Epson DLQ-3000+ Service Manual page 146

Epson dlq-3000+ 24-pin dot matrix printer
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Flowchart 5 : The control panel does not operate properly.
S T A R T
T u r n t h e p r i n t e r o n w i t h
n o p a p e r l o a d e d .
D o e s
t h e L C D o r
L E D s i n d i c a t e t h e
p a p e r o u t
c o n d i t i o n ?
Y E S
T r y a l l p a n e l f u n c t i o n s o n e
b y o n e a n d c h e c k f o r t h e
c o r r e c t p a n e l i n d i c a t i o n s .
D o a l l
b u t t o n s , L E D s
a n d L C D o p e r a t e
n o r m a l l y ?
Y E S
E N D
Rev. A
N O
C h e c k t h e o u t p u t
v o l t a g e o f t h e
P S B / P S E b o a r d .
( S e e T a b l e 5 - 4 . )
N O
R e p l a c e t h e
c o n t r o l p a n e l .
Figure 5-6. Flowchart 5
I s t h e
v o l t a g e l e v e l
n o r m a l ?
Y E S
R e p l a c e t h e
c o n t r o l p a n e l .
Y E S
I s t h e f a u l t
c o r r e c t e d ?
N O
R e p l a c e m a i n
c o n t r o l b o a r d .
Y E S
I s t h e f a u l t
c o r r e c t e d ?
N O
R e p l a c e t h e p r i n t e r
m e c h a n i s m .
Troubleshooting
N O
R e p l a c e t h e P S B / P S E
b o a r d .
5-7

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