•
Troubleshooting
Procedure
• Equipment
•
Troubleshooting
This sUbsection contains information and procedures designed
to
help you
isolate problems to a faulty module
in
the oscilloscope. If a module needs to
be removed for repair or
replacement, follow the Removal
and
Installation
Procedures located
in
this section.
If the oscilloscope does not perform correctly, note each symptom or failure.
Next, refer to the Symptom Matrix Table (Table 6-5). Locate the symptoms
that most
closely resemble the symptoms you noted. If there are multiple
symptoms, use a process of elimination to reduce the number of possible
faulty modules. Identify possible faulty modules,
then perform the trouble-
shooting procedure/s indicated.
The cabinet must be removed to gain access to the
modules for measuring
signals and voltages. Refer
to
the Removal
and
Installation Procedures
beginning on page 6-9 for instructions to remove the cabinet.
Table 6-4 list the equipment is required to perform the troubleshooting
procedures.
Table 6-4: Equipment Required
for
Troubleshooting
Equipment
Example
Test Oscilloscope Tektronix
TAS
465
Digital Multimeter (DMM) Tektronix DM250
High
Voltage Probe
Fluke
Mode180K-40
High voltages are present when the cabinet
is
removed. Do not remove the
high
voltage shield from the
A3
Display Driver board unless it is necessary to
measure the high
Voltage. Do not perform this procedure without the pres-
ence
of
another person who
is
cable
of
providing aid .
TAS 475 and TAS 485 Service Manual 6-39
To Next Page
Loading...
