ViewSonic E70FSB-2 Service Manual - Page 25
Power Supply Trouble Shooting Chart - drivers
 |
UPC - 766907870558
View all ViewSonic E70FSB-2 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 25 highlights
6-9 POWER SUPPLY TROUBLE SHOOTING CHART BEFORE CHECK SW.REG. PLEASE REFER TO THE POWER SUPPLY BLOCK DIAGRAM POWER SUPPLY OUTPUT: (A) VARIABLE OUTPUT : 58. V - 14V (DEPENDING EPENDING UPON H.SYNC FREQUENCY) (B) CONSTANT OUTPUT : 6.3V, 12V, -12V, 80V BEAD SET CHECK AC LINE VOLT 120V OR 220V NG OK CHECKF901, SW901 CHECK LINE RECTIFIED & SMOOTHED VOLT NG OK CHECK START C.K.T R923 R924, D911, D917 R904, Q906 CHECK BRIDGE RECTIFIED CIRCUIT ABNORMAL VARIABLE OUTPUT MAKE SURE THAT THE VARIABLE Output is not shorted Check IC401 pin 3,4,5,6,B+driver YES CHECK THE 53V NG OK CHECK Q911 CHECK D919 OK CHECK T901 O/P NG OK CHECK IC901 NG OK CHECK Q901 NG OK Q911 FAILURE Check 78V, 59.5V, 14V NG CHECK Q901 6.3V, -12VCIRCUIT OUTPUT IC401,10(ABOUT 11.5V) OK IC901 FAILURE ViewSonic Corporation 22 Confidential - Do Not Copy E70f-5_E70fB-5_E70fSB-5
-
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
 |
 |
