Akai PDP4249G Service Manual page 21

TROUBLE SHOOTING FLOW CHART
In the even of problems with the display, check the following explanations before
contacting your dealer for servicing.
Problem
Power does not turn ON.
Remote control does not function properly.
The display makes a snapping sound.
There are spots on the screen.
Degraded colour/tints.
Improper screen position/size
If "Out of range" appears, the display is
receiving a signal whose picture or signal
cannot be reproduced by the display.
The screen turns to black and white.
Action
C h e c k w h e t h e r t h e p o w e r p l u g i s s e c u r e l y i n s e r t e d
i n t o t h e r e c e p t a c l e .
C h e c k f o r i n c o r r e c t b a t t e r y o r i e n t a t i o n .
C h e c k f o r d e a d b a t t e r i e s .
C h e c k f o r d i s t a n c e f r o m t h e d i s p l a y .
C h e c k w h e t h e r y o u a r e p o i n t i n g t h e r e m o t e c o n t r o l
t r a n s m i t t e r p r o p e r l y a t t h e d i s p l a y ' s r e c e i v e r .
C h e c k f o r a n y o b s t a c l e b e t w e e n t h e r e m o t e c o n t r o l
a n d d i s p l a y .
T h i s s o u n d i s p r o d u c e d w h e n t h e c a b i n e t e x p a n d s
o r c o n t r a c t d u e t o v a r i a t i o n s i n t e m p e r a t u r e .
T h i s s o u n d d o e s n o t i n d i c a t e d t h a t t h e d i s p l a y
h a s a p r o b l e m .
C h e c k w h e t h e r y o u r A V e q u i p m e n t i s a f f e c t e d b y
i n t e r f e r e n c e f r o m a u t o m o b i l e s , t r a i n s ,
h i g h - v o l t a g e t r a n s m i s s i o n l i n e s , n e o n s i g n s o r
o t h e r p o t e n t i a l s o u r c e s o f i n t e r f e r e n c e .
C h e c k w h e t h e r a l l p i c t u r e a d j u s t m e n t h a v e b e e n
p r o p e r l y m a d e .
C h e c k w h e t h e r s c r e e n p o s i t i o n a n d s i z e h a v e b e e n
p r o p e r l y a d j u s t e d .
I n p u t p r o p e r s i g n a l s .
M a k e s u r e t h a t t h e v e r t i c a l f r e q u e n c y o f t h e i n p u t
s i g n a l i s 8 5 H z o r l e s s f o r S V G A , 7 5 H z o r l e s s f o r
X V G A / S X G A , 6 0 H z o r l e s s f o r U X G A .
I n p u t p r o p e r s i g n a l s .
M a k e s u r e t h a t t h e v e r t i c a l f r e q u e n c y o f t h e i n p u t
s i g n a l i s 8 5 H z o r l e s s f o r S V G A , 7 5 H z o r l e s s f o r
X V G A / S X G A , 6 0 H z o r l e s s f o r U X G A .
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