Sharp SD-PX15H (serv.man20) Service Manual ▷ View online
SD-PX15H
4 – 15
1
3
4
5
1
2
3
4
+5V
VIDEO_MUTE
SP
_RELAY
1
ECTION
CN3201
TO DVD SERVOSECTION
Q602
CNP409
TO
DSP
S
ECTION
C
G
Y
G
CNP601
1
2
3
4
5
6
7
8
9
10
11
12
13
14
1 2 3
R
L
L
B
G
R
V
A.GND
FUNC
BLANK
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
RO
U
T
RO
U
T
DVD FLASH
YO
U
T
VO
U
T
BO
U
T
BO
U
T
TXD
ASPECT
RXD
CO
U
T
GO
U
T
DG
N
D
DG
N
D
YO
U
T
GO
U
T
V
GND
V
GND
CO
U
T
VO
U
T
TXD
RXD
L
AGND
A+12V
R
AGND
1
3
4
5
6
6
2
1
3
4
5
5
S-VIDEO
OUTPUT
VIDEO
OUTPUT
CNP604
ZD601
D607
Q614
BI605
CNS409
JK601
SO602
SO601
SCART OUTPUT
D606
Q617
Q619
Q615
D605
Q616
Q618
Q620
Q621
BI602
CNS602
Figure 4-15 BLOCK DIAGRAM (15/15)
SD-PX15H
5 – 1
Audio
SD-PX15H
Service Manual
SD-PX15H
Market
E
CHAPTER 5.
CIRCUIT DESCRIPTION
[1] Notes on schematic diagram
• Resistor:
To differentiate the units of resistors, such symbol as K and M are
used: the symbol K means 1000 ohm and the symbol M means
1000 kohm and the resistor without any symbol is ohm-type resis-
tor. Besides, the one with “Fusible” is a fuse type.
used: the symbol K means 1000 ohm and the symbol M means
1000 kohm and the resistor without any symbol is ohm-type resis-
tor. Besides, the one with “Fusible” is a fuse type.
• Capacitor:
To indicate the unit of capacitor, a symbol P is used: this symbol P
means pico-farad and the unit of the capacitor without such a sym-
bol is microfarad. As to electrolytic capacitor, the expression
“capacitance/withstand voltage” is used.
(CH), (TH), (RH), (UJ): Temperature compensation
(ML): Mylar type
(P.P.): Polypropylene type
means pico-farad and the unit of the capacitor without such a sym-
bol is microfarad. As to electrolytic capacitor, the expression
“capacitance/withstand voltage” is used.
(CH), (TH), (RH), (UJ): Temperature compensation
(ML): Mylar type
(P.P.): Polypropylene type
• Schematic diagram and Wiring Side of P.W.Board for this model are
subject to change for improvement without prior notice.
• The indicated voltage in each section is the one measured by Digi-
tal Multimeter between such a section and the chassis with no sig-
nal given.
nal given.
1. In the tuner section,
indicates AM
indicates FM stereo
indicates AM
indicates FM stereo
2. In the main section, a tape is being played back.
3. In the deck section, a tape is being played back.
( ) indicates the record state.
( ) indicates the record state.
4. In the power section, a tape is being played back.
5. In the CD section, the CD is stopped.
• Parts marked with “
“ (
) are important for main-
taining the safety of the set. Be sure to replace these parts with
specified ones for maintaining the safety and performance of the
set.
specified ones for maintaining the safety and performance of the
set.
[2] Types of transistor and LED
REF NO.
DESCRIPTION
POSITION
SW001
STOP
ON-OFF
SW002
POWER
ON-OFF
SW003
VOLUME
ON-OFF
SW004
PLAY
ON-OFF
SW005
FUNCTION
ON-OFF
SW006
SKIP UP
ON-OFF
SW007
TUNER (BAND)
ON-OFF
SW008
EJECT
ON-OFF
SW009
SKIP DOWN
ON-OFF
SW010
OPEN/CLOSE
ON-OFF
REF NO.
