Sharp GX30 Service Manual - Page 66
Back Light does not turn on., Are C790, C791, C702, C713, R718, and D702 in good
 |
View all Sharp GX30 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 66 highlights
GX30 10. Back Light does not turn on. CONFIDENTIAL Is VBAT voltage applied to C701? NO YES Which back light does not turn on, Main or External? External display only. Main Display only or both. FS701 is mounted improperly, or the fuse is brown. NO Is fuse (FS701) in good appearance, mounted properly, and is there conduction? YES C701, C703, and L701 are defective. C Is back light setting for External Display set to On? YES Is CN705 in good appearance and mounted properly? YES Is the contact point of back light FPC clean? Is back light FPC properly inserted to CN705? YES Is 13 - 24 V applied between TP710 and TP711? NO Are C790, C791, C702, C707, C713, R718, and D702 in good appearance and mounted properly? YES IC707, and R707 are defective. Go to the setting as follows and set it to On: NO Settings → Phone settings Main display → Back light NO Does it turn on? YES Not defective. NO CN705 is defective. Back light FPC or CN705 is defective. NO NO Clean back light FPC and insert it again. Does it turn on? YES Not defective. YES Back light FPC is defective. NO C790, C791, C702, C707, C713, R718, and D702 are defec- tive. C Is back light setting for Sub Display set to On? YES Is 7 V applied between LED703 anode (A) terminal and LED704 cathode (K) terminal? YES LED703 and LED704 are defective. Go to the setting as follows and set it to On: NO Settings → Phone settings External display → Back light NO Does it turn on? YES Not defective. NO IC707 is defective or mounted improperly. 2 - 58
-
1 -
2
-
3
-
4
-
5
-
6
-
7
-
8
-
9
-
10
-
11
-
12
-
13
-
14
-
15
-
16
-
17
-
18
-
19
-
20
-
21
-
22
-
23
-
24
-
25
-
26
-
27
-
28
-
29
-
30
-
31
-
32
-
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 -
65 -
66 -
67 -
68 -
69 -
70 -
71 -
72
-
73
-
74
-
75
-
76
-
77
-
78
-
79
-
80
-
81
-
82
-
83
-
84
-
85
-
86
-
87
-
88
-
89
-
90
-
91
-
92
-
93
-
94
-
95
-
96
-
97
-
98
-
99
-
100
-
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
-
151
-
152
-
153
-
154
-
155
-
156
-
157
-
158
-
159
-
160
-
161
-
162
-
163
-
164
-
165
-
166
 |
 |
