Service Modes, Error Codes, and Fault Finding
5.
Figure 5-11 “Semi Stand-by” to “Active” flowchart (EEFL or LED backlight 50/100 Hz only)
1
8
770_25
3
_100216.ep
s
100216
Active
S
emi
S
tandby
Initi
a
lize
au
dio
a
nd video
proce
ss
ing IC'
s
a
nd f
u
nction
s
a
ccording needed
us
e c
as
e.
A
ss
ert RGB video
b
l
a
nking
a
nd
au
dio m
u
te
W
a
it
u
ntil previo
us
on-
s
t
a
te i
s
left more th
a
n 2
s
econd
s a
go. (to prevent LCD di
s
pl
a
y pro
b
lem
s
)
The
assu
mption here i
s
th
a
t
a
f
as
t toggle (<2
s
) c
a
n
only h
a
ppen d
u
ring ON->
S
EMI ->ON. In the
s
e
s
t
a
te
s
,
the AVC i
s
s
till
a
ctive
a
nd c
a
n provide the 2
s
del
a
y. A
tr
a
n
s
ition ON->
S
EMI->
S
TBY->
S
EMI->ON c
a
nnot
b
e
m
a
de in le
ss
th
a
n 2
s
,
b
ec
aus
e the
s
t
a
nd
b
y
s
t
a
te will
b
e m
a
int
a
ined for
a
t le
as
t 4
s
.
S
witch A
u
dio-Re
s
et low
a
nd w
a
it 5m
s
Con
s
tr
a
int
s
t
a
ken into
a
cco
u
nt:
- Di
s
pl
a
y m
a
y only
b
e
s
t
a
rted when v
a
lid LVD
S
o
u
tp
u
t clock c
a
n
b
e delivered
b
y the AVC.
- To h
a
ve
a
reli
ab
le oper
a
tion of the EEFL
ba
cklight, the
ba
cklight
s
ho
u
ld
b
e driven with
a
m
a
xim
u
m PWM d
u
ty
cycle d
u
ring the fir
s
t
s
econd
s
. Only
a
fter thi
s
fir
s
t one or two
s
econd
s
, the PWM m
a
y
b
e
s
et to the re
qu
ired o
u
tp
u
t
level (Note th
a
t the PWM o
u
tp
u
t
s
ho
u
ld
b
e pre
s
ent
b
efore the
ba
cklight i
s
s
witched on). To minimize the
a
rtef
a
ct
s
,
the pict
u
re
s
ho
u
ld only
b
e
u
n
b
l
a
nked
a
fter the
s
e fir
s
t
s
econd
s
.
Re
s
tore dimming
ba
cklight fe
a
t
u
re, PWM
a
nd BOO
S
T o
u
tp
u
t
a
nd
u
n
b
l
a
nk the video.
W
a
it
u
ntil v
a
lid
a
nd
s
t
ab
le
au
dio
a
nd video, corre
s
ponding to the
re
qu
e
s
ted o
u
tp
u
t i
s
delivered
b
y the AVC
AND
the
ba
cklight h
as
b
een
s
witched on for
a
t le
as
t the time which i
s
indic
a
ted in the di
s
pl
a
y file
as
prehe
a
t time.
The higher level re
qu
irement i
s
th
a
t
au
dio
a
nd video
s
ho
u
ld
b
e dem
u
ted witho
u
t tr
a
n
s
ient effect
s
a
nd th
a
t
the
au
dio
s
ho
u
ld
b
e dem
u
ted m
a
xim
u
m 1
s
b
efore or
a
t the
sa
me time
as
the
u
n
b
l
a
nking of the video.
Rele
as
e
au
dio m
u
te
a
nd w
a
it 100m
s
b
efore
a
ny other
au
dio
h
a
ndling i
s
done (e.g. vol
u
me ch
a
nge)
CPipe
a
lre
a
dy gener
a
te
s
a
v
a
lid o
u
tp
u
t
clock in the
s
emi-
s
t
a
nd
b
y
s
t
a
te: di
s
pl
a
y
s
t
a
rt
u
p c
a
n
s
t
a
rt immedi
a
tely when le
a
ving
the
s
emi-
s
t
a
nd
b
y
s
t
a
te.
S
witch on LCD
ba
cklight (L
a
mp-ON)
S
witch off the dimming
ba
cklight fe
a
t
u
re,
s
et
the BOO
S
T control to nomin
a
l
a
nd m
a
ke
su
re
PWM o
u
tp
u
t i
s
s
et to m
a
xim
u
m
a
llowed PWM
S
witch on the Am
b
ilight f
u
nction
a
lity
a
ccording the l
as
t
s
t
a
t
us
s
etting
s
.
Del
a
y L
a
mp-on with the
su
m of the LVD
S
del
a
y
a
nd
the L
a
mp del
a
y indic
a
ted in the di
s
pl
a
y file
S
witch on the di
s
pl
a
y power
b
y
s
witching LCD-PWR-ON low
W
a
it x m
s
S
witch on LVD
S
o
u
tp
u
t in the
8
5500
No
The ex
a
ct timing
s
to
s
witch on the
di
s
pl
a
y (LVD
S
del
a
y, l
a
mp del
a
y)
a
re defined in the
di
s
pl
a
y file.
S
t
a
rt POK line
detection
a
lgorithm
ret
u
rn
Di
s
pl
a
y
a
lre
a
dy on?
(
s
pl
as
h
s
creen)
Ye
s
Di
s
pl
a
y cfg file pre
s
ent
a
nd
u
p to d
a
te,
a
ccording
correct di
s
pl
a
y option?
S
t
a
rt
u
p
s
creen Option
a
nd In
s
t
a
ll
a
tion
s
etting
Photo
s
creen ON?
Ye
s
No
Prep
a
re
S
t
a
rt
s
creen Di
s
pl
a
y config
file
a
nd copy to Fl
as
h
No
Ye
s
A LED
s
et doe
s
not norm
a
lly need
a
prehe
a
t time. The prehe
a
t rem
a
in
s
pre
s
ent
bu
t i
s
s
et to zero in the di
s
pl
a
y file.
