P R E C A U T I O N S
1. Do not use the unit in any of the following locations:
* Places where the unit is exposed to direct sunlight.
* Places where temperature and humidity are high.
* Places where there are mechanical vibration.
* Places near equipment generating strong lines of
magnetic force or impulse voltages.
2. When operating the unit on voltages other than 240V,
set the AC voltage selector switch to 100V, 117V or
220V according to your local A C current. The voltage
selector switch is located on the rear panel of the unit.
When operating on 100V or 117V, remove the 0.3A
fuse and replace it with one rated at 0.7A.
3. Do not apply input voltages exceeding their maximum
ratings. The input voltage to the vertical amplifier is
up to 300V (DC + AC peak), the input for EXT TRIG is
up to 50V (DC + A C peak), and the input to Z A X I S is
up to 50V (DC + A C peak).
4. Do not increase the brightness of the CRT un-
necessarily.
5. Do not leave the oscilloscope for a long period with
bright spot displayed on CRT. Reduce the brightness
and soften the focus.
6. For X - Y operation, use the PULL X 5 MAG switch in
the PUSH position. If it is set in the PULL position,
noise may appear in the waveform.
Fig. 37.
M A I N T E N A N C E AND A D J U S T M E N T
M A I N T E N A N C E
Removal of Case
1. Remove the 5 screws from the top, sides and bottom
of the case using a "cross" head screwdriver.
2. The chassis can then be readily removed from the
case.
Caution
Before removing the case, be sure to turn off the
power.
Note that a high voltage (2000V max) is present on the CRT
socket and the printed circuit board. Keep your hand,
screwdriver, etc. away from any part carrying a high voltage
after removal of the case.
Screws
Screws
Fig. 38. Removal of Case
26
Voltage selector
