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Subject to change without notice
HM303-6 Troubleshooting
H M 3 0 3 - 6 T r o u b l e s h o o t i n g
Security advice!
The following procedures assume that the instrument is con-
nected to mains/line via a safety class II transformer.
Only qualifi ed personnel (technicians and engineers) who are
aware of the danger of electricity should execute the following
procedures.
If cables or connectors have to be disconnected, the instrument
must be switched off before removing them!
For measurement at high voltage (-1.5 kV focus and -2 kV
acceleration voltage) use suitable probes, recommended by
HAMEG.
Such measurements should be performed in the following
way:
1. Switch the oscilloscope off.
2. Connect measuring instrument reference potential con-
nector to chassis.
3. Connect the probe tip of the measuring instrument to the
measuring point.
4. Switch the oscilloscope on.
5. Before removing the measuring instrument connections,
switch the oscilloscope off again.
1 Opening the Oscilloscope
1.1 Place the oscilloscope upside down, set the handle in the
maximum position to the rear, then pull on both handle
knobs outward and remove the handle. (Photo 1.1 and 1.2)
1.2. Unscrew the nuts and remove the back panel. (Photo 1.3,
1.4, 1.5 and 1.6)
1.1
1.2
1.3
1.4
1.5
1.6
