Front Board - Philips DVP3000K Service Manual

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N o di spl ay on VFD , and but t ons do not w or k
N o di spl ay on VFD , and
but t ons do not wor k
C heck w het her t her e i s
cor r ect cont act bet w een
C N 301 and C N 6
check- 24V+12V, VC C ( +5v)
vol t age on t he pow er and
f r ont boar d
C heck t her e
VSD A0 and VSC K si gnal s
on C N 303 on t he f r ont boar d.
1. C heck w het her bad sol der exi st s on
U 301 and pi ns of VFD ,
2. C heck w het her t he ci r cui t connect ed t o
K302, K303, K304 and K301 i s br oken,
3. C heck w het her R 300, R 301 and R 302
ar e open- ci r cui t .
R epl ace U 301 or VFD
Yes
Yes
Yes
ar e VSTB,
Yes
Yes
4- 6
N o
C or r ect connect i on
Fi x pow er suppl y boar d t op
N o
a pow er suppl y f or shoul d
el ect r i c ci r cui t
N o C heck t he U 3' s pi n 62, 63, 64 ar r i ve
t he C N 6 connect condi t i on
CN 6 ( PI N 4 V. SCK ) CN 6 ( PI N 7 V SD A 0)
N o
C or r ect connect i on
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