DOWNLOAD Sharp QT-CD121H (serv.man2) Service Manual ↓ Size: 2.17 MB | Pages: 40 in PDF or view online for FREE

Model
QT-CD121H (serv.man2)
Pages
40
Size
2.17 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio / Portable
File
qt-cd121h-sm2.pdf
Date
PREV: Sharp QT-CD121H User Manual / Operation Manual

Sharp QT-CD121H (serv.man2) Service Manual ▷ View online

QT-CD121H/112H
– 13 –
Figure 13 BLOCK DIAGRAM (2/4)
QT-CD121H
2
6
2
3
3
4
4
5
5
5
1
1
1
7
7
8
8
8
9
9
2
6
6
2
3
4
5
6
7
10
12
13
14
15
15
11
11
17
18
19
12
10
22
23
24
21
20
5
1
8
9
6
12
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
WOOFER
SP503
TWEETER
SPEAKERS
SP502
WOOFER
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/DISPLAY
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
T601
POWER
TRANSFORMER
BATTERY
DC12V
[' D' SIZE (UM/SUM-1,
R20 or HP-2)BATTERYx8]
AC INPUT
AC 230-240V
50Hz
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.
F651
T1.25A L
250V
MUTE
SP504
TWEETER
L-CH
R-CH
QT-CD121H/112H
– 14 –
Figure 14 BLOCK DIAGRAM (3/4)
QT-CD112H
6
2
5
1
3
7
4
6
5
6
3
9
5
5
3
8
5
4
3
3
5
3
3
2
1
1
8
4
2
2
1
2
5
2
0
3
8
3
4
3
5
3
6
~
+
5
V
F
O
C
U
S
 C
O
IL
T
R
A
C
K
IN
G
 C
O
IL
P
IC
K
U
P
 U
N
IT
3
1
0
1
9
2
3
2
5
1
2
1
7
1
1
1
8
1
2
4
9
5
0
5
2
5
3
5
1
5
4
Q
8
0
4
+
5
V
2
3
6
6
3
4
3
6
4
1
0
4
4
1
2
4
5
9
1
4
1
3
4
3
1
6
4
4
1
7
1
8
1
9
2
0
1
5
3
2
4
0
1
6
1
5
8
5
7
C
L
, 
D
A
T
, 
S
E
L
IA
L
 C
O
N
T
R
O
L
C
O
N
S
T
A
N
T
V
O
L
T
A
G
E
R
E
G
U
L
A
T
O
R
1
6
2
7
3
1
2
8
1
5
3
0
2
9
M
M
M
O
T
O
R
S
L
ID
E
M
O
T
O
R
S
P
IN
1
2
3
4
9
~
~
1
7
1
4
XIN
XO
UT
K1
C
D
O
P
E
R
A
T
IO
N
K
E
Y
S
W
7
7
1
~
S
W
7
7
4
L
ID
S
W
7
6
1
O
P
E
N
/C
L
O
S
E
~
~
5
7
2
4
2
7
2
8
3
1
3
0
6
0
4
1
4
4
3
3
2
2
2
3
3
7
C
D
 L
C
D
L
C
D
7
0
1
P
IC
K
U
P
 I
N
P
U
-I
N
 S
W
1
9
1
3
1
4
S
L
+
S
L
–
+
7
.4
V
(C
D
)
1
2
3
4
5
6
7
G
N
D
 (
A
)
R
-C
H
L
-C
H
G
N
D
 (
D
)
P
O
W
E
R
 G
N
D
+
7
.4
V
 (
D
)
S
E
C
T
IO
N
M
A
IN
T
O
VV
DD
XIN
XO
UT
VD
D
XV
DD
E
F
M
O
E
F
M
IN
C
L
V
+
C
L
V
–
V
/P
H
F
L
T
E
S
T
O
F
F
J
P
–
J
P
+
T
G
L
R
E
S
. 
C
Q
C
K
. 
C
O
IN
S
Q
O
U
T
. 
R
W
C
. 
W
R
Q
L
C
H
O
L
C
7
8
6
2
2
E
IC
8
0
2
S
E
R
V
O
/S
IG
N
A
L
C
O
N
T
R
O
L
1
6
.9
3
M
H
z
X
L
8
0
1
S
L
I
S
L
C
C
V
+
J
P
–
DR
F
CE 
DA
T
CL 
CL
K
TH
LD
/D
EF
SL
D
SL
EO
SP
O
FD 
TO
S
L
+
S
L
–
F
E
F
IN
1
F
IN
2
6
4
6
2
+
5
V
Q
8
0
5
VC
C1
LD
O
L
A
S
E
R
D
R
IV
E
R
S
E
R
V
O
 A
M
P
.
