Tektronix TAS 475 Service Manual

Troubleshooting
Symptom Matrix
The Symptom Matrix (Table 6-5) is an aid in determining which modules to
•
troubleshoot. There is no separate troubleshooting procedure for the power
supply, since each module troubleshooting procedure includes checks of
the power
supply. The CRT is checked in the display control and display
driver troubleshooting procedures.
The. indicates the troubleshooting procedure most likely to locate the
failed module. The 0 indicates additional troubleshooting procedures that
may
help located the failed module.
Table 6-5:
Symptom Matrix
Symptom Processor
Analog Display
Front Display
Driver Panel
Control
Display Problems
No
display at all
0
0 0 0
•
Traces or readout, but not both
0
•
0
0
Abnormal readout
•
0
Abnormal traces
0
•
Abnormal traces and readout
0 0
•
Power-on diagnostics indicates a failure
• •
0
•
Self-calibration does not pass
0
•
Volts/Div and Sec/Div controls
One control works but not both
0
•
0
Neither control works
0 0
•
No control of Volts/Div or vertical position of a
0
•
single channel
No control of Volts/Div or vertical position of
0
0
•
any channels
Intensity Control Problems
No control of readout and trace intensity
0
0
•
Control of readout or trace intensity but
•
0
not both
Focus Problems
No control of focus
0
•
Unable to focus properly
•
0
No control of trace rotation
•
No control of scale illumination
•
•
6-40
Maintenance
Scan by Zenith

Tektronix TAS 475 Specifications

General

Brand	Tektronix
Model	TAS 475
Category	Test Equipment
Language	English