Tektronix 7B92 Instruction Manual page 21

Maintenance-7B92 Service
NOTE
Before removing switch and control knobs, note the position of the knob to facilitate replacement and
to assure proper alignment.
1. Set the TIME/DIV OR DL Y TIME and DL Y'D Time/Division switches to .2 s to provide easy access to the set screw on the clear plastic
flange and to facilitate replacement of the time/division switches.
2. Press in the DL Y'D Time/Division switch. Loosen the set screws and remove the VARIABLE and DL Y'D Time/Division knobs.
3. Remove the set screw from the rear of the front-subpanel and remove the clear plastic flange associated with the TIME/DIV OR DL Y
TIME assembly.
4_ Loosen the set screws and remove the SLOPE, LEVEL, INTENSITY, and POSITION knobs.
5. Remove the spring from the 7B92 release latch.
6. Remove the front panel.
7. Remove the four set screws (one in each corner of the subpanel) holding the front-subpanel to the chassis. Pull out the front-subpanel to
allow removal of the switches.
8. Loosen the screws holding the switch (to be replaced) to the front-subpanel.
9. Loosen any multipin connector(s) associated with the switch being replaced and unsolder leads or components where necessary.
10. When the switch is clear from external connection, remove the complete switch assembly from the front-subpanel.
11. To replace a pushbutton switch, reverse the above procedure. Make sure that all switch knobs are replaced in the same position
as when they were removed.
Fig. 3-3. Pushbutton switch removal.
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