![background image](http://html1.mh-extra.com/html/viewsonic/e70f-17-crt-display/e70f-17-crt-display_service-manual_1020255044.webp)
4. Vertical deflection is defective.
Vertical is defective
The picture is one
horizontal line
Is the waveform pin2 of
IC401 normal?
Check the dflection Yoke
Is the waveform at pin6
of IC501 normal?
Check V-sync of IC301
pin33 or signal cable
Is the IC501 pin2=14V
pin5=-12V?
Is the waveform of IC401
pin13, pin23 normal?
Check power supply 14V,
-12V
IC401 is defective
5Vp-p
45Vp-p
Yes
Yes
No
No
No
Yes
No
41
ViewSonic Corporation
Co
nfidential - Do Not Copy
70f+SB-3
E
Содержание E70F - 17" CRT Display
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Страница 55: ...8 Exploded Diagram And Spare Parts List 52 ViewSonic Corporation Confidential Do Not Copy 70f SB 3 E...
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Страница 63: ...9 Block Diagram Model No E70f SB 3 60 ViewSonic Corporation Confidential Do Not Copy 70f SB 3 E...
Страница 64: ...Model No E70f SB 3 10 Schematic Diagrams 61 ViewSonic Corporation Confidential Do Not Copy 70f SB 3 E...
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Страница 77: ...11 PCB Layout Diagrams 74 ViewSonic Corporation Confidential Do Not Copy E70f SB 3...