Fukuda Denshi 4R2043, Service Manual

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7/16/2019 Fukuda Denshi FX-2111 ECG - Service Manual (1)
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2
.
8
.
2 V
i
r t
u
a
l
l y
N
o C
ha
r
g
i
n
g I
s
Ma
d e D
e
s p i
t e
" CH A
R
G IN G
C
OM
P
L E T E
"
o
n D i
sp
l
a
y
( 1
)
C
he
c k
t h
e c i r c ui
t
a r ou
n
d I C
1
8 .
1
)
V eri f y
t
h
a
t
t
h
e
s
o u r c e sid e of Q
17
i s suppli
e
d w
i t
h +
24
V .
If
n
o
t , c
o
n
d
u
c t
t h
e s tep s de s c
r
i
be
d i n "8
.
3
+
2
4
V I s
N
ot
Ou t
pu
t :
'
2
)
V eri
f
y t ha
t
p
i
n
1
4
(
M O
D
) o
f
I C
1
8
o
u t pu
t
s
a
r ec
t
an gula r w
ave
a t
app r o x ima
t
el
y
1
4
0kH
z
;
t
h e d
r
a
i
n ( T P
52
)
o
f
Q 17 o
u t
pu
t s a
r
e
c
t
angula r
w
av
e
a
t
app r
o
x i
m a
t e ly
1
4
0k
Hz
; a
n
d p i n 9 (
SN
S
)
o
f
I C
1
8 o
u
t
p
u
t s a
t
r i angula r
w
av e
a
t
a
pp r
o
xi
ma
t
el
y
1
4
0
k H
z .
If
n o t ,
c
he
c k t
h
e
f
o
l
l
o
w ing
:
. R 1 8
a n
d R 8
2
,
i
n
c l
u
d
i
n
g
t h e
i
r m
ou
n ti n
g
co n
d
i t i
o
n
.
0
1
7
,
Q 1 0 ,
0
1 6 , an d D2
2
.
If
a bo
ve com
p
o
n en
t
s
a
r
e f o
u n
d
n
ormal
,
I
C
1
8
m
ay
b
e faul
t
y
.
N O T
E
:
Cha
r
g in g
c
u r r en
t i s
de tec t e d a
s a
v o
l
t a g e
v
a
l
u e a
t
pi n 9 ( SN
S)
,
t h e
r
e
by
s wi
tc
h
i
n g t h e o u t p u
t
of pi n 1 4
(
MO
D )
.
( 2 ) Che c k t h e n umbe r o f c h a r g e - d is c ha r g e ti me s an d t h e numbe r o f o p e r -
a t
in g
t
ime s
a
ft
e
r c
h
a r g ing
.
U
s u all
y
, t h
e
n u m be
r
of
cha
r g
e
-
d
isca r g
e
t i me
s i s 2 00 m a x
, t h o u g
h
i
t m a y
d
e
c r
e a
s e de
p en
d i
n
g o
n t h
e o
p
e r
a
t
i n
g e
n v i
r on
m
e
n t .
Th e
l
a r ge r t h e num b e r o
f
o p e r a t
i
n g t
i
me s af t e r c h a r g i n g ,
t
h e s h o r
t
e r
t
h
e ser
vi
c e
l
i
f
e o
f
b
a t
te r
y be
come s
.
Thus
,
i
f
t h
e
c
h
a r g in g
c
i r c u i t i s f o un d
n
orma
l
but v
i
r t u a
l
l y
n
o
cha r g
i
n g
i s m a d e d e sp
i
t e "C H A
R
GI N G C O M
P
L E T
E"
o n d ispl
a
y
,
t h e b a
t
te
r
y m
ay
e xh
au s
t
t
h
e s
e
r v i c e lif e .
2
.
9 L C D Opera t i o n Is Ab n o r ma l
( 1
)
Ch
e c k su re con ne c t
io
n b e
t
w e e n
t
h e P2 c onnec t o r o n t h e ma
i
n b oa rd
a
n
d
t h
e conn
e
c t o r o f L C D .
C he
c k t
h
e c o
n n e
c t o r t
ermin
al s f o r a
ny
p
os s i bl e i
n
f eri o r
s
o
l
der i
n
g
.
(
2
)
V
eri
f y
t h
e fo l
lo
w i
n
g v o l t
a ge
s o
n t h
e P 2 connec to
r :
GN
D
l
e
v
e l a
t
p
i
n 1 ( V s
s)
+ 5
V
a t p
i
n 2 (
V
d
d
)
+ 0 .
23
8
V
a
t pi
n
3
(
V
e e)
( 3
)
C
he
c k
t h
e c o
n
t i nui t
y
o f
t h
e fol
lo
w i
n
g s
i
gna
l
li
n e
s r
e
f e
r
r i
n
g t
o
"
4 .
2 L C D
C o n t r o l C i r c u i t !'
R
s
sig
n
a
l
R
/
W
E
s
i gna l
Signal
s
o
f
D
B0 t o
D
B
7
N
O T
E :
T
h e
L C D m o
d u
l
e
u
sed
fo
r F X-
2
11
1
h a
s a b u i
l
t -
i
n co
n
t
r o
l d r
iv
e
r
a
nd
i
s d i r
e
c
t l
y
a ccess e
d by
t h
e C PU
,
wi
t
h
M
E
MO
R Y
R
E A
D
Y p
u t .
3
-
7
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