Read Sharp LC-20SD4E (serv.man5) Service Manual online
A
B
C
D
E
F
G
H
A
B
C
D
E
F
G
H
2
1
3
4
5
6
7
8
2
1
3
4
5
6
7
8
L803 2.2uH
L808
22uH
L802
2.2uH
L801
2.2uH
NR804
4D03WGJ0470T5E
NR802
4D03WGJ0470T5E
NR801
4D03WGJ0000T5E
NR806
4D03WGJ0470T5E
B803
FCM1608CF-600T06
B805
BLM18BD102SN1
B804
BLM18PG181SN1D
B801
BLM18PG181SN1D
IC801
R8J66606A72FP
SCALER
101 102 103 104 105 106 107 108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
1
51
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
1
10
100
11
12
13
14
15
16
17
18
19
12
13
14
15
16
17
18
19
2
20
21
22
23
24
25
26
27
28
29
21
22
23
24
25
26
27
28
29
3
30
31
32
33
34
35
36
37
38
39
31
32
33
34
35
36
37
38
39
4
40
41
42
43
44
45
46
47
48
49
41
42
43
44
45
46
47
48
49
5
50
51
52
53
54
52
53
54
55 56 57 58 59
6
60 61 62 63 64 65 66 67 68 69
7
70 71 72 73 74 75 76 77 78 79
8
80 81 82 83 84 85 86 87 88 89
9
90 91 92 93 94 95 96 97 98 99
Q802
2SC3052
SW
Q801
2SC3052
SW
Q804
2SA1530A
2SA1530A
BUFFER
Q803
2SA1530A
2SA1530A
BUFFER
CP802
00_6232_030_006_800+
00_6232_030_006_800+
1
10
11
12
13
14
15
16
17
18
19
2
20
21
22
23
24
25
26
27
28
29
3
30
4
5
6
7
8
9
CP801
00_6232_017_006_800+
1
10
11
12
13
14
15
16
17
2
3
4
5
6
7
8
9
CD802
2H0U1302
2H0U1302
CD801
2H0H1002
2H0H1002
W816
W815
W819
W806
W823
W818
W827
W835
W871
W872
W821
C857
0.1
B
C894
0.001
B
C895
0.01
B
C817 0.1 B
C838 0.1 B
C827 0.1 B
C887
0.1
B
C863
0.1 B
C896 0.1 B
C899
0.1
B
C828
0.1
B
C871
0.1
B
C881
0.1
B
C877
0.1
B
C884
0.1
B
C886
0.1
B
C893
0.1
B
C839
0.1
B
C862 0.1 B
C882
0.1
B
C824
0.1
B
C840
0.1 B
C841
0.1 B
C842
0.1 B
C825 0.1 B
C843
0.1 B
C844
0.1 B
C845
0.1 B
C816
0.1
B
C814
0.1
B
C819
0.1
B
C848
0.1 B
C849
0.1 B
C847
0.1 B
C820
0.1
B
C869 0.1 B
C867 0.1 B
C859
0.1
B
C865
0.1
B
C826
0.1 B
C832
0.1 B
C833
0.1 B
C834
0.1 B
C846
0.1 B
C822
0.1
B
C818
0.1 B
C812
330P CH
C868
0.1
B
C864
0.1
B
C874
0.1
B
C810
27PCH
C808
82P
CH
C806
100P
CH
C807
27P CH
C853 0.1 B
C829 0.1 B
C809
100P
CH
C813
0.1
B
C900
10
B
C803
68P
CH
C805
220P
CH
C804
