONO
TAPE
TAPE
–
+
OUT
IN
VCO
kHz
AC INPUT
AC 230-240V
50 Hz
MAIN PWB-A1(2/2)
RECORD SIGNAL
PLAYBACK SIGNAL
CD SIGNAL
FM SIGNAL
AM SIGNAL
1
9
8
7
6
5
4
3
2
1
12
11
10
PIN
NO.
VOLTAGE
IC2
1.6V
1.6V
6V (6.3V)
0.2V (0.7V)
1.6V
0V
0V
0V
2.5V
2.5V
5.1V (6.6V)
0.8V (1V)
1.6V
6V (6.3V)
0.2V (0.7V)
1.6V
0V
0V
0V
2.5V
2.5V
5.1V (6.6V)
0.8V (1V)
21
20
19
18
17
16
15
14
13
24
23
22
PIN
NO.
VOLTAGE
1.2V (0V)
1.9V (1.6V)
1V (1.3V)
1.7V
1.5V (1.7V)
1.5V (1.5V)
0.4V (0.4V)
6.1V (6.4V)
6.1V (6.4V)
1.6V
1.6V
1.6V
1.9V (1.6V)
1V (1.3V)
1.7V
1.5V (1.7V)
1.5V (1.5V)
0.4V (0.4V)
6.1V (6.4V)
6.1V (6.4V)
1.6V
1.6V
1.6V
( ): AM
< >: Recording
[ ]: Play
[ ]: Play
9
8
7
6
5
4
3
2
1
12
11
10
PIN
NO.
VOLTAGE
IC101
<0V> [3.23V]
<0V> [0V]
<0.6V> [0.6V]
<0V> [0V]
<0V> [0V]
<0V> [0V]
<0V> [0V]
<7.43V> [7.43V]
<0V> [0V]
<7.37V> [7.37V]
<0.6V> [0.6V]
<3.3V> [3.3V]
<0V> [0V]
<0.6V> [0.6V]
<0V> [0V]
<0V> [0V]
<0V> [0V]
<0V> [0V]
<7.43V> [7.43V]
<0V> [0V]
<7.37V> [7.37V]
<0.6V> [0.6V]
<3.3V> [3.3V]
9
8
7
6
5
4
3
2
1
13
12
11
10
PIN
NO. VOLTAGE
IC202
0.1V
0V
11.2V
0V
11.3V
0V
0.1V
12V
10.4V
5.8V
0V
5.8V
10.4V
0V
11.2V
0V
11.3V
0V
0.1V
12V
10.4V
5.8V
0V
5.8V
10.4V
QT-CD121H/112H
– 24 –
Figure 24 WIRING OF P.W.BOARD (1/4)
A
B
C
D
E
F
G
H
1
2
3
4
5
6
• The numbers
1
to
12
are waveform numbers shown in page 28.
QT-CD121H
1
2
3
4
5
6
7
8
9
10
11
12
BK
WH
WH
WH
WH
WH
WH
WH
BR
GY
GY
GY
GY
GY
GY
GY
GY
GY
GY
BR
BK
BK
BK
BK
BK
BK
BK
BK
BK
BK
BK
BK
BK
BK
B
A
VOLUME
A
A
B
B
C
D
SW203
X-BASS
X-BASS
A
B
SW201
FUNCTION
FM AUTO
AM
TAPE
OFF
POWER
CD
ON
3
2
1
1 2 3
1
2
3
2
3
L3
AM BAR ANTENNA
TC1
TC2
TC3
TC4
VC4
VC3
VC2
VC1
C779
3
2
1
RX771
MAIN PWB-A1
1
2
3
4
5
6
7
8
IC201
R203
R228
R227
R209
R205
C205
R210
R225
R206
C211
C206
R211
C212
C208
R204
R212
C207
FW202
FW202
J201
HEADPHONES
1
5
R207
C204
R208
C210
R214
R213
C209
C203
C201
R202
C202
R201
R231
SW202
SURROUND
1
5
E C B
E C B
C108
C110
C848
C844
C843
C867
C873
C889
C846
C819
C817
C818
C231
C229
C120
C119
C123
C234
C122
C118
C114
C112
C111
C109
C113
C107
C116
C106
C352
C354
C105
C117
C222
C221
C220
C219
C223
C224
C704
C216
X701
XL801
C868
C890
C213
C214
C217
C218
C226
C233
C228
C232
C887
C215
Q804
Q351
C820
C869
