25/08/2004 ©
Söring
Service-Manual Arco- and RF-units
1
not valid for A-3000/ -2000
2
not valid for Arco-2000
-37-
3
not valid for MBC600
4
not valid for Arco-1000
Block diagram Cut module
ra
nge
sel
e
ct
ion
dr
iv
e
r
M
u
lt
ip
lie
r
Ux
I
Os
cil
lat
or
ca
. 35
0k
Hz
ou
tp
ut
s
tag
e
(M
O
S
-b
ri
dg
e)
fi
lt
e
r
po
w
e
r
co
nt
ro
l
ra
ng
e
se
le
ct
ion
cu
rre
nt
co
nt
ro
l
cu
r
re
n
t/
vo
lta
g
e-
de
tec
tio
n
Pu
ls
e-
osc
ill
ato
r
Pu
lse
w
id
th
ov
er
ton
e
-
de
te
ct
io
n
el
ec
tr
ic
a
rc
-
b
o
rd
er v
a
lu
e
e
lec
tr
ic
ar
c-
co
nt
ro
l
L
ogi
c
c
y
c
le co
nt
ro
l
In
te
r
fa
ce
Busi
nter
fac
e
anal
og
/ d
ig
ital
ON
(1
)
PW
R_
SE
L
(3
)
CU
RR
_
S
EL(
1
)
MO
N
O
/B
IP
O
(1
)
CO
/C
UT(
1
)
PUL
S
E(
1
)
PW_SE
T
(A
)
I_S
E
T
(A
)
F
R
Q
_
SET(A)
DU
T
Y
_
S
ET
(A
)
DO
W
N
PW
_
R
E
G
SP_
R
E
G
ON
ON
BR
_
E
N
A
BL
E
M
o
n
o
/B
ip
o
M
o
no
/B
ip
o
ou
tpu
t tr
an
sf
or
m
er
HF
_
O
U
T
U
I
PW
R_
S
E
L
PW
_S
E
T
H
O
L
D
ON
PW_
R
E
G
Inte
rf
ac
e
Mo
no
/B
ip
o
FRQ
_
S
E
T
DU
T
Y
_
S
E
T
HOL
D
B
R
_E
N
A
BLE
SP
_
S
ET
U
I
CU
R
R
_
S
E
L
I_
S
E
T
ON
HO
L
D
DO
W
N
DOW
N
to I
n
te
rface
SP
_
R
E
G
In
te
rf
a
ce
