• If any circuit board is repaired or replaced, you must perform the Performance Verification procedure in the specifications and
performance verification manual, which was provided with your instrument. This manual is also available at www.tektronix.com/
manuals, by searching for your product name. If the instrument fails the Performance Verification tests, it must be returned to a
Tektronix Service Center for repair and calibration.
CAUTION: To prevent damage from electrical arcing, ensure that circuit boards and components are dry before applying power to
the instrument.
Table 2: Internal inspection checklist
Item Inspect for Repair action
Circuit boards Loose, broken, or corroded solder
connections. Burned circuit boards. Burned,
broken, or cracked circuit-run plating.
Remove and replace damaged circuit board.
Resistors Burned, cracked, broken, blistered condition.
Capacitors Damaged or leaking cases. Corroded solder
on leads or terminals.
Wiring and cables Loose plugs or connectors. Burned, broken,
or frayed wiring.
Firmly seat connectors. Replace defective
cables.
Chassis Dents, deformations, and damaged
hardware.
Straighten, repair, or replace defective
hardware.
Lubrication
There is no periodic lubrication required for this instrument.
Returning the instrument for service
When repacking the instrument for shipment, use the original packaging. If the packaging is unavailable or unfit for use, contact your local
Tektronix representative to obtain new packaging.
Seal the shipping carton with an industrial stapler or strapping tape.
Before returning the instrument for service, contact the Service Center to get an RMA (return material authorization) number, and any
return or shipping information you may need.
If the instrument is being shipped to a Tektronix Service Center, enclose the following information:
• The RMA number.
• The owner's address.
• Name and phone number of a contact person.
• Type and serial number of the instrument.
• Reason for returning.
• A complete description of the required service.
Mark the address of the Tektronix Service Center and the return address on the shipping carton in two prominent locations.
Remove and replace procedures
This section contains procedures for removal and installation of replaceable modules in the instrument. Refer to Replaceable parts
on page 23 for lists and exploded views of replaceable modules.
Maintenance
3 Series MDO Mixed Domain Oscilloscope Service Manual 7
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