C870
C705
C301
C302
C121
C230
C304
C303
C225
R302
R229
C701
C702
C115
C351
C353
R102
R108
R110
R840
R810
R877
R878
R824
R825
R124
D103
R118
R109
R101
R107
R116
R105
D101
R117
R458
L802
R874
R216
R215
R217
R304
R218
R234
R233
R222
R221
R123
R119
R842
R830
R714
R219
R115
R121
R113
R776
R779
R772
R773
R774
L801
ZD801
R457
R456
R455
R708
R715
R736
R724
R727
D201
D202
R771
R822
R823
R839
R831
R873
R880
R875
R876
R713
R709
R712
R711
R710
R220
R351
D102
R125
R223
R224
R104
R103
R120
R114
R106
R354
1
2
2
R353
R352
R122
IC802
SW102
CNP101
IC101
IC202
FW701
CNP201
LCD701
1
2
3
4
5
6
7
8
BI801
C227
J6
L301
CNP602
IC203
SW774
SW773
SW772
STOP
STOP
SW771
PLAY
PLAY
VR201
1
7
29
30
8
14
15
21
22
28
IC804
C807
C35
C27
C34
C15
C14
C29
C11
C36
C22
C24
C25
C23
C37
C8
C5
C6
C46
C33
C32
C17
C20
C26
C21
C837
C845
C850
C840
C802
C801
C803
C804
C806
C814
C812
C816
C832
C741
Q740
Q805
CF1
C38
C10
C39
C9
C4
C28
C31
C2
C16
C838
C839
C847
C841
C833
C851
C810
C815
C811
C849
C809
C808
C813
C805
C831
C830
C822
C740
C834
C842
C835
C821
R808
R811
R809
R829
R806
R807
R15
R13
R16
R14
R11
R29
R8
R27
R1
R2
R7
R9
R3
R802
R871
R801
R805
R827
R826
R814
R817
R832
R833
R745
R744
D741
R743
R25
R6
D1
R5
R38
D308
D309
R721
R730
R734
R17
R849
R836
R838
R857
R856
R816
R834
R835
R837
R803
R804
R812
R813
R815
R828
R819
R820
R821
R858
R860
D740
R740
R741
R742
R725
R716
R718
R735
R733
R719
R732
R720
R731
R722
R729
R723
R728
R726
D802
IC801
1
4
1
2 3 4
5 6 7
8 9
FW701
CNS802
BI802
IC2
VR1
L1
T2
L4
L2
F1
T1
T3
BI803
CNS803
IC701
IC1
CF2
1
1
2
3
4
5
3
4
5
1
2
3
4
5
2
3
4
5
6
1
2
3
4
5
2
3
4
5
6
5
1 2 3 4 5 6 7 8 9
10 11 12
15 14 13
18 17 16
21 20 19
24 23 22
1 2 3 4 5 6 7 8 9
10 11 12 13
1
4
5
10
15
20
25
30
48
49
50
55
60
35
40
45
HEADPHONES PWB-A4
CD LID
OPEN/CLOSE
SW761
SWITCH PWB-A2
CNS801
7
8
8
1
6
1 2 3
1 2 3 4
P.B REC
1
2
3
64
1
17
16
33 32
5
10
15
20
25
30
48
49
50
55
60
35
40
45
64
1
17
16
33 32
BK
BK
TRACK UP/CUE
TRACK DOWN/
REVIEW
2
3
4
5
1
7
8
9
6
11
10
12
5
10
15
20
25
30
48
49
50
55
60
35
40
45
64
1
17
16
33 32
1
8
C
A
E
B
H
D
G
F
VCO
COR1
E
B
C
B
C
B C E
E C B
B C E
Q201
Q202
REMOTE
CONTROL
CONTROL
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