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-
P C-7200
2-D)Controll circuit
2-G)
Fig.
2·50
shows control circuit.
(a)-5V output
+5V
output
IS stebllfZmj by
opUcalisol~-;-errof'"'B.mpHfter-US::l2----FFicig:-2-58-(~-sAeWS--..6V~.,.tf*Jt-Girooit
.• - ..
,Ugh....tr.aquIiRCV.....Quipu
llt .... _ _ _
and transistor TR2,
(winding
11~10,
of T1) is rectified in diode D5 and filtered in C20, to
IC2 detects proportional voltage signal to +5V output.
develop the -5V output through the 3-terminal regulator IC1.
The signal is amplified by IC2.
The amplified signal is supplied to TR2 through the optical isolator
PC 1.
TR2 control pulse width of TRl and oscillation frequency.
Fill
OJ
1 ______ -,
pel·11l'
~
1
De
R28
1---1
2f111Rl01
~:
i ________
~2
_ _ _ _ _ _ _ _ _ _ _ .., PCHI2
ICJ
r-
I
I
cas
R'~
I
~ I
1
I
I
~
'"
I
I
~
; ........
i
+5VAOJ
1
·~-l
:
1 __ - - __ - - - - - - 1
Figure 2-50
2-E) + 12V output
Fig. 2-51 shows
+
12V output circuit.
High frequency output (winding 12,13 of T1) is rectified in bridge
OS2 and filtered in C16AB, and to develop the 12 volts output
through the 5-terminal regulator IC?
- - - - - - - - - - - - - - - - - - - - - - - - - - 1
1
,
T,I
I
,
,
Ii
-------------
I
t~
I
1
-,
I
I
it
l _____
J
. b9-l
,.
,
.
•
0
0
,
I ·
i
-
-,
' 1 -
"
,
--------=-----1
•
J'
,
,
,
1
I
1
I
F
L ____
J
••
. .
,
F
~ ~
,
,
r"
0
Figure 2-51
2-F) +5V output
Fig. 2-52 shows +5V output circuit.
High frequency output (winding A-B of T1) is rectified in bridge
OSW3 and filtered in C1 BA,B,C and L4 to develop the 5 volts output.
T,
r - - - - 1
I
:3
,
:3
" I'
I!
F
L ____
J
F·
~lq-l
'"
, ,
F
0
0
1-."
~,
1---
r -
r-
-- -
---,
"
I
I
I
I:
I
•
1
'~
L ____
..l
.
••
.
,
.
i:
, ,
,
I":_A
0
0
0
I
L _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
---
Figure 2-52
,
,
-
-
. .
1
,
1
I
1
I
-----
2-29
(b) -12V, -15V output
Fig. 2·53-(b) shows -12V, -15V output circuit. High frequency
outuput (winding 9-8, of T1) is rectified in diode 06 and filtered in
C22, to develop the -12V output through the 3-terminal regulator
IC2 and -15V output through the 3-terminal regulator IC2.
r - - - - - - - - - - - - - - - - - - - - - - - - - - - ,
,
1
I
os
I
1
I
!
J.--Flg (01
I
~
1
1
1
!...
___ J
:-
D6
---"1
1
1
1
1
I "
,
1
1
:
'
I
~Flglb)
1
,
:
I
1
,
1
,
I
I
I
,
L ____________________________
J
Figure 2-53
2-H) ACL signal circuit
Fig. 2-54 shows ACL circuit.
The ACL signal is provided with IC4.
1\,",---+---1--------[-,1 1.++++
I
R27
I
1
=,
,
________ ACe
OUTPUT
I
I
'
..
---..
1
1
,
1
~I
1 =
I
1
I
Figure 2-54
The following is operation of IC4.
a)Functional diagram
,~
A
,
,
, ,
p
Ie,
,
,
, ,
T
•
•
•
e"
e,"
e, ,
Figure 2-55
C27, C29; Noise
&
ripple suppression capaCitor.
C
T ;
Capacitor for timing
...
To
+5V
ACLoutput
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