DESCRIPTION
POSITION
2SB709 AR
2SD601 AR
KRA105 S
KRA106 S
KRA107 S
KRC102 S
KRC104 S
KRC106 S
2SD601 AR
KRA105 S
KRA106 S
KRA107 S
KRC102 S
KRC104 S
KRC106 S
B
(3)
E
(1)
C
(2)
TOP
VIEW
KTA1023 Y
KTA1266 GR
KTC2874 B
KTC3199 GR
KTA1266 GR
KTC2874 B
KTC3199 GR
VIEW
FRONT
E C B
(S)(G)(D)
VIEW
FRONT
Cathode Anode
(1)(2)(3)
2SA2012
2SC5565
KTC4375 Y
2SC5565
KTC4375 Y
B C E
D5SB60
S1VBA60
S1VBA60
A C
A C
VIEW
FRONT
2647RT47
SELU2E10
FRONT
VIEW
VIEW
KRC107 S
KTA1504 GR
KTA1298 Y
KTC2875 B
KTC3265 Y
KTC3875 GR
CPH3122
KTA1504 GR
KTA1298 Y
KTC2875 B
KTC3265 Y
KTC3875 GR
CPH3122
FMLG22S
KDS226
KDS184
KDS184
TOP VIEW
SD-PX15H
5 – 2
[3] Waveforms of 1-BIT circuit
[4] Waveforms of DVD circuit
T
2
1
2.00V/div
500 ns/div
194.545465 µs
520 mV
2.00V/div
AD IC Output
+ Side
- Side
5 V
Amplitude
from 0 to 5 V
from 0 to 5 V
1
2
2
2
1
2.00 V/div
500 ns/div
194.545465 µs
-12.30 V
2.00 V/div
AD IC NF IN
In partial pressure OUT, 4 to 7 V amplitude
of GND reference is observed.
In IC of 75 kohms, the reference is 2.5 V
because of VREF. Due to imaginary GND
of operational amplifier inside IC, the
waveform cannot be monitored.
This waveform is partial pressure OUT.
of GND reference is observed.
In IC of 75 kohms, the reference is 2.5 V
because of VREF. Due to imaginary GND
of operational amplifier inside IC, the
waveform cannot be monitored.
This waveform is partial pressure OUT.
3
4
T
2.00 V/div
50.0 ns/div
0.0 s
-12.30 V
2.00 V/div
LEVEL SHIFT OUT
DEAD TIME
ZOOM UP
Dead time is generated by level
shift input.
Leading edge is delayed at CR,
passing R at DI.
Set value: 20 - 25 nsec.
shift input.
Leading edge is delayed at CR,
passing R at DI.
Set value: 20 - 25 nsec.
5
6
6
T
10.0 V/div
500 ns/div
194.545465 µs
-12.3 V
10.0 V/div
+ SIDE
+ FETOUT
- SIDE
Waveforms before low-pass filters at both
ends of the speaker.
H-bridge may be considered as BTL.
However, here and at the gate drive, dead
time is not observed; since bootstrap
operates based on output, DEAD TIME
part is in floating condition. The waveform
on the HIGH side shows that only the
booted voltage lowers.
ends of the speaker.
H-bridge may be considered as BTL.
However, here and at the gate drive, dead
time is not observed; since bootstrap
operates based on output, DEAD TIME
part is in floating condition. The waveform
on the HIGH side shows that only the
booted voltage lowers.
