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Portable DVD Player
DP271
Service manual
Circuit Voltage Chart - LG DP271, DP271B, LPA-837 Service Manual
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• CIRCUIT VOLTAGE CHART
MODE
MODE
STOP
PLAY
STOP
PIN NO.
PIN NO.
7
IC302(MX29LV160)
8
1
3.2
3.17
9
2
0
3.17
10
3
3.2
3.17
11
4
3.2
0.97
12
5
3.2
3.16
13
6
3.2
3.16
14
7
0
3.16
15
8
0
3.16
16
9
0
3.16
17
2.6
10
0
1.02
18
3.2
11
3.2
3.16
19
3.2
12
5.25
5.25
20
13
0
2.73
21
0.6
14
1.54
3.19
22
15
1.38
1.71
23
2.6
16
3.2
2.43
24
17
3.2
3.17
25
1.2
18
3.2
3.16
26
1.2
19
1.7
3.17
27
1.2
20
2.2
3.17
28
1.2
21
0
3.17
29
1.2
22
0
3.17
30
23
0
0
31
24
0
0
32
1.2
25
0
0
33
1.2
26
0
0
34
27
0
0
35
28
3.2
3.17
36
1.2
29
3.2
3.17
37
1.4
30
3.2
3.17
38
31
0
0
39
3.2
32
0
0
40
33
0
0
41
34
0
0
42
3.2
35
3.2
0
43
36
0
0
44
0.6
37
3.2
3.23
45
1.8
38
3.26
0
46
39
3.2
3.17
47
40
0
0
48
41
3.2
3.17
49
3.2
42
0
0
50
1.8
43
0
3.17
51
3.2
44
0
0
52
45
0
0
53
46
0
0
54
3.2
47
0
0
55
1.7
48
3.2
3.17
IC303(24C16)
56
3.2
57
3.2
1
0
0
58
3.2
2
0
0
59
3.2
3
0
0
60
3.2
4
0
0
61
3.2
5
3.2
3.2
62
3.2
6
0
0
63
3.2
7
3.2
3.2
64
3.2
8
3.2
3.2
U201(MT1389P)
65
3.2
66
3.2
1
0
0
67
3.2
2
0
0
68
3.2
3
0
0
69
3.2
4
0
0
70
3.2
5
0
0
71
3.2
6
1.6
1.6
MODE
PLAY
STOP
PLAY
PIN NO.
2
2
72
3.2
3.2
2
2
73
3.2
3.2
2
2
74
3.2
3.2
2
2
75
3.2
3.2
0
0
76
0
0
0
0
77
3.2
3.2
2
2
78
0
0
2
2
79
3.2
3.2
0
0
80
3.2
3.2
0
0
81
0
0
2.5
82
3.2
3.2
3.1
83
3.2
3.2
3.1
84
3.2
3.2
0
1.95
85
3.2
3.2
2.05
86
3.2
3.2
0
0
87
3.2
3.2
2.51
88
3.2
3.2
2
2
89
3.2
3.2
1.3
90
0
0
1.4
91
3.2
3.2
1.3
92
3.2
3.2
1.2
93
1.7
1.7
1.2
94
0
0
2
1.3
95
0
0
2
1.3
96
3.2
3.2
2
97
3.2
3.2
1.2
98
4.2
4.3
0
0
99
4.2
4.3
0
0
100
3.2
3
1.3
101
3.2
3.2
1.3
102
3.2
3.2
0
0
103
0
0
3.2
104
0
0
0
0
105
3.2
3.1
0
0
106
3.2
3.2
3.2
107
0
0
0
0
108
3.2
3.2
0.6
109
0
0
1.7
110
0
0
0
0
111
3.2
3.2
0
0
112
0
0
0
0
113
3.2
3.2
3.2
114
3.2
3.2
1.8
115
3.2
3.2
0
116
3.2
3.2
0
0
117
3.2
3.2
0
0
118
3.2
3.2
2.7
119
3.2
3.2
1.7
120
3.2
3.2
3.2
121
3.2
3.2
3.2
122
3.2
3.2
3.2
123
3.2
3.2
3.2
124
3.2
3.2
3.2
125
3.2
3.2
3.2
126
3.2
3.2
3.2
127
3.2
3.2
3.2
128
3.2
3.2
3.2
129
3.2
3.2
3.2
130
0
0
3.2
131
3.2
3.2
3.2
132
3.2
3.2
3.2
133
3.2
3.2
3.2
134
3.2
3.2
3.2
135
3.2
3.2
3.2
136
3.2
3.2
MODE
MODE
STOP
PLAY
STOP
PIN NO.
PIN NO.
