Read Sharp QT-CD250 (serv.man6) Service Manual online
QT-CD250H/W
– 15 –
Figure 15 SCHEMATIC DIAGRAM (2/2)
7
8
9
10
11
12
• NOTES ON SCHEMATIC DIAGRAM can be found on page 18.
+B
C302
0.022
0.022
C872
0.0047
C249
100P C204
0.022
D202
1N4148
C870
100P
100P
R871
4.7K
4.7K
R253
3.9K
R856
15K
FW801
FW802
R214
1K
R215
1K
R216
1K
R210
1K
1K
R209
1K
1K
R218
8.2K
R217
8.2K
D806
1N4148
1N4148
R862
47K
47K
1
C201
100/16
100/16
C230
1/50
1/50
R222
4.7K
4.7K
C214
0.1/50
0.1/50
R221
4.7K
4.7K
C213
0.1/50
0.1/50
R870
4.7K
R869
4.7K
LCD801
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
CNP602
CNS602
SW809
X-BASS
X-BASS
R857
47K
47K
R854
100
100
C226
0.022
0.022
CNS801
CNP801
D803
1N4148
R855
18K
18K
R841
5.6K
5.6K
R848
10K
10K
R849
18K
18K
R847
5.6K
5.6K
R843
4.7K
4.7K
R846
4.7K
4.7K
R821
1K
1K
R876
10K
10K
C862
0.1
0.1
X802
4.19MHz
4.19MHz
C846
1/50
D805
1N4148
C211
0.047
0.047
C212
0.047
R202
10K
R205
4.7K
4.7K
C203
0.01
C202
47/16
47/16
R201
1.2K
1.2K
R203
270
270
ZD201
DZ5.1BSB
D203
1N4148
R901
47K
47K
R900
47K
47K
R899
47K
47K
R898
47K
47K
R897
47K
47K
R896
47K
47K
R895
47K
47K
R894
47K
47K
R893
47K
47K
R892
47K
47K
R891
47K
47K
R890
47K
47K
R889
47K
47K
R888
47K
47K
R887
47K
47K
R886
47K
47K
R885
47K
47K
R884
47K
47K
R883
47K
47K
R882
47K
47K
C865
100/10
C864
0.1
R873
4.7K
4.7K
R878
10K
10K
R877
10K
10K
R875
10K
10K
R868
4.7K
C231
1/50
1/50
R251
22K
22K
R252
22K
22K
C229
1/50
1/50
D801
1N4148
C245
1/50
C243
330P
C244
330P
R242
10K
10K
R241
10K
10K
C242
1/50
1/50
C241
1/50
1/50
R240
2.2K
2.2K
R239
2.2K
2.2K
R238
2.7K
2.7K
R237
2.7K
2.7K
C232
1/50
1/50
R872
4.7K
4.7K
R867
4.7K
R825
10K
10K
R839
47K
R860
4.7K
R863
1.8K
C847
22/16
C848
22/16
C853
0.022
C844
100/10
R836
270
270
R835
270
270
C220
0.1/50
0.1/50
C219
0.1/50
0.1/50
C210
0.022
D204
1N4148
D205
1N4148
R206
560
560
R204
2.2K
2.2K
C206
47/16
C209
0.01
ZD202
DZ7.5BSB
R213
100
100
R212
47K
R211
47K
R225
100K
100K
C653
0.022
D653
1N4004
D652
1N4004
C652
0.022
D654
1N4004
D651
1N4004
C654
0.022
C651
0.022
R249
220
220
R224
4.7K
4.7K
C246
10/16
10/16
R223
4.7K
4.7K
C825
47/16
47/16
D201
1N4148
R864
1M
L801
220
220
µ
H
R250
470K
470K
C247
220/10
R247
560
R248
560
R246
5.6K
5.6K
R244
560K
560K
R243
560K
560K
R245
5.6K
5.6K
SW201-D
SW201-A
R354
4.7
4.7
51
5MHz
R456
15K
15K
R458
1K
1K
R457
1K
1K
R455
15K
15K
ZD203
ZD2.4BSB
ZD2.4BSB
C810
10/16
10/16
R808
100
100
C830
0.01(ML)
0.01(ML)
C828
0.0027
0.0027
C829
0.0047
0.0047
R832
3.3K
3.3K
C827
0.015(ML)
0.015(ML)
R827
15K
15K
R831
3.3K
3.3K
R830
10K
10K
R829
3.3K
3.3K
R812
1K
1K
R834
3.3K
3.3K
C833
0.033(ML)
0.033(ML)
R833
3.3K
3.3K
C823
0.022
C840
0.1
0.1
C854
