Tektronix TekRanger 2 TFS3031, Service Manual

Page: 247 / 272

Maintenance
5–26
TFS3031 TekRanger/TekRanger 2 Service Manual
Troubleshooting
This section explains how to resolve problem messages that may be displayed by
the TFS3031.
Static-Sensitive Components
CAUTION. All modules in the TFS3031 contain components that are sensitive to
electrostatic discharge (ESD)
When servicing the TFS3031, work only at a static-free work station, and
practice standard anti-static handling procedures.
No Power-On
If the TFS3031 will not power on properly, the most likely cause is a discharged
battery, faulty battery, or faulty Power Supply or DC/AC Converter board.
Typical indications of a power problem are:
H
Low-battery warning message on screen.
H
Random, horizontal lines across a black screen.
H
Low backlight.
H
Blank or dim display.
To solve a power problem, first try to recharge the battery or power the TFS3031
with the power/charger adapter alone. If the power problem persists, replace in
order the:
1. Battery
2. Power/charger adapter
3. Power Supply board
4. DC/AC Converter board
If the TFS3031 will not power on when the battery is fully charged, disconnect
the battery cable. Then wait for 1 minute, reconnect the battery cable, and
power-on the instrument.