Tektronix 465 - Low-Voltage Power Supply Circuit

f 0672 and 0682 to allow signal amplification. R675 adjusts
~~~~f,t for correct DC balance in the circuit.
~\ (~~·;~·;~:~/'
Normally, the output of the Vertical Switching Ampli-
fier is applied to the input of the Delay Line. When the
TRIG VIEW pushbutton is pressed, the signal from the
Vertical Switching Amplifier is removed and the output
from the A Trigger View Amplifier is applied in its place.
Circuit Description-465
LOW-VOLTAGE POWER SUPPLY
General
The Low-Voltage Power Supply circuit provides the
operating power for this instrument from four regulated
supplies and one unregulated supply. Electronic regulation
is used to provide stable, low-ripple output voltages. Fig.
3-11 shows a detailed block diagram of the Power Supply
circuit. A schematic of this circuit is shown at the back of
this manual.
,--------------------------------Unregulated +120 V
Line
Voltage-
S1503
S1501
IPOWERt-
Regulating
Range -
Selector
Power
Input
r -
Line
Input
''
~
-·
r;
@
+55
Rectifier
CR1511
CR1514
C1511
IC1510
+15 V
Rectifier
CR1541
+5V
Rectifier
CR1551
-BV
Rectifier
CR1561
Crowbar
Circuit
01514
R1511
R1543
R1553
+55 V
Series
Regulator
01534
+15 V
Series
+15 V
Regulator
01546
+5V
Series
+5V
Regulator
01556
-SV
Series 1--41----tl~ -8 V
Regulator
01566
Fig. 3-11. Detailed block diagram of the Low Voltage Power Supply.
+55 V
LINE Trigger
Signal
3-19