42
Subject to change without notice
4
-6 Volt accuracy check
– Locate and identify check point socket.
– Locate and identify check point socket M9001 on X Y-
Board.
– Locate and identify pin 6 at socket M9001.
– Check that -6 Volt (± 50 mV) can be measured at pin 6 with
respect to ground (chassis).
5
Y plate voltage check
– Switch the instrument OFF.
– Locate and identify the Y fi nal stage transistors T9017 and
T9024 mounted at the rear chassis.
– Connect both collectors together (connected with the
Y plates) by a wire (short). The collectors are the centre
leads of the transistors.
– Switch the instrument ON.
– Check that +85 Volt (± 2 V) can be measured at the collectors
with respect to ground (chassis).
– Switch the instrument OFF.
– Remove the short between the Y fi nal stage collectors
(Y plates).
– Switch the instrument ON.
6
R6013:
CRT minimum intensity
– Locate and identify R6013 CR-Board.
– Set INTENS. control to fully left position.
– Press X-Y pushbutton (IN position).
– Adjust R6013 so that the dot just disappears.
– Release XY pushbutton.
CR-Board
R6013
RV6024
A d j u s t m e n t P r o c e d e r e H M 3 0 3 - 6
