30
BDP-LX55
1
2
3
4
A
B
C
D
E
F
1
2
3
4
4. [
8
] PDXY Check
For PDXY Check, the mis
a
lignment of pick-
u
p optic
a
l
a
xis c
a
n be checked.
The optic
a
l
a
xis mis
a
lignments of X-
a
xis
a
nd Y-
a
xis
a
re displ
a
yed [PDX]
a
nd [PDY] with %,
respectively.
All of CD, DVD,
a
nd BD c
a
n be me
a
s
u
red.
The method for c
a
lc
u
l
a
ting PDX
a
nd PDY is shown below.
[ Instr
u
ctions ]
1
Insert
a
disc (BD, DVD, CD) in
a
nom
a
l mode. If the pl
a
yb
a
ck st
a
rts, p
au
se it.
Displ
a
y the home men
u
a
nd enter into the Service Mode.
In this mode, the me
a
s
u
rement c
a
n be c
a
rried o
u
t
a
t
a
n
a
rbitr
a
ry pl
a
ce. After
a
disc is inserted, pl
a
y
a
nd
stop the point yo
u
w
a
nt to me
a
s
u
re,
a
nd then enter into the Service Mode.
(The pick-
u
p position does not ret
u
rn even in this st
a
t
u
s. The me
a
s
u
rement
a
t the pl
a
ce is
a
v
a
il
a
ble.)
2
Select "[
8
] PDXY Check" with the
key from the Service Mode screen,
a
nd press the [ENTER] key.
3
After the me
a
s
u
rement is st
a
rted
a
nd completed, the me
a
s
u
rement v
a
l
u
e is displ
a
yed. If the v
a
l
u
e is
within the reference v
a
l
u
e, "P
a
ss" is displ
a
yed.
[Effective indic
a
tions]
Defect rel
a
ted to pl
a
yb
a
ck (block noise, so
u
nd j
u
mping, im
a
ge j
u
mping, disc is p
au
sed, freeze of screen etc.)
If
a
n NG is gener
a
ted in
a
specific disc only, the defect is likely to be c
au
sed by the disc. If
a
n NG is
gener
a
ted in other discs too, the defect is likely to be c
au
sed by the pick-
u
p p
a
rt. If the me
a
s
u
rement v
a
l
u
e
is very close to 40% even if
a
n NG is not gener
a
ted, the NG is likely to be c
au
sed by the disc.
PDX = ((A+B)-(C+D)) / (A+B+C+D)
PDY = ((A+D)-(B+C)) / (A+B+C+D)