27P CH
C811
82P
CH
C897
0.1
B
C898
0.1
B
C860
0.1 B
C883
0.1
B
C888
0.1
B
C885
0.1
B
C823
330P CH
C851 0.1 B
C835
0.1 B
C866
0.1
B
C872
0.1
B
C876
0.1
B
C858
10
B
C873
0.1
B
C875
5P
CH
C879
5P
CH
C891
0.1
B
OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE
NOTE: THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME
R870 47
R869 47
R886
10K
R865
1K
R864
47
R866 10K
R874
47
R838
10K
R840
10K
R844
10K
R848
10K
R855
10K
R857
10K
R825
10K
R826
10K
R828
10K
R839
10K
R842
10K
R846
10K
R850
10K
R837
10K
R867
10K
R815
10K
R816
10K
R810
560
R806
10K
R804
560
R811
10K
R822
10K
R830
10K
R832
10K
R847
10K
R849
10K
R845
10K
R843
10K
R841
10K
R831
10K
R829
10K
R827
10K
R824
10K
R823
10K
R821
10K
R820
10K
R819
10K
R818
10K
R851
10K
R817
10K
R807
10K
R808
10K
R809
10K
R814
10K
R813
10K
R812
10K
R858
10K
R860
47
R877
47
R887
10K
R888 10K
R883 10K
R889 10K
R853
10K
R894
100
R892
100
R893
100
R895
100
R903
1K
R901
1K
R905
100
R884 10K
R885
10K
R873
47
R878
47
R836
10K
R835
10K
R834
10K
R833
10K
R862
10K
R852
10K
R863
47
R900
10
R904
100
R902
10
R861
47
R854
1M
R859
150
C870
220
6.3V
V-S
C831
220
6.3V
V-S
C821
220
6.3V
V-S
C861
220
6.3V
V-S
C815
220
6.3V
V-S
C830
220
6.3V
V-S
D802
UDZS5.6B
X801
54MHz
100YT05401
WAS RECEIVED IN GOOD CONDITION AND PICTURE IS NORMAL.
WITH THE DIGITAL TESTER WHEN THE COLOR BROADCAST
NOTE:THE DC VOLTAGE AT EACH PART WAS MEASURED
GND
P.CON+3.3V
AFT
AGC
SCART1_SW
SDA1
PANEL_ON-H
SCL1
DVB_FAN_ON-H
SCART1_SW
DVB_POWER_ON-H
SCART1_Y
SCALER_RESET
SCALER_RESET
DVB_SW-H
POWER_FAIL
POWER_ON-H
POWER_ON-H
POWER_FAIL
DVB_POWER_ON-H
GND
PANEL_ON-H
SCART1_Y
ERPG_ON_H
EXT_MUTE-H
COMPONENT_PR
STEREO_RESET
AUDIO_MUTE
COMPONENT_Y
4SI_CHIP_SE
4SI_SDA_OUT
COMPONENT_PB
4SI_SDA_IN
4SI_SCL
EXT_MUTE-H
REMOCON_IN
AUDIO_MUTE
STANDBY_LED
AGC
DVB_FAN_ON-H
AFT
DVB_SW-H
REMOCON_IN
DTUNER_POWER
SW_VIDEO_Y
STANDBY_LED
DTUNER_RESET_L
DTUNER_RX
DTUNER_RX
SW_VIDEO_C
DTUNER_TX
SW_CVBS
LCDON
OFL1
OFL2
LMP_ERR
SCALER_SW
DVB_ASPECT_IN
OFL1
OFL2
LMP_ERR
SCALER_SW
DVB_ASPECT_IN
