![background image](http://html.mh-extra.com/html/viewsonic/vlcds26064-2w/vlcds26064-2w_service-manual_1021326040.webp)
6.1 No
power.
Check that CN251 pin1, are approximately 24V
Check that C281 are 24V
Failure point
1. Adaptor failure.
2. Disconnected between CN251 and Adaptor.
Check that C262 positive is at 5V.
Failure point
FB251, FB251 failure
Failure point
D251, IC251, L251, Q255 failure
Check:
1. IC255 is O/P 3.3V.
2. IC253 is O/P 1.8V.
3. IC256 is O/P 2.5V.
4. IC252 is O/P 3.3V.
Yes
Yes
Yes
No
No
No
Failure point
IC255, IC253, IC252, IC256
No
6. Troubleshooting Flow Chart
37
ViewSonic
Corporation
Co
nfidential
-
Do
Not
Copy
VP201b/s-1
Summary of Contents for VLCDS26064-2W
Page 26: ...5 3 6 Click Gprobe 4 23 ViewSonic Corporation Confidential Do Not Copy VP201b s 1 ...
Page 27: ...24 ViewSonic Corporation Confidential Do Not Copy VP201b s 1 ...
Page 31: ...Connect to D Sub Signal cable 28 ViewSonic Corporation Confidential Do Not Copy VP201b s 1 ...
Page 34: ...31 ViewSonic Corporation Confidential Do Not Copy VP201b s 1 ...
Page 35: ...5 3 9 Open VP2000BATCH 32 ViewSonic Corporation Confidential Do Not Copy VP201b s 1 ...
Page 37: ...5 3 11 Press Enter key 34 ViewSonic Corporation Confidential Do Not Copy VP201b s 1 ...
Page 63: ...60 ViewSonic Corporation Confidential Do Not Copy VP201b s 1 9 Block Diagram ...
Page 65: ...Main Board 62 ViewSonic Corporation Confidential Do Not Copy VP201b s 1 ...
Page 66: ...Main Board 63 ViewSonic Corporation Confidential Do Not Copy VP201b s 1 ...
Page 67: ...Main Key Board 64 ViewSonic Corporation Confidential Do Not Copy VP201b s 1 ...
Page 68: ...DVI Board 65 ViewSonic Corporation Confidential Do Not Copy VP201b s 1 ...
Page 69: ...Power Board 66 ViewSonic Corporation Confidential Do Not Copy VP201b s 1 ...
Page 70: ...Inverter Board 67 ViewSonic Corporation Confidential Do Not Copy VP201b s 1 ...
Page 72: ...Main Board Bottom 69 ViewSonic Corporation Confidential Do Not Copy VP201b s 1 ...
Page 73: ...Power Board 70 ViewSonic Corporation Confidential Do Not Copy VP201b s 1 ...
Page 74: ...Power Board Bottom 71 ViewSonic Corporation Confidential Do Not Copy VP201b s 1 ...
Page 75: ...72 ViewSonic Corporation Confidential Do Not Copy VP201b s 1 Inverter Board ...
Page 76: ...73 ViewSonic Corporation Confidential Do Not Copy VP201b s 1 Inverter Board Bottom ...