L
A
9
2
4
0
M
IC
8
0
1
2
2
2
+
7
.4
V
7
5
6
8
2
8
2
6
1
3
2
7
IC
8
0
4
B
A
5
9
1
4
F
P
F
O
C
U
S
/T
R
A
C
K
IN
G
/S
P
IN
/S
L
ID
E
D
R
IV
E
R
M
7
0
1
M
7
0
2
S
W
7
0
2
RE
S
SL
–
DR
F
WR
Q
RE
SE
T
V
L
C
3
V
D
D
+
5
V
(D
)
4
M
H
z
X
7
0
1
IC
7
0
1
IX
0
1
0
5
A
W
S
Y
S
T
E
M
M
IC
R
O
C
O
M
P
U
T
E
R
CO
M0
SE
G1
SE
G4
CO
M3
C
D
 L
ID
M
U
T
E
QT-CD121H/112H
– 15 –
Figure 15 BLOCK DIAGRAM (4/4)
QT-CD112H
2
6
2
3
3
4
4
5
5
5
1
1
1
7
7
8
8
8
9
9
2
6
6
2
3
4
5
6
7
10
12
13
14
15
15
11
11
17
18
19
12
10
22
23
24
21
20
5
1
8
9
6
12
FM ROD ANTENNA
F1
B.P.F
L1
FM RF
L3
MW 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
SW OSC.
L4
MW OSC.
AM / FM
SELECT
+B
VR1
VCO
TUNER
+B
IC501
LA4597
POWER AMP.
L
VOLUME
X-BASS
SW203
A,B
VR201
A,B
STANBY
R
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/DISPLAY
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
T601
POWER
TRANSFORMER
BATTERY
DC12V
[' D' SIZE (UM/SUM-1,
R20 or HP-2)BATTERYx8]
AC INPUT
AC 230-240V
50Hz
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
F651
T1.25A L
250V
MUTE
SW1-A
BAND
SW1-C
BAND
L6
SW ANT.
SW1-E
BAND
QT-CD121H/112H
– 16 –
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.
Figure 16 SCHEMATIC DIAGRAM (1/8)
QT-CD121H
2
3
1
C779 10/16
R779
47
LCD701
1
2
3
4
5
6
7
8
FW701
IC701
IX0105AW
SYSTEM
MICROCOMPUTER
R822
6.8K
IC801
LA9241M
SERVO AMP.
C835 0.1/50
C837 10/16
C838 0.01
C839 1/50
C840 0.33/50
R803
15K
R802
100K
C805
0.033
R804
2.2K
C804
0.001
R808
12K
C810
180P
R809
27K
R807
1K
C809
0.047
R811
3.3K
C808
0.068
R805
6.8K
C806
0.033
C807
0.1/50
R806
100
C803
0.1/50
R833
5.6K
R835
470
C830
2P
(CH)
C833
0.001
R836
47K
C834
0.033
R832
56K
C83
27P
(CH
C822
220P
R810
82K
C821
1/50
R828
1K
R839
22K
R840
22K
C813
0.1
R812
15K
R829
1K
R814
10K
R815
47K
C812
330P
R816
1.5K
C814
0.01
R813
33K
R820
10K
R819
39K
R817
82K
C815
0.0047
R821 56K
C816 0.001
R830
1K
R824
10K
C818
1/50
C819
47/16
R825
1.2K
R826 220K
C820 0.0033
R827 220K
C817
0.47/50
R823 1.2K
C811
0.1
R709
1K
R712
1K
R710
10K
R711
2.7K
C704
100/10
C705
0.022
R713
1K
R736
1K
C702
0.022
R708
1K
R716 10K
R735 1K
R718 15K
R720 15K
R722 15K
R719 15K
R723 15K
R725 15K
R734
1K
R730
1K
R721 15K
R724 15K
R727
1K
R726 1K
R728 1K
R729 1K
R731 1K
R732 1K
R733 1K
X701
4MHz
R745
10K
D741
1N4148
R744
10K
C741
3.3/50
R742
1K
R743
100K
R740
4.7K
R741
3.3K
D740 1N4148
Q740
2SC1815GR
C740
0.01
R714
10K
R715
15K
C701 0.022
R831
1K
Q805
S9012H
C849
0.022
R842
22
C848
1/50
C850
0.1
C845
4.7/50
R871
4.7K
R772 2.7K
R771 3.9K
R773 1.8K
SW772
STOP
SW771
PLAY/
REPEAT
RX771
SW774
TRACK DOWN/