SW_CVBS
DTUNER_POWER
STANDBY-H
DVS
DR9
COMPONENT_PR
DR8
DR7
DR6
DR7
DR6
DR4
DR5
DR5
DR6
DR6
DR4
DR7
DR8
DR9
DR8
DR9
SW_VIDEO_C
DB9
DB8
DB7
DB8
DB7
COMPONENT_PB
DG4
DB6
DG5
DG6
DG6
DB5
DG7
DB4
DG8
DG9
DG9
P.CON+5V
SCL1
DB4
DB5
DB5
SDA1
DB6
SW_VIDEO_Y
DG9
STEREO_RESET
DB7
DG8
DB8
DG7
COMPONENT_Y
DB9
DG6
DTUNER_RESET_L
DTUNER_RX
DCLK1
DG5
DVS
DG4
DHS
DTUNER_TX
DEN
LCDON
OFL1
OFL2
P.CON+3.3V
LMP_ERR
P.CON+1.8V
ERPG_ON_H
P.CON+3.3V
DVB_ASPECT_IN
GND
P.CON+5V
P.CON+5V
STANDBY-H
SCALER_SW
SCALER_RESET
SCART1_Y
SW_VIDEO_Y
SW_CVBS
P.CON+1.8V
DCLK1
GND
DHS
DVS
DEN
4SI_SCL
4SI_SDA_OUT
4SI_SDA_IN
4SI_CHIP_SE
4SI_SDA_IN
4SI_CHIP_SE
H-20
H-19
PCBDS0
CEF197
CEF197
DTUNER Tx
DTUNER_Rx
FROM/TO SYNC SEPA
FROM/TO AV SWITCH
(CP4205)
FROM/TO 21PIN
(CP4204)
(SCALER PCB)
SCALER SCHEMATIC DIAGRAM
FROM/TO REGULATOR
FROM/TO MICON
31
ANALOG+3.3V
NC
NC
NC
NC
DVDD33
PXD24
PDX25
PDX25
PDX27
PDX26
VDIN
HDIN/FBIN
DVDD33
DGND
VRPD
VROD
VRMD
VIND
HDIN/FBIN
DVDD33
DGND
VRPD
VROD
VRMD
VIND
AVDDD1
AVSSD1
AVSSD1
AVSSD2
AVDDD2
VRPC
VROC
VRMC
VINC
AVDDC2
AVSSC2
AVDCC1
AVSSC1
DVDD
DVSS
VRPB
VROB
VRMB
VIN1B
AVDDB2
VIN2B
AVSSB2
AVDDB1
AVSSB1
VRPA
VROA
VRMA
VIN1A
AVDDA2
VIN2A
AVSSA2
VIN3A
AVDDA1
AVSSA1
SVSS
DVDD33
DGND
RESET
QOECTL
HDIN2
VDIN2
DVDD33
VROC
VRMC
VINC
AVDDC2
AVSSC2
AVDCC1
AVSSC1
DVDD
DVSS
VRPB
VROB
VRMB
VIN1B
AVDDB2
VIN2B
AVSSB2
AVDDB1
AVSSB1
VRPA
VROA
VRMA
VIN1A
AVDDA2
VIN2A
AVSSA2
VIN3A
AVDDA1
AVSSA1
SVSS
DVDD33
DGND
RESET
QOECTL
HDIN2
VDIN2
DVDD33
MPWEL
MPOE
MPCE
MPAH/PCXLKI
DVDDSD
MDQ15/C656IN7
MDQ14/C656IN6
MDQ13/C656IN5
MDQ12/C656IN4
MDQ11/C656IN3
MDQ10/C656IN2
MDQ9/C656IN1
DVDD33
DGND
DVDD18
MDQ8/C656IN0
MDQ7/C656OUT7
MDQ6/C656OUT6
MDQ5/C656OUT5
MDQ4/C656OUT4
MDQ3/C656OUT3
MDQ2/C656OUT2
MDQ1/C656OUT1
DVDDSD
DGND
MPSEL0
XIN
XOUT
MPSEL1
MDQ0_C656OUT0
QE/PXCLK0
QH
QV
QDRVHA/QDE
DVDD33
DGND
DVDD18
QDRVHB
QDRVHC
QDRVHD
QDRVHE
DVDD33
DGND
DVDDSD
QDRVHF
QDRVVA
QDRVVB
DVD33
TEST0
QCLKL
QGL1
LPF1
TEST1
QGL2
QGL3
QGL4
DVDD33
DGND
QGL5
QGL6
QGL7
QBL1
QBL0
QBL0
DVDD18
DGND
DVDD33
QBL2
