11
Subject to change without notice
S h o r t D e s c r i p t i o n o f H M 3 0 3 - 6 B o a r d s
5.2 COMPONENT TESTER
An oscillator generates the X and Y signal components (CTX
and CTY) of the component tester (CT) that can be changed
by a
pp
lying electronic parts (e.g. semiconductors, resistors,
capacitors etc.) to the COMP. TESTER sockets.
6 FC Board
The switches and potentiometers on this board enable the user
to control the instrument.
7 PS Board
This board contains a switch mode power supply with different
supply voltages for the instrument.
It also contains a –2 kV high voltage generator required for ca-
thode ray tube (CRT) operation. The voltage for the CRT heater
is generated by separate, isolated windings of the switch mode
power supply transformer as it is connected with -2 kV.
