D E O D I S P L A Y B O A R D - Akai pdp4295ed Service Manual

2. V ID E O D IS P LA Y B O A R D
T h is is the s ig n a l in sid e the PDP and audio d e vice d is p o s itio n .
1) I t can re ce iv e co m p o site s ig n a l in c lu d in g R . G . B . H . V . c o n tra s t
s ig n a l, D V I d ig it a l s ig n a l, A V c o lo r d is tin c tio n s ig n a l and
S - V i d e o ..... e t c .
R . G .B .H .V .& Y Pb P r :The s ig n a l is in p u t from (15 P IN ) J1 & J1
D V I : D ig it a l s ig n a l is in p u t from P1 the managed by U6 and passed
to U 29 ,the s ig n a l is passed to U 33 f o r the o u tp u t o f v is u a l
s ig n a l output:.
AV & TV : A V & TV s ig n a l enters from J12 & JP18 to U 46 to
S -V id e o : S - V i d e o s ig n a l in p u t from J12 to U 47 to decode perform
to U 5 f o r v is u a l p ro d u c tio n and a fte r d e p o s itio n , i t w i l l pass
to U 7 f o r s ig n a l com pensation and to U 9 f o r v is u a l s ig n a l
d e p o s itio n o u tp u t.
2) A u d i o is in p u t from J3 , J8 and from U 62 to perform
p re -p ro d u c tio n . T h e n , the audio s ig n a l is passed to U61 SRS process
f o r the s ig n a l o u tp u t by J4 and J9.
3) W h e n audio s ig n a l the J4 passed to A m p l i f y f o r the f i n a l output:.
to U 6 to perform c o n tra s t s ig n a l ,then
transform to d ig it a l s ig n a l and e n te r to U 29 ,
the s ig n a l is passer to U 33 f o r the o u tp u t o f
v is u a l s ig n a l.
perform s ig n a l, then transform to U 47 to decode perform
s ig n a l, then transform to U 49 to d e in te rla c e perform s ig n a l
and e n te r to U 29 , the s ig n a l passed to U 33 f o r the o u tp u t
o f v is u a l s ig n a l.
s ig n a l ,then transform to U 49 to d e in te rla c e preform
s ig n a l and e n te r to U 29 , the s ig n a l passed to U 33 f o r the
o u tp u t o f v is u a l s ig n a l.
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