Service manual

ManualsBrandsViewSonic ManualsComputer equipmentE90B-4

6.2 No Power & Power LED Off

No

p

ower

Check primary

rectifier volta

g

e

Check IC802,

C804, T801

Check circuit

if short

Check F801,

P801,,RT801, D801

Check pin5 of

IC802 voltage

about 2.3V

Check R833, R835,

R805, R834, R807

Check pin4of IC802

volta

g

e about300 V

Check R808,R806

Check pin7 of IC802

volta

g

e is 16V

Check FB801,D803

Is there instantaneously

pulse wave on pin8

Check IC802

END

ViewSonic Corporation

VX2433wm-1

VX2433wm-CN

CONFIDENTIAL – DO NOT COP

Y

76