0.0068
0.0068
IC802
SERVO/
SIGNAL
CONTROL
TC9457F2
100
99
98
97
96
95
94
93
92
91
90
89
88
87
86
85
84
83
82
81
80
79
78
77
76
75
74
73
72
71
70
69
68
67
66
65
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
29
28
27
26
25
24
23
22
21
20
19
18
17
16
16
15
14
13
12
11
10
9
8
7
6
5
4
4
3
2
1
C852
3.3/50
3.3/50
C851
3.3/50
3.3/50
C849
0.0022
0.0022
C850
0.0022
0.0022
R844
22K
C826
47P
47P
R824
10K
10K
R826
220K
R842
22K
R838
10K
10K
R837
10K
10K
R207
560
560
C207
470/10
470/10
C208
0.022
0.022
C205
47/16
47/16
C218
0.0039(ML)
C217
0.0039(ML)
R220
220K
IC202
16
15
14
13
12
11
10
9
8 7 6 5
4
3 2 1
C216
0.039(ML)
R219
220K
C215
0.039(ML)
C236
100/10
R232
120
C221
0.001
C222
0.001
C235
100/10
R231
120
120
C225
100/10
14
13
12
2
3
9
5
6
7
8
4
10
11
1
C239
0.1(ML)
0.1(ML)
C238
100/10
C237
100/10
100/10
C234
1000/10
1000/10
C233
1000/10
1000/10
CNP201
R228
120
120
R227
120
120
HPJ201
HEADPHONES
HEADPHONES
R820
47K
X801
16.93MHz
ML)
C824
47/16
ML)
C845
0.047
0.047
ML)
R828
10K
10K
R840
10
10
C227
4700/16
NC
NC
NC
NC
NC
X-BASS
SWITCH PWB-A4
P_MUTE
STB_(VOL)
CE_(PLL)
CD
POWER
POWER
HOLD
7.5V
5V
X-BASS
TUNER-
FUNC
FUNC
SEG17
CL
DI
DO
CD-FUNC
KEY2
KEY1
ADIN3
SEG16
SEG15
VSS
STB
DATA
CK
CS
+5V(u COM)
+4.5V(BACK UP)
DC 9V ["D" size (UM/SUM-1,R20 or
HP-2) battery x 6]
HP-2) battery x 6]
TAPE
TUN
TUN
ST
MEMORY
KHz
MHz
CNS201
BATTERY
NC
NC
NC
NC
SP202
SP201
POWER PWB-A3
R-CH(CD)
L-CH(CD)
GND(AUDIO)
GND(POWER)
GND(CD)
SPEAKERS
L-CH
R-CH
4 OHM
4 OHM
+5V(CD)
SELECTOR
-
+
SW601
TAPE
MAIN
TAPE
MAIN
M601
TAPE
MOTOR
TAPE
MOTOR
TAPE
CD
CD
AC/DC
AC INPUT
-
-
+
+
IC201
TA8227P
POWER AMP.
MVSS1
MVDD1
SEG1
COM1
MVDD
MVSS
MXI
MXO
REMO-IN
RESET
DVSL
LO
DVRL
DVDD
DVRR
RO
DVSR
TEST0
DOUT
SBSY
SBOK
VDD1
VSS1
P2VREF
PDO
TMAX
LPFN
LPFO
PVREF
VCOF
AVSS
SLCO
RFI
AVDD
RFCT
RFZI
RFRP
FEI
SBAD
TEI
TEZI
FOO
TRO
VREF
RFGC
TEBC
FMO
DMO
2VREF
SEL
VDD2
VSS2
XI
XO
XVDD
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
SEG8
SEG9
SEG10
SEG11
SEG12
SEG13
SEG14
DOOR IN
PU IN
TEST1
TEST2
TEST3
TEST4
TEST5
XVSS
COM2
COM3
COM4
NC
CD CONTROL PWB-A2
SO651
AC INPUT
SOCKET
AC INPUT
SOCKET
T651
POWER
TRANSFORMER
12
12
1
2
3
2
4
1
3
2
4
1
3
Q204
KTA1273Y
KTA1273Y
16
17
18
19
1
4
3
2
M
1
2
3
1
2
3
199 GR
Q210
KTC3199 GR
KTC3199 GR
Q209
KTC3199 GR
KTC3199 GR
1
2
3
Q805
KRC107 M
KRC107 M
2
3
Q804
KTA1266 GR
SWITCHING
KTA1266 GR
SWITCHING
Q2
A102 M
UNER
THCING
Q211
KTC3199 GR
Q212
KTC3199 GR
Q205
KTC3199 GR
Q206
KTA1046 Y
KTA1046 Y
Q207
KTC3199 GR
Q203
KTA1266 GR
KTA1266 GR
C240
0.1(ML)
0.1(ML)
Q201
KTC3199 GR
Q202
KTC3199 GR
VDD
11
11
10
10
9
9
7
7
6
6
5
5
4
4
1
1
2
2
3
3
8
8
