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Hitachi SR-2004 Service Manual page 17

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PRINTED WIRING BOARD· PLAN DE BASE
AC printed wiring board
Main printed wiring board
The terminal No. shows the stamp on the printed
wiring board. This number matches the number in
the circuit diagram.
HITACHI 51l-2004
Le N° de borne correspond
a
I'indication de la
plaquette
a
circuit imprime. Ce numero correspond
au numero du schema de montage.
-t
o
o
--J
~
::0
o
--J
(}l
::0
-i
@
",1
..
~
;0
If)
o
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~
€'I'I.2R
....
~
-i
(j)~'"
r
I
I
.
,;1
i
<D
C721R
~
........
b7~~
.
. .
.
Q713R
B~£'
070eR
."
I~c,
."
....
o
.~
Crt3R
~-U
..
R735R
10;'
~.-
~
.;;)
TO
0716R,0717R
Q
0 0
o
Q.7,IOR
8-¥-E
o
.
- - . .
. ,
R~R
a
-..ho
A E .
R127.R
-, ,
.' ..
~
,
,..~~
. . . .
Q709R
R722R
~ ~ ~
, .
R~.
R72,sR
'
..
--'
~
87'21R
__ ,R719R.
~.
_,
-~
~
...
,.~
,
,
Q708R
R720R.
.E~8~
,,:i
,0702R
I~
~
TO DC SUPPLY CIRCUIT
TO
DC SUPPLY CIRCIT
L7'OIR
~
D103R
.,.,'
.
.
R7',3R
,..
~
"
~,
,-
C710R
._,,-
. . : -
R714R,
. .
.
--1 ...
.
I.··~
C711A
07051',
.R.i. . . . . . .
,~
........
o'iXl3R
'Q7Q4R
Q7O!)R
o
o
o
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o
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:1)
~
6
o
()
;u
.
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o
-'
0702L
.
~
.
~~e
07'09L
o
0710L
9~E
"
; j
:e
TO
0716L,0717L
R732L
' >
..,
....
o
r
Q7111-
B~E
R722L
----vvv----
R724L
•.
.
~
.~
R721L
~
..,
....
o
N
,..
TO
DC PWB
C713L
......
VA702L
~
R7iJ'IL
~
~
:s
~.
r
0712L
9~E
RlO6l..
C735L.
~~I::..
. ,
RaQ701~
4.
;.:-
~
....
E:'~.B
_
R107L
~E:~
~
Q702L
• •
o
<;705L
~
.......
R7(BL
~
The circuit symbol (..- ) means a fuse resistor. When replacing it with new one, refer to the CAUTION on page 19.
Le symbole de circuit (
) signifie qu'il s'agit d'une resistance
a
fusible. Consulter les instructions "ATTENTION"
de la page 19 pour effectuer son remplacement.
b
+~i
0 0 0
-17-
'R7~L
~
-i
"
r
o
o
~
.~.
ZD705L R a
" ,
C~7L
R713l..
,,-
.... '.
...
...
~
R739L
R717L
C7I<11-
:S~~~
.-t
4> .
, __.....,
'
C710L
07061-
'R714L
0 7 0 5 L ' "
1!
R748L
.....
B~E
~ .
. .
.•
0703L
R711L.
. .
~ . ~
..
_.
0710L
07051-
0704L
07'OpL
R712L.
.1
B~E
B~E
B~E
•.
-
~LQ]
.
.. [QJ
.-J' "
VA70IL
C712L
.
0: '~. ' ~'::'''~L.
0 . '
.
20702L
. .
C720L
.
...
.
~
.......
Z0704L
R740L
.
~
~'h
R72.6L
~L
. .
R735..1-
.
.---=----w;,...
r
' .
D71~I-~LE
!;j
1
I
r
~
R'725L
\HI,
~~
R720L
~B~E
i
""'"
,070BL
I
;><
i
o
--J
(}l
r
-t
o
o
--J
E
r
C7 191-
-
+
..,...
-i
::, ..
I
@I
r
®
-i
"
r ~(])
CD
I
I
---1.1-
I
Plier
P inoes radio
6)
(8)
(9
I
~
Caution:
• In order to keep the distance between the legs of the
relay (RY901) on the AC PW.B. and the chassis, cut the
legs a bit (1.5 mm) after replacing and soldering the relay.
• Pay attention to the following when replacing the
thermal fuse (F903).
I) Be careful since the enclosed section may crack if the
force is applied to the base of the main body when
bending the lead wire of the thermal fuse.
2) Carry ou t soldering while radiating heat using a pair
of radio pliers as shown in the figure below.
Attention:
• Pour conserver la distance entre les pieds du relais (RY
901), de la plaquette
a
circuit imprime C.A. et Ie chassis,
couper legerement les pieds(l,smm)apres avoir remplace
les soudures de relais.
• Faire attention aux points suivants quand Ie fusible
thermique est remplace (F903).
1) Toutes les precautions necessaires doivent etre prises
pour ne pas briser la section close si une force est ap-
pliquee au chassis de la partie principale quand Ie fi1
de jonction du fusible thermique est tordu.
2) Effectuer la soudure en emettant la chaleur avec une
paire de pinces rarlio comme indique sur l'illustration
ci-dessous.
.'
I>
Plier
Enclosed section
Pinces radio~
~Section close
I A
~
e
-
e

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