IF-170 Boa
rd
flow
cha
rt
VF
D
do
es
no
t li
gh
t
Is
there
vol
tage
ab
out
5.8
V
at
PS1201?(MB board)
No
Check the +5.8V at CN702 pin7
Is
here
the
F
FC
di
sc
on
ne
cte
d f
ro
m
CN
70
2?
Is
pin5
of
IC
70
2 osci
lla
ing?
Ye
s
Is
the
re
inp
ut
of
pu
lse
to
pins
7,
8 and
9 of
IC
70
2?
Ye
s
Rep
lace
IC
702
If the symptoms do not improve, repl
ace
he
IF
bo
ard
Ye
s
Ye
s
Re
pla
ce
P
S1
20
1(
MB
B
oa
rd
)
If t
he
sy
mp
tom
s d
o n
ot
im
pr
ov
e,
re
pla
ce
IF
B
oa
rd
Check
the
ci
rcui
ts
surrou
ng
ing
the
VF
D
DCD
CO
NV
ER
TE
R.
Is
h
ere
vo
lta
ge
at
C
N7
02
pi
n1
1?
Repl
ace
IC
702.
If no
eff
ect,
rep
lace
the
IF Board
No
No
9-9
To
F
co
n f
low
ch
art
No
No
Check
the
pattern around
CN
12
04
(M
B
bo
ard
)
If
he symptoms do not improve, replace
MB Board
No
Re
co
nn
ec
t th
e F
FC
If the symptoms do not improve, replace FFC
Ye
s
Is
ther
e v
olt
ag
e a
bo
ut
-2
5V
at
JL
70
1?
No
Y
es
Is
the
vol
tage
of
3.3V at IC702 pin 43
and pin13?
No
Y
es
Ch
ec
k
he
pa
tte
rn
3.3
V
lin
e o
f
F b
oa
rd
Ye
s
To
IF
co
n f
low
ch
art
No
Is
the
re
inp
ut
pu
lse
to
CN7
02
pins
13,
15
and
16?
To
IF
co
n f
low
ch
art
Is
he
F
FC
disc
onnect
ed
from CN702?
Rep
lac
e FFC
. If
th
e s
ym
pto
ms
do
no
t
improves, replace IF board
Is
the
re
inp
ut
pu
lse
to
CN12
04
pins
8,
9 and
11?
Re
co
nn
ec
t th
e F
FC
If the symptoms do not improve, replace FFC
Ye
s
No
Ye
s
No
No
Check FFC disconnected from CN702 or broken
Re
co
nn
ec
t th
e F
FC
If
he symptoms do not improve, change
the IF board
Ye
s
ch
an
ge
IF board
No
BDP-BX58/S480/S483/S580