Tektronix PS280 - PS280 or PS283 Variable Outputs Block Diagram

Theory of Operation
AC Input
Reference
Voltage Source
<2>
Auxiliary Rectifier
and Filter
D1021-D1024
C103-C104
u
Transformer
O
Current Comparator
D105, D107
Amplifier
Q103-Q104
Reference Voltage
Amplifier
Voltage Comparator
Tracking Selector
Tracking Delay
U501-U502
Relay Control
Q501-Q503
Reference
Voltage Source
Auxiliary Rectifier
and Filter
D3021-D3024
C303-C304
Relay Control
RL101-RL102
JJ
Main Rectifier and Filter
D1011-D1014
u
Series Regulator
Q1071.R1261
Tracking
O/P Control
RL501-RL503
<3>
Relay Control
RL301-RL302
Current Comparator
0302. D307
Reference Voltage
Amplifier
Amplifier '
Q303-Q304
u
Main Rectifier and Filter
D3011-D3014
A """"A
Voltage Comparator
3_JJ.
Series Regulator
Q3071. R3261
Master Output
Slave Output
Figure 3-1: PS280 or PS283 Variable Outputs Block Diagram
P3280 & PS283 Laboratory uu power supply Module-Level Service Manual
REV AUG 1991