137
3.2
3.2
202
0
138
3.2
3.2
203
3.2
139
3.2
3.2
204
0
140
3.2
3.2
205
1.8
141
3.2
3.2
206
0
142
1.8
1.8
207
3.2
143
3.2
3.2
208
3.2
144
3.2
3.2
209
0
145
3.2
3.2
210
3.2
146
3.2
3.2
211
0
147
3.2
3.2
212
3.2
148
0
0
213
0
149
3.2
3.2
214
3.2
150
3.2
3.2
215
0
151
3.2
3.2
216
0
152
3.2
3.2
217
0
153
3.2
3.2
218
0
154
3.2
3.2
219
0
155
3.2
3.2
220
0
156
0
0
221
1.8
157
0
0
222
3.2
158
0
0
223
1.4
159
0
0
224
0
160
1.7
1.7
225
0
161
0
0
226
0
162
0
0
227
1.6
163
0
0
228
1
164
0
0
229
1.6
165
0
0
230
3.2
166
0
0
231
3.2
167
0
0
232
0
168
0
0
233
1.8
169
0
0
234
0.6
170
3.2
3.2
235
0.6
171
0
0
236
0
172
0
0
237
0
173
3.2
3.2
238
0
174
1.8
1.7
239
3.2
175
3.2
3.2
240
1.3
176
3.2
3.2
241
1.3
177
3.2
3.2
242
1.3
178
0
0
243
1.3
179
0
0
244
3.2
180
3.2
3.2
245
0
181
0
0
246
3.2
182
0
0
247
0.6
183
2.6
2.6
248
1.2
184
1.4
1.4
249
3.2
185
1.4
1.4
250
1.2
186
0
0
251
0
187
1.4
1.4
252
1.4
188
3.2
3.2
253
1.4
189
0
0
254
1
190
3.2
3.2
255
0.8
191
1.2
1.2
256
3.2
U202(CM1117SCM233)
192
0
0
193
1.2
1.2
1
0.6
194
1.2
1.2
2
1.8
195
3.2
3.2
3
3.2
196
2.4
2.4
4
1.8
197
0
0
U301(HY57V641620HGT)
198
0
0
1
3.25
199
0
0
2
2.85
200
3.2
3.2
3
3.25
201
0
0
4
2.87
3-51
3-52
MODE
PLAY
STOP
PLAY
PIN NO.
PIN NO.
0
5
2.85
2.5
3.2
6
0
0
0
7
2.81
2.1
1.8
8
2.9
2.04
0
9
3.25
3.22
3.2
10
2.85
2.1
3.2
11
2.87
2.91
0
12
1.9
0
3.2
13
2.8
2.1
0
14
3.25
3.22
3.2
15
0
0
0
16
3.18
3.1
3.2
17
3.07
2.58
0
18
3.14
0.61
0
19
2.95
2.97
0
20
2.9
2.96
0
21
2.6
0.32
0
22
2.81
2.83
0
23
0.05
0.06
1.8
24
0.16
0.18
3.2
25
0.16
0.18
1.4
26
0.16
0.17
0
27
3.26
3.24
0
28
0
0.59
0
29
0.16
0.17
1.6
30
0.15
0.53
1
31
0.16
0.53
1.6
32
0.12
0.5
3.2
33
0.05
0.16
3.2
34
0.05
0.17
0
35
0.04
0.5
1.8
36
2.85
0.08
0.6
37
3.26
3.236
0.6
38
1.79
1.78
0
39
0
0
0
40
2.7
0.1
0
41
2.7
0
3.2
42
2.9
2
1.3
43
3.26
3.23
1.3
44
2.92
1.95
1.3
45
2.92
2.01
1.3
46
0
0
3.2
47
2.92
2.03
0
48
2.94
2.17
3.2
49
3.26
3.23
1.2
50
2.91
2
1.2
51
2.94
2
1.2
52
0
0
0
53
2.9
1.85
0
54
0
0
1.4
U401(AM5898N)
0
1
2.2
2.3
1
2
1.2
1.5
0.8
3
1
1.1
3.2
4
5
5
5
9.2
9.2
0.6
6
9.2
9.2
1.8
7
9.6
9.6
3.2
8
2.1
2.5
1.8
9
2.1
2.5
10
4.7
4.8
3.23
11
1
1.2
2.86
12
1
1.4
3.22
13
0
0
2.87
14
2.1
3.4
MODE
STOP
PLAY
15
2.1
1.4
16
0
0
17
2.1
2.2
18
2.1
2.1
19
0
0
20
2.1
2
21
2.1
2
22
1
1.1
23
1
1.1
24
4.6
4.6
25
0
0
26
0
0
27
0
0
28
9.6
9.6
29
4.5
4.5
30
1
1
31
1.1
1.2
32
2.8
2.8
33
0
3
34
1.1
1.2
35
0
0
36
0
0
U501(FSAV330)
1
0
0
2
0
0
3
0
0
4
0
0
5
0
0
6
0
0
7
0
0
8
0
0
9
0
0
10
0
0
11
0
0
12
0.5
0.5
13
0
0
14
0.5
0.5
15
0
0
16
0
0
U502(PT2303)
1
0
0
2
0
0
3
2.4
2.4
4
5
5
5
2.4
2.4
6
2.4
2.4
7
0
0
8
2.4
2.4
9
2.4
2.4
10
2.4
2.4
11
2.4
2.4
12
2.4
2.4
13
5
5
14
2.4
2.4
15
0
0
16
0
0
U504(NJM4580M)
1
0
0
2
0
0
3
0
0
4
-5
-5
5
0
0
6
0
0
7
0
0
8
5
5
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Table of Contents
Troubleshooting
LCD ELECTRICAL TROUBLESHOOTING GUIDE
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