Tektronix 371B Service Manual page 123

371B Service Manual
Adjusting CRT Bias.
NOTE. R210 can be adjusted through the access hole in the high voltage shield.
3. ADJUST GRID BIAS adjustment R210 on the A20 H.V. Regulator board
until the CRT spot is barely visible.
Removing the Setup.
4. Change the following 371B settings:
INTENSITY
NON STORE/STORE/VIEW
READOUT/CURSOR
NOTE. The frame test pattern is also used in procedure B3 ("Examining and
Adjusting Astigmatism"). Proceed to Step 5 only if procedure B3 will not be
performed.
5. Press the Cursor SHIFT button to remove the test pattern.
Performance Verification
Optimum intensity
Optimum intensity
5-21