Epson LQ 1050 Technical Manual - Page 67
Regulator Circuit
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2.3.2.7 +24 VDC Regulator Circuit Figure 2-22 shows the +24V regulator circuit. REV.-A The +24VDC regulator circuit has almost the same function and employs the same oscillation circuit as the + 5V VDC regulator circuit. Here, the error amplifier AMP 2 is used for over-current control, and AMP 3 for constant-voltage control. The operation of the error amplifier AMP 3 is as follows. +0 011 C3748 L1 R3 4 b24VDC NJM2355 (7A) 11 Osc ~ 1'1 VREF n 1 14 15 16 R17 3.3K ( - - 4) R16 1OOK ( * ) ik 105C C3 1 IK D15 EO;;;:GA 30 Poo Figure 2-22. +24V Regulator Circuit ?6 $. IK 1% ?2 !4K Is -ONo 2-23
REV.-A
2.3.2.7 +24
VDC
Regulator Circuit
Figure 2-22 shows the
+24V
regulator circuit.
The +24VDC regulator circuit has almost the same function and employs the same oscillation circuit
as the + 5V
VDC
regulator circuit.
Here, the error amplifier AMP 2 is used for over-current control, and AMP 3 for constant-voltage control.
The operation of the error amplifier AMP 3 is as follows.
011
C3748
L1
R3
+0
NJM2355
(7A)
11
1’1
Osc
~
n
105C
C3
VREF
1
14
15
16
1
IK
R17
3.3K
(
—
—
4
)
R16
)
1OOK
(
*
ik
4
b24VDC
?6
$.
IK
1%
?2
!4K
Is
-ONo
D15
EO;;;:GA
30
Poo
Figure 2-22.
+24V
Regulator Circuit
2-23