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10
11
11
SW808
VOLUME DOWN
SW807
VOLUME UP
UN801
REMOTE SENSOR
N64H380A
3
1
2
3
DC 4.5V ["AA" size (UM/SUM-3,R6 or
HP-7) battery x 3 for backup memory]
HP-7) battery x 3 for backup memory]
BATTERY
LCD DISPLAY
TERMINAL A PWB-A5/
TERMINAL B PWB-A6
TERMINAL B PWB-A6
MAIN PWB-A1
5.0V
0.6V(TUN: 5.0V)
4.9V(TUN: 0V)
0V
5.0V(TUN:0V)
0V(TUN: 5.0V)
5.0V
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
5.0V
0V(TUN: 4.9V)
5.0V
(TUN:0V)
0V
GND
GND
GND
GND
GND
GND
GND
0V
0V
0V(TUN:5.0V)
0V(X-BASS OFF:4.9V)
4.4V(TUN:0V)
GND
3.7V
(TUN:0V)
1.9V
(TUN:0V)
0V
1.5V
(TUN:0V)
3.7V
(TUN:0V)
1.9V
(TUN:0V)
1.7V
(TUN:0V)
GND
1.9V(TUN:0V)
1.9V(TUN:0V)
4.4V(TUN:0V)
1.9V(TUN:0V)
1.9V(TUN:0V)
0.9V(TUN:0V)
1.9V(TUN:0V)
0.7V(TUN:0V)
1.9V(TUN:0V)
1.9V(TUN:0V)
1.9V(TUN:0V)
1.9V(TUN:0V)
1.9V(TUN:0V)
0.5V(TUN:0V)
0V
1.9V(TUN:0V)
1.9V(TUN:0V)
3.7V(TUN:0V)
0V
4.4V(TUN:0V)
GND
GND
2.0V(TUN:0V)
(TUN:0V)
4.4V
(TUN:0V)
GND
2.2V
(TUN:0V)
2.1V
(TUN:0V)
4.2V(TUN:0V)
2.1V(TUN:0V)
2.2V(TUN:0V)
GND
GND
GND
5V
5V
5V
2.5V
2.4V
GND
5.0V
2.3V
2.3V
2.3V
2.3V
5.0V
5.0V
4.4V
GND
0V
(TUN:7.5V)
(TUN:7.5V)
4.4V
SWITCHING
RECORD SIGNAL
PLAYBACK SIGNAL
CD SIGNAL
FM SIGNAL
AM SIGNAL
13
12
5
7
1
6
11
14
15
4
17
16
R AMP.
IC202
ELECTRONIC
VOLUME
TC9260P
ELECTRONIC
VOLUME
TC9260P
+
-
+
-
SW201
FUNCTION
SELECTOR
FUNCTION
SELECTOR
SW201
FUNCTION
SELECTOR
FUNCTION
SELECTOR
1
2
SW801
PLAY/PAUSE/
TUNING UP
SW802
STOP/
TUNING
DOWN
SW803
REPEAT/
BAND
SW804
TUNER/
MEMORY
SW805
CUE/
PRESET
UP
SW806
REVIEW/
PRESET
DOWN
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B
5.0V
0.4V)
GND
(CD: OPEN)
8.2V-
8.4V
8.4V
4.5V-
4.2V
4.2V
8.6V-
8.0V
8.0V
GND
0.6V
0V
0V
0.6V
5.0V-
4.6V
4.6V
8.6V-
8.0V
8.0V
4.5V-
4.2V
4.2V
9.0V
GND
GND
GND
2.5V
2.5V
0V
2.5V
GND
0V
0V
0V
2.5V
2.5V
2.5V
2.5V
2.5V
4.6V
0V
0V
(REC: 4.0V)
0.4V)
OSC.
0V
GND
0V(OFF:0.6V)
0V(OFF:0.6V)
0V
GND
0.2V
0.2V
2.0V
2.0V
0.8V
0.8V
0.V
0V
GND
GND
0V(ON:0.6V)
0V(ON:0.6V)
4.8V(ON:4.4V)
0V
(ON:4.4V)
4.4V(ON:3.8V)
SWITCHING MUTE
MUTE
MUTE
9V
7.5V
8.4V
7.0V
8.4V
0V
7.5V REGULATOR
7.5V
REGULATOR
7.5V
5.0V
7.0V
4.4V
7.0V
4.9V
Q204,Q205:5V
REGULATOR
REGULATOR
Q211,Q212
LINE AMP
LINE AMP
R859
47K
47K
R880
22K
QT-CD250H
ONLY
F651
T1.25A L
250V
SW651
VOLTAGE
SELECTOR
VOLTAGE
SELECTOR
AC220-240V
AC110-127V
AC110V-127V/
220V-240V,50/60Hz
T651
POWER
TRANSFORMER
SELECTOR
AC/DC
AC INPUT
FOR QT-CD250W
SO651
AC INPUT
SOCKET
AC INPUT
SOCKET
For U.K./Europe/Australia/New Zealand;
AC230-240V,50Hz
For Philippines; AC220V,60Hz
AC230-240V,50Hz
For Philippines; AC220V,60Hz
FOR QT-CD250H
QT-CD250W
ONLY
ONLY
UN801
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