2
1
7
8
8
DVD_CS IN
1
S_DIN
2
S_DOUT
3
SCLK OUT
4
2003/10/16 13:19:45
Stopped
Stopped
Normal
20 MS/s 50 µs/div
20 MS/s 50 µs/div
786
CH1 10:1
0.500 V/div
DC 10kHz
CH2 10:1
0.500 V/div
DC Full
CH3 10:1
0.500 V/div
DC Full
CH4 10:1
0.500 V/div
DC Full
0.500 V/div
DC 10kHz
CH2 10:1
0.500 V/div
DC Full
CH3 10:1
0.500 V/div
DC Full
CH4 10:1
0.500 V/div
DC Full
Edge CH1
Auto
0.400 V
Auto
0.400 V
SIMPLE
Level
1.000 V
SD-PX15H
5 – 3
[5] Voltage
PIN NO. VOLTAGE
PIN NO. VOLTAGE
1
3.5 V
65
0 V
2
2.5 V
2.5 V
2.5 V
66
67
68
67
68
2.9 V
3
4
5
4
5
2.7 V
0 V
69
0 V
3.1 V
1.3 V
6
2.3 V
70
1.7 V
7
3.5 V
71
1.7 V
8
3.5 V
2.3 V
2.3 V
72
73
73
0 V
0 V
0 V
9
10
2.3 V
74
3.4 V
11
0 V
75
3.4 V
12
2.6 V
76
3.4 V
13
2.6 V
77
3.4 V
14
3.5 V
1.3 V
1.3 V
78
1.7 V
15
79
3.5 V
16
0 V
80
0 V
17
0 V
81
3.4 V
18
3.5 V
2.7 V
2.7 V
82
0 V
19
83
3.4 V
20
0.8 V
2.7 V
2.7 V
3.5 V
0 V
3.1 V
0 V
0.5 V
0.5 V
3.5 V
0 V
2.7 V
2.7 V
3.5 V
0 V
3.1 V
0 V
0.5 V
0.5 V
3.5 V
0 V
84
0 V
21
85
0 V
22
86
0 V
23
87
0 V
24
88
0 V
25
89
0 V
26
90
0 V
27
91
3.5 V
28
92
1.7 V
29
93
0 V
30
94
0 V
31
2.8 V
95
3.4 V
32
33
33
0.7 V
96
0 V
2.9 V
97
0 V
34
2.7 V
98
1.3 V
35
2.6 V
0.7 V
0.7 V
99
0 V
36
100
0 V
37
2.6 V
101
3.4 V
38
0 V
0 V
0 V
102
0 V
0 V
3.4 V
0 V
3.4 V
39
103
40
0.5 V
104
41
0.7 V
105
0.9 V
42
3.5 V
106
0 V
43
0 V
107
0.8 V
44
2.7 V
0.7 V
0.7 V
108
1.6 V
45
109
2.1 V
46
2.9 V
110
2.6 V
47
3.4 V
111
2.1 V
48
112
1.1 V
49
0 V
0 V
113
2 V
50
0 V
114
1.6 V
IC3001
51
0 V
52
3.4 V
53
3.3 V
54
3.3 V
2.7 V
2.7 V
55
56
56
3.5 V
57
0 V
0 V
0 V
58
59
59
0 V
60
2.4 V
61
3.4 V
62
3.4 V
63
3.4 V
64
1.7 V
115
1.6 V
116
1.6 V
117
1 V
118
3.5 V
0 V
0 V
119
120
120
1 V
121
1.7 V
2.1 V
2.1 V
122
123
123
2.1 V
124
2.1 V
125
2.1 V
126
2.1 V
127
2.1 V
128
2.1 V
PIN NO. VOLTAGE
129
2.1 V
130
131
132
131
132
2.1 V
133
0 V
0 V
2.1 V
134
0 V
135
0 V
136
137
137
2.1 V
1.7 V
1.7 V
138
0 V
139
1.7 V
140
1.7 V
141
1.7 V
142
1.7 V
143
0 V
144
1.4 V
