GW Instek GOS-652G - Manual (Page 35)

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5.MAINTENANCE
WARNING
The following instructions are for use by qualified personnel only. To avoid electrical shock, do not perform any servicing other
than in the operating instructions unless you are qualified to do so.
5.1 Fuse Replacement
If the fuse blows, the power lamp indicators will not light and the oscilloscope will not operate. The fuse should not normally
open unless a problem has developed in the unit. Try to determine and correct the cause of the blown fuse. The replace only with a fuse of
the correct rating and type(see page 7 )
The fuse is located on the rear panel (see fig. 4-2).
WARNING. For continued fire protection. Replace fuse only with 250V fuse of the specified type and rating, and
disconnect power cord before replacing fuse.
5.2 Line Voltage Conversion
The primary winding of the power transformer is tapped to permit operation from 100,120,220,or 230VAC 50/60Hz line voltage.
Conversion from one line voltage to another is done by changing the line voltage selector switch as shown in Fig. 4.2.
The rear panel identifies the line voltage to which the unit was factory set. To convert to a different line voltage, perform the
following procedure:
(1) Make sure the power cord is unplugged.
(2) Change the line voltage selector switch to the desired line voltage position.
(3) A change in line voltage may also require a corresponding change of fuse value. Install the correct fuse value as listed on
rear panel.
5.3 Cleaning
To clean the oscilloscope, use a soft cloth dampened in a solution of mild detergent and water. Do not spray cleaner directly
onto the oscilloscope because it may leak into the cabinet and cause damage.
Do not use chemicals containing benzine, benzene, toluene, xylene, acetone, or similar solvents.
Do not use abrasive cleaners on any portion of the oscilloscope.