Hitachi 51F710A/DP55, Руководство по обслуживанию

Страница: 92 / 187

91
DP
55
2.22 PROTECTION CIRCUIT BLOCK DIAGRAM 1/2
(POD
)
(T
V)
R
egulator
+5V
:I942
Sw
itch
in
g
Tr
ansfo
rm
er
T9
02
LIVE
CO
LD
AC
C
lock
I903
Fee
d B
ack
I906
RE
LA
Y
S9
02
Sw
itch
in
g
Tr
ansfo
rm
er
T9
01
R
ect
ifie
r
+2
9.0V
:D
96
0
D9
88
:>
12
.3V
Q
982
:>
6.5V
Vo
lta
ge C
on
tro
l
+5.
6V
:I9
41
Ove
r V
oltage
De
te
ct
or
Protect On
/Of
f
Sw
itch
:Q9
80/Q98
1
AC
C
lo
ck
60
Hz
DP
5X
Protect
ion
Circuit
B
lock
D
i
a
gram
(Power S
up
pl
y)
AC
Pl
ug
Sw
itching
Con
tro
l
I902
Fuse
F9
01
:8
A
Va
ris
to
r
X9
01
:4
71
AC
Input
Re
ct
ifier
D90
2
Li
ne
Fi
lter
L9
01
Re
ct
ifier
D90
1
Fu
se
F9
03:4
A
Si
gn
al
:
SiG
+5.6V
Si
gn
al
:
SB
Y+
7.
5V
Si
gn
al
:
Si
G+
10.5V
Au
dio
:
+2
9.
0V
Q
R
ect
ifie
r
+5.
6V
:D
95
5
Re
ct
ifier
+10.5
V:D
95
4
ZD
R
ect
ifie
r
+7
.5
V:
D
949
Li
ne
Fi
lter
L9
02
Tem
per
at
ur
e
Limi
ted
Fusing
Re
sist
or
F9
04:
Fu
se
F9
02:1
A
Vo
lta
ge C
on
tro
l
+7
.5
V:
D96
2
RE
LA
Y
S9
01
AC
-O
VP
I905
Power
On/Of
f
Sw
itc
h:Q
94
3
Power
On/Of
f
Sw
itc
h:Q
94
2
Sw
itching
Con
tro
l
I901
RE
LA
Y
S9
03
Power
On/Of
f
Sw
itc
h:Q
94
4
Fee
d B
ack
I904
Power
_3
On/Of
f
Po
w
er_1
On/O
ff
Pr
otec
to
r
E9
42: 5
Of
f
On
Of
f
On
uC
O
M
:
SB
Y+
5.
0V
Pr
otec
to
r
E9
40: 7
TO
Defl
ec
tion
Po
we
r Supp
ly
(D
P5
5/
DP
57
on
ly
).
RE
LA
Y
S9
04
DE
F CCT
Pr
ot
ec
t
SIG
CCT
Protect
CP
T CCT
Protect
>AC
175
V
Shunt
Prot
ecto
r
BACK TO ADJUSTMENTS