Zenith SM-ZVM-122 Service Manual page 25

FOCUS CONTROL
The Focus control is located at R215 on the CRT
socket circuit board. It is adjustable through a hole
in the circuit board. Refer to Figure 6-3. You will
have to remove the rear cover to make this adjust-
ment. With the screen full of characters, adjust the
Focus control for best all around focus.
B
+
ADJUSTMENT
The B
+
adjustment is located on the main board
o
Page 6-5
at RX709. To adjust B
+
voltage, remove the rear
cover. Then connect your voltmeter to ground and
the positive lead to the B
+
side of RX709. Refer
to Figure 6-3. Adjust the control for
+
12.7 VDC.
CRT CENTERING MAGNETS
The CRT Centering magnets are located in front of
the yoke on the neck of the CRT. Refer to Figure
6-3. Adjust the centering magnets to center the dis-
play.
CENTERING MAGNETS
FOCUS CONTROL
§FUSE
@
ADJUST
~ B+
~-
RX709
Figure 6-3
Monitor adjustment.