QBL3
QBL4
QBL5
QBL5
QBL6
QBL7
QRL0
QRL1
QRL2
DVDD18
DGND
DVDD33
QRL3
QRL4
QRL5
QRL6
QRL7
QCLKR
QGR0
QGR1
DVDD18
DGND
DVDD33
QGR2
QGR3
QGR4
QGR5
QGR6
QGR7
DVDD33
DGND
QBR0
QBR1
QBR2
QBR3
DVDD33
QBR5
QBR6
QBR7
QRR0
DVDDSD
DGND
DVDD33
QRR1
QRR2
QRR3
DVDD18
DGND
DVDD33
QRR4
QRR5
QRR6
QRR7
TSTCLK
QBLCA
QBLCB
QBLCC
QBLCD
DGND
DVDDSD
PXCLK
PXD00
PXD01
PXD02
PXD03
PXD04
PXD05
PXD06
DVDD18
DGND
DVDD33
PXD07
PXD10
PXD11
PXD12
PXD13
DVDDSD
PXD14
PXD15
PXD16
PXD17
PXD20
PXD21
PXD22
56
55
57
106
107
108
214
215
216
163
164
165
PXD23
DVDD18
DGND
DGND
DVDD18
QBR4
QGL0
DVDD18
DGND
DVDD18
MPWEL
DGND
1.58
3.4
0
0
0.7
3.4
3.4
3.4
3.4
3.4
3.4
3.4
3.4
3.4
3.4
3.4
3.4
3.4
3.4
3.4
0
1.6
1.2
0.7
0.9
3.4
1.2
0.7
0.9
3.4
0
3.4
0
1.6
1.1
0.7
1.3
3.4
1.1
0.7
1.3
3.4
0
3.4
0
3.4
0
1.6
1.1
0.7
0.5
3.4
2.0
1.1
0.7
0.5
3.4
2.0
0
3.4
0
1.6
1.1
0.7
0.5
1.1
0.7
0.5
3.4
NC
1.3
0
1.3
3.4
3.4
0
0
0
3.4
0
3.7
3.7
3.3
3.3
3.4
3.7
3.3
3.3
3.4
1.8
0
3.2
3.2
3.5
3.4
3.7
3.4
0
0
0
0
0
3.4
0
1.8
0
0
0
0
0
0
0
0
0
0
3.4
0
0
1.8
2.0
0
0
3.4
3.3
3.3
3.3
3.4
NC
NC NC NC
NC
0
1.8
0
0
0
0
3.4
0
3.4
0
0
0
3.4
3.4
1.8
0
3.4
0
1.5
0
3.4
3.4
3.4
3.4
3.4
0
3.4
3.4
3.4
3.4
3.4
1.8
0
3.4
3.4
3.4
3.4
3.4
3.4
3.4
3.4
3.4
3.4
1.8
0
3.4
3.4
3.4
3.4
3.4
3.4
0
0
3.4
3.4
3.4
1.8
0
0
0
0
0
0
0
0
0
0
0
0
0
0
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
0
1.8
0
0
0
0
0
3.4
0
3.4
0
0
0
1.8
0
3.4
0
0
0
0
3.3
0
0
0
0
0
3.4
3.4
3.4
3.4
3.4
3.4
3.4
3.4
1.8
0
3.4
3.4
3.4
3.4
3.4
3.4
3.4
3.4
3.4
3.4
3.4
3.4
3.4
3.4
3.4
3.4
0
1.8
FROM/TO RSDS
DVB_FAN_ON-H
POWER_ON-H
POWER_FAIL
GND
SCART1_Y
GND
SW_R/Cr(V)
GND
SW_G/Y
GND
SW_B/Cb(U)
GND
EXT_MUTE-H
AUDIO_MUTE
AGC
AFT
REMOCON IN
STANDBY LED
GND
GND
SWITCH_CVBS
GND
DTUNER_POWER
PANEL_ON-H
SCART1_SW
GND
DVB_SW-H
DVB_POWER_ON-H
DTUNER_RESET_L
SCL1
SDA1
STEREO_RESET
GND
GND
OFL1
OFL2
LMP_ERR
GND
SCALER_SW
LCDON
STANDBY-H
DVB_ASPECT_IN
ERPG_ON_H
NC NC NC
3.4
DIGITAL+3.3V
SWITCH_VIDEO_C
SWITCH_VIDEO_Y
0
5.0
0.1
0.1
0
5.0
30
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