REVIEW
10K
R776
R774 1.5K
SW773
TRACK UP/ CUE
SW761
CD LID
OPEN/CLOSE
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33
32
31
30
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
1
2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
15
16
17 18
19 20
21
22 23
24
25 26
27 28
29
30 31 32
33
34
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
REMOTE
SENSOR
+B
+B
+B
+B
+B
4
1
1
2
4
1
RES
CQCK
CO IN
RWC
SL+
SL–
DRF
SQOUT
WRQ
PU IN
DIGITAL GND
5V
+B
+B
+B
+B
+B
SEG12
SEG11
SEG10
SEG9
SEG8
SEG7
SEG6
SEG5
SEG4
SEG3
SEG2
SEG1
SEG0
P00
P01
P02
P10
   POWER IN
D1 MUTE
D4 COCK
D3 RES
D5 COIN
D6 RWC
D7 SL+
D8 SL–
DFR P20
SQOUT P21
WRQ P22
PU-IN P23
RESET
XIN
XOUT
VSS
VDD
XCOUT
XCIN
AVSS
VREF
P30
P31
P32
P33
P3P40
AIN5
SIMUKE AIN6
KIDSW AIN7
VLC3
VLC2
VLC1
COM3
COM2
COM1
COM0
SEG16
VCC1
LDS
LDD
BH1
PH1
LF2
VR
REFI
VCC2
FSS
DRF
CE
DAT
CL
CLK
DEF
NC
TBC
FSC
GND
SLI
SLC
RFS–
RFSM
CV+
CV–
SLOF
HFL
TES
TOFF
TGL
JP+
JP–
A GND
FE–
FE
FA–
FA
TO
JP
TE
TE–
TESI
TH
SCI
TA
TD–
TD
TB
F
E
FIN1
FIN2
FD–
FD
SPD
SP–
SPG
SP
SL+
SL–
SLD
SLEQ
VREF
GND
SWITCH PWB-A2
CD SIGNAL
MAIN PWB(1/2)
9
8
7
6
5
4
3
2
1
12
11
10
PIN
NO. VOLTAGE
IC701
0V
0V
0V
0V
0V
0V
3.9V
0V
5V
4.1V
4.1V
0V
0V
0V
0.4V
0.4V
0V
0V
0V
0V
5V
2.5V
2.5V
0V
5V
5V
0V
0V
5V
4.8V
0V
3.8V
41
40
39
38
37
36
35
34
33
44
43
42
15
14
13
47
46
45
18
17
16
50
49
48
21
20
19
53
52
51
23
22
55
54
26
25
24
58
57
56
29
28
27
61
60
59
32
31
30
64
63
62
PIN
NO. VOLTAGE
5V
0V
0V
0V
0.4V
5V
3.1V
1.5V
2.4V
2.4V
2.4V
2.4V
2.4V
2.4V
2.4V
2.4V
2.4V
2.4V
2.4V
2.4V
2.4V
2.4V
2.4V
2.4V
2.4V
2.4V
2.4V
2.4V
2.4V
0V
0V
0V
9
8
7
6
5
4
3
2
1
12
11
10
PIN
NO. VOLTAGE
IC801
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
0V
15
14
13
47
46
45
41
40
39
38
37
36
35
34
33
44
43
42
18
17
16
50
49
48
21
20
19
53
52
51
23
22
55
54
26
25
24
58
57
56
29
28
27
61
60
59
32
31
30
64
63
62
PIN
NO. VOLTAGE
PIN
NO. VOLTAGE
0V
2.5V
2.5V
0V
0V
2.4V
4.1V
4.7V
0V
0V
5V
5V
2.5V
2.5V
0.9V
0.9V
2.1V
4.2V
0V
5V
9
8
7
6
5
4
3
2
1
12
11
10
PIN
NO. VOLTAGE
IC802
0V
0V
1.5V
0V
2V
5V
0.3V
0V
2.5V
2.5V
0V
0V
0V
5V
0V
4.8V
5V
5V
0V
0V
2.5V
0V
41
40
39
38
37
36
35
34
33
44
43
42
15
14
13
47
46
45
18
17
16
50
49
48
21
20
19
53
52
51
23
22
55
54
26
25
24
58
57
56
29
28
27
61
60
59
32
31
30
64
63
62
PIN
NO. VOLTAGE
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
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.2V
2.2V
0V
0V
5V
5V
4.8V
0V
5V
0V
0V
1.5V
2.4V
2.5V
2.5V
5V
0V
0V
0V
0V
0V
0V
5V
2.5V
0V
0V
0V
5V
4.7V
2V
0V
0V
2V
4.7V
0V
5V
2.3V
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