145
3.4 V
146
1.7 V
147
2.3 V
148
2.3 V
149
3.4 V
150
1.7 V
151
0 V
152
1.7 V
153
1.3 V
154
0 V
155
2.2 V
156
3.4 V
157
0.7 V
158
0 V
159
3.4 V
160
3.4 V
161
1.4 V
162
0.7 V
163
1.7 V
164
3.4 V
165
1.4 V
166
0 V
2.2 V
0 V
2.2 V
0 V
167
168
169
168
169
1.6 V
170
3.4 V
171
1.7 V
172
3.4 V
173
1.7 V
174
2.7 V
175
1.7 V
176
1.7 V
177
0 V
178
0 V
179
0 V
180
0 V
181
1.7 V
182
3.5 V
0 V
0 V
183
184
184
2.6 V
185
2.5 V
1.3 V
1.3 V
186
187
187
2.2 V
188
1.3 V
189
3.5 V
190
2.3 V
191
2.3 V
192
2.3 V
PIN NO. VOLTAGE
193
2.8 V
194
195
196
195
196
0 V
197
2.3 V
2.8 V
3.5 V
198
0 V
199
2.2 V
200
201
201
2.3 V
2.2 V
2.2 V
202
3.5 V
203
2.3 V
204
2.5 V
205
2.6 V
206
0 V
207
2 V
208
2 V
209
3.4 V
210
1.7 V
211
0 V
212
1.6 V
213
1.3 V
214
0 V
215
0 V
216
1.7 V
217
0 V
218
0 V
219
3.4 V
220
1.6 V
221
0 V
222
0 V
223
1.3 V
224
1.8 V
225
0 V
226
1 V
227
3.5 V
228
0 V
229
0 V
230
0 V
0 V
3.4 V
0 V
3.4 V
231
232
233
232
233
3.4 V
234
0 V
235
0 V
236
0 V
237
3.5 V
238
3.5 V
239
3.5 V
240
3.5 V
241
0 V
242
3.5 V
243
3.5 V
244
1.3 V
245
0 V
246
3.5 V
3.5 V
3.5 V
247
248
248
0 V
249
3.5 V
3.5 V
3.5 V
250
251
251
3.5 V
252
3.5 V
253
3.5 V
254
0 V
255
3.5 V
256
3.5 V
PIN NO. VOLTAGE
1
5 V
2
3
4
3
4
2.5 V
3.3 V
1.2 V
3.3 V
1.2 V
5
6
6
0 V
1.7 V
1.7 V
7
8
9
8
9
0 V
2.5 V
2.8 V
2.5 V
2.8 V
10
1.7 V
11
0 V
12
2.5 V
3.3 V
3.3 V
0 V
2.6 V
2.6 V
2.6 V
13
14
14
2.5 V
15
16
17
16
17
0 V
18
19
19
0 V
20
2.1 V
21
2.1 V
22
0 V
23
2.3 V
24
0.2 V
25
3.1 V
26
2.5 V
4.3 V
4.3 V
27
28
28
5 V
IC3201
PIN NO. VOLTAGE
1
1.2 V
2
3
4
3
4
1.2 V
0 V
0 V
0 V
0 V
5
6
6
1.4 V
1.7 V
1.7 V
7
8
9
8
9
0 V
0 V
0 V
0 V
0 V
10
7.6 V
11
0 V
12
0 V
1.3 V
1.3 V
0 V
0 V
0 V
0.7 V
13
14
14
1.3 V
15
16
17
16
17
0.7 V
18
19
19
7.6 V
20
1.3 V
21
1.3 V
22
7.6 V
23
1.3 V
24
7.6 V
25
1.2 V
26
1.2 V
0 V
0 V
27
28
28
1.2 V
IC3704
PIN NO. VOLTAGE
1
0.4 V
2
3
4
3
4
0.5 V
2.6 V
2.8 V
2.6 V
2.8 V
5
6
6
0.7 V
0.5 V
0.5 V
7
8
9
8
9
0.7 V
2.7 V
0 V
2.7 V
0 V
