Tektronix TYPE Z PLIG-IN, Instruction Manual

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Maintenance — Type Z
TH R U ST S P R IN G
(S h o w n ro tate d
F R A M E C O N T A C T S 1 8 0 ° ,ro m co rre c‘
Fig. 4-1. B VOLTS/CM turret attenuator removed from the Z Unit.
3. To remount the turret body, align the holes in the end
caps with the index pins. Fit the end caps to the turret
body.
4. Note the setting of the knob and then rotate the knob
so the bent ends rather than the open ends of the thrust
spring will accept the turret.
5. Slide the turret into the frame. Make sure the contacts
(indicated in Fig. 4-1) are aligned with the contacts on the
turret.
6. Rotate the knob to its original setting. Slide the shaft
through the turret and through the rear hole in the frame.
Check alignment of contacts while carefully rotating the
turret. Tighten the set screw.
7. If the bent ends of the thrust spring are not located
between the roll pins, rotate the thrust spring around the
shaft until it is properly positioned. When this is done,
the bent ends of the spring will not strike the detent wheel
stop as the turret is rotated.
If the entire VO LTS/CM turret attenuator is to be re­
moved or replaced, the complete switch can be removed
as a unit the same as a conventional rotary switch. When
ordering a replacement switch, refer to the Parts List for
the wired switch part number.
Ceramic Terminal Strips
Damaged ceramic terminal strips are most easily removed
by unsoldering all connections and then using a plastic
or hard rubber mallet to knock the yokes out of the chassis.
This can be done by tapping on the ends of the yokes
protruding through the chassis. When a new strip is
ordered, the yokes are furnished with and are attached
to the strip. New spacers need not be ordered because
the original spacers can be used two or three times before
they become too loose to hold the yokes securely.
When the damaged strip and yoke assembly have been
removed, place the spacers for the new strip assembly
into the holes in the chassis. Using a plastic or hard rubber
mallet, tap the ceramic strip lightly above the yokes to
drive the yoke pins down through the spacers. Be certain
that the yoke pins are driven completely through. Using
a pair of diagonal cutters, cut off the excess length of the
yoke pins. Fig. 4-2 illustrates the w ay that the parts fit
together.
C e ra m ic S trip Y o k e
Fig. 4-2. Installation of ceramic terminal strips.
®
4-2