Table of Contents
Advertisement
6.2.7.7. Removal o f final X/Z amplifier unit
- Unplug
6
multipole connectors.
- Unplug 1 coaxial cable.
- Unplug
2
single-wire connectors from the time-base.
-
Remove very carefully the
WARNING:
Handle the CRT carefully. Rough handling or scratching can cause the CRT to implode.
In particular be very careful with the side connections of the CRT. If these pins are bent the
CRT is likely to develop a loss of vacuum.
3
- Remove
fixing screws.
- Lift the unit a l i t t l e out of i t s bottom fixing points.
- Unplug
2
wires, that originate from the CRT socket.
CAUTION:
These wires carry the -1500Volt life voltages for the CRT; they may neither be touched nor
be short-circuited to earth if the instrument is working.
- Unplug 2 wires, that originate from the CAL output socket on the front panel.
- Take the unit out of the instrument.
When remounting follow the procedure above in reversed sequence.
- Unplug one multipole connector from the conductor side a t the unit.
- Remove very carefully the two side connections of the Y-deflection plates from the CRT. I t is also possible
to unsolder the two connection wires on the unit.
WARNING:
Handle the CRT carefully, Rough handling or scratching can cause the CRT to implode.
In particular be very careful with the side connections of the CRT. If these pins are bent the
CRT is likely to develop a loss of vacuum.
- Remove the two screws that secure the unit to the left-hand chassis plate.
- Remove the two "star" screws in the heat-sink of the OM518 resistance network that secure the unit to the
left-hand chassis plate.
- Unplug the two connections of the delay line from the conductor side of the unit.
- Remove one "star" screw that secures the delay line to the conductor side
R7, R8, R9, R 1 0
- For
For R1,
R2, R3, R4, R5
- Remove the fixing nut of the potentiometer.
- Unsolder the wires of the potentiometer and take
- Remove the coupling-disc by pulling it of the potentiometer shaft. Bear in mind that the coupling discs of
the potentiometers with a push-pull function are secured with a fixing-washer.
6.2.7.10. Removal of coupling piece
-
Remove the potentiometer according to chapter
-
Pull the plastic fixing spring out
- Remove the coupling piece from the plastic shaft.
- Remove the knob from the plastic shaft; remove the plastic cap from the knob, remove the screw inside the
knob and pull the knob off.
- Slide the plastic shaft backwards out of the instrument.
IMPORTANT:
2
side connections of the CRT
and R11: remove the pre-amplifier and trigger unit according to chapter
and R6: remove the time base unit according to chapter
of
the coupling piece.
When rearranging the coupling piece take care that the flat side a t the ends of the plastic
shaft and the potentiometer shaft fits correctly in the hole of the coupling discs.
of
the unit.
out of the coupling piece and the potentiometer unit.
it
6.2.7.9.
6.2.7.2.
6.2.7.3.
Advertisement
Table of Contents
