Tektronix SPG300, Service Manual, Page: 104 / 176

Maintenance
6-2
SPG600 & SPG300 Sync Pulse Generators Service Manual
Preparation
Before servicing this product, read the General Safety Summary , Service Safety
Summary , and Introduction at the front of the manual.
This system contains electrical componets that are susceptible to damage from
static discharge. Observe the standard precautions to avoid damaging
static-sensitive devices.
Inspection and Cleaning
Inspection and Cleaning describes how to inspect for dirt and damage. It also
describes how to clean the exterior and interior of the sync pulse generator.
Inspection and cleaning are done as preventive maintenance. Preventive
maintenance, when done regularly, may prevent sync pulse generator malfunction
and enhance its reliability.
Preventive maintenance consists of visually inspecting and cleaning the sync pulse
generator and using general care when operating it.
How often preventive maintenance should be performed depends on the severity of
the environment in which the sync pulse generator is used. A proper time to
perform preventive maintenance is just before sync pulse generator adjustment.
General Care
The top cover helps keep dust out of the sync pulse generator, and is needed to meet
EMI and cooling requirements. The top cover should be in place when operating
the sync pulse generator.
Inspection and Cleaning
Procedures
Inspect and clean the sync pulse generator as often as operating conditions require.
The collection of dirt on components inside can cause them to overheat and
breakdown. (Dirt acts like an insulating blanket, preventing efficient heat
dissipation.) Dirt also provides an electrical conduction path that could cause a
sync pulse generator failure, especially under high-humidity conditions.
CAUTION. To prevent damage from static discharge, service the product only in a
static-free environment. Observe standard handling precautions for static-sensitive
devices while maintaining this product. Always wear a grounded wrist strap,
grounded foot strap, and static resistant apparel.
CAUTION. Avoid the use of chemical cleaning agents that might damage the plastic
used in this sync pulse generator. Use only deionized water when cleaning the menu
buttons or front -panel buttons. Use an ethyl alcohol solution as a cleaner and rinse
with deionized water.