10
0 V
11
3.5 V
12
3.1 V
13
0 V
14
3.5 V
15
0 V
16
0 V
17
0 V
18
2.7 V
19
2.9 V
20
2.6 V
21
0.8 V
22
0.7 V
23
0.7 V
24
2.8 V
25
2.9 V
26
2.9 V
27
0 V
28
2.9 V
29
2.8 V
30
2.6 V
31
2.8 V
32
33
33
0.6 V
0.7 V
0.7 V
34
0.5 V
35
0.7 V
36
0.7 V
37
3.5 V
38
0.7 V
39
2.7 V
40
2.6 V
41
2.6 V
42
2.8 V
43
0.5 V
44
45
45
2.7 V
0.5 V
0.5 V
46
0 V
47
3.5 V
48
2.7 V
IC3501
PIN NO. VOLTAGE
1
3.5 V
2
3
4
3
4
2.6 V
3.5 V
2.3 V
3.5 V
2.3 V
5
6
6
2.3 V
0 V
0 V
7
8
9
8
9
2.3 V
2.8 V
3.5 V
2.8 V
3.5 V
10
2.2 V
11
2.2 V
12
0 V
13
2.5 V
14
2.4 V
15
3.5 V
16
2 V
17
3.4 V
18
3.4 V
19
3.3 V
20
3.1 V
21
0 V
22
1.6 V
23
1.6 V
24
0 V
25
0 V
26
0 V
27
2 V
28
3.5 V
29
0.6 V
30
2.6 V
31
0 V
32
33
33
2.3 V
2.3 V
2.3 V
34
3.5 V
35
2.3 V
36
2.8 V
37
0 V
38
2.2 V
39
2.2 V
40
3.5 V
41
2.5 V
42
3.5 V
IC3401
PIN NO. VOLTAGE
43
0 V
44
45
46
45
46
2.6 V
0 V
2.3 V
0 V
2.3 V
47
48
48
2.3 V
3.5 V
3.5 V
49
50
51
50
51
2.3 V
2.8 V
0 V
2.8 V
0 V
52
2.2 V
53
2.2 V
54
3.5 V
55
2.5 V
56
0 V
57
0 V
58
2 V
59
1.7 V
60
1.6 V
61
1.8 V
62
1.7 V
63
2.9 V
64
0 V
65
0 V
66
3.5 V
67
1.8 V
68
0 V
69
0 V
70
2 V
71
0 V
72
0 V
73
2.6 V
74
75
75
3.5 V
2.3 V
2.3 V
76
0 V
77
2.3 V
78
2.8 V
79
3.5 V
80
2.2 V
81
2.2 V
82
0 V
83
2.5 V
84
0 V
PIN NO. VOLTAGE
1
0 V
2.6 V
0.6 V
0.5 V
0.7 V
2.6 V
0.6 V
0.5 V
0.7 V
2
3
4
5
6
3
4
5
6
2.7 V
7
2.7 V
8
0.5 V
0.5 V
0.5 V
9
10
0 V
IC3503
PIN NO. VOLTAGE
1
0 V
0 V
0 V
0 V
3.5 V
0 V
0 V
0 V
3.5 V
2
3
4
5
6
3
4
5
6
3.5 V
7
0 V
8
3.5 V
IC3602
PIN NO. VOLTAGE
1
1.7 V
1.7 V
1.7 V
0 V
2.8 V
1.7 V
1.7 V
0 V
2.8 V
2
3
4
5
6
3
4
5
6
3.1 V
7
0 V
8
4.8 V
IC3702
PIN NO. VOLTAGE
1
3.5 V
0 V
0 V
2
3
3
1.7 V
4
1.7 V
3.5 V
3.5 V
5
6
6
0 V
1.7 V
1.7 V
7
8
8
1.7 V
9
1.7 V
10
1.7 V
11
0 V
12
3.5 V
13
1.7 V
14
0 V
15
1.7 V
16
3.5 V
IC3601
PIN NO. VOLTAGE
1
0 V
2.8 V
2.8 V
0.7 V
0.7 V
2.8 V
2.8 V
0.7 V
0.7 V
2
3
4
5
6
3
4
5
6
0.7 V
7
2.8 V
8
2.8 V
2 V
2 V
9
10
0 V
IC3504
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