Tektronix DSA8300, Руководство по обслуживанию

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Removal and Installation
Optical Front-End assembly.
You will need a T-15 driver. You will also need
a coaxial cable connector tool, item 12 in the Required Equipment table, to
disconnect the coaxial cables from the d-sub connectors on the Electrical
Front-End circuit board. (See Table 4-1.)
This circuit board and chassis are not customer-replaceable and cannot be ordered
from Tektronix. (See page 4-34,
Acquisition System .)
1. To access the Optical Front-End assembly, remove these assemblies:
Trim (all) (See page 4-9.)
Bottom cover (See page 4-10.)
Left and Right covers (See page 4-10.)
Time Base assembly (See page 4-37.)
Electrical Front-End assembly (See page 4-38.)
Disconnect the cable (Tektronix part number 174-4241-01) from J01 on
the Electrical Front-End board, allowing the clip that holds the cable to
remain in place.
CAUTION.
Do not remove the clip that holds the cable in place. To do so
can cause EMI issues.
2. To remove the Optical Front-End assembly:
a. Place the instrument upside-down on the work surface, with the rear of
the instrument facing you.
b. Read all of the instructions and cautions in the Acquisition System section.
(See page 4-34, Acquisition System .)
c. Remove parts as needed to access the cable or mechanical assembly that
you want to replace. (See Figure 5-6 on page 5-15.) (See Figure 5-9 on
page 5-18.)
3. To replace the Optical Front-End assembly: Reverse the steps. Be sure
to connect the front-panel screws properly. (See Figure 4-17.) Refer to the
cable connections table for information about where to connect cables. (See
Table 5-1.)
DSA8300 Digital Serial Analyzer and Modules Service Manual 4–39