63
Subject to change without notice
40 VR7003: Trace Rotation check
– Locate and identify VR7003 “TR” on front panel.
– Using Y-Pos.I and X-Pos. controls, move baseline to the
centre of the graticule.
– Press CH I GND pushbutton (IN position).
– When turning VR7003, check that the range of inclination
of the baseline is at least 1mm at left and right horizontal
endpoints of the graticule.
– Adjust baseline to be displayed exactly parallel to the ho-
rizontal centre line of the graticule.
Do not change the instrument`s position and continue with
item 41.
Correct
Incorrect
Incorrect
41
RV4501:
Component-Tester trace inclination
– Check that the baseline is displayed exactly parallel to the
horizontal centre line of the graticule.
– Press COMP. TESTER pushbutton (IN position).
– Check that the COMP. Tester sockets are not short circui-
ted.
– Locate and identify RV4501 on CC-Board.
– Adjust RV4501 to rotate the trace (approx. 8 division length)
parallel to the horizontal centre line of the graticule.
Note: Despite usage of Mu-metal shielding of the CRT, due to
effects of the Earth`s magnetic fi eld small display deviations
cannot be entirely avoided.
Correct
Incorrect
Incorrect
CC-Board
RV4501
RV4502
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
