Table of Contents
Advertisement
4.7
Secondary Control Circuits
As shown in Figure 4-7, the secondary control circuit for low voltage
output senses the +5 V output voltage, feeds it into ICO1l volume RVOI1,
compares it with the reference voltage incorporated in the IC, interprets
any discrepancy as a current change, creates a current flow in the
photocoupler PCO1 diode, and transmits it to the primary control circuit.
Figure 4-8 shows the secondary control circuit for the plasma.
The
principle of operation of this circuit is similar to that just described
2
t
it
+
ee
T140
cola
3
-
°
R3
6
io
|
y
R22!
4
D2!
PtH
p22
3 2]
coins
Figure 4-7
Secondary Control Circuits for Low Voltage
15
LO!
y
DO!
a
r
.
a
[wrwn
e
~
IG
mm
COT
COI ~ C04
| " !
I7,8
-- [+
Figure 4-8
Secondary Control Circuits for Plasma
- Quick Links:
- Table of Contents
Hide quick links:
Advertisement
Table of Contents
Troubleshooting
