Rigol DSG3000B Series, Service Manual, Page: 33 / 37

Chapter 2 Troubleshooting&Maintenance
RIGOL
DSG3000B Service Guide 2-1
Chapter 2 Troubleshooting&Maintenance
Basic Troubleshooting
The chapter lists the commonly encountered failures and their solutions. When you encounter those
problems, please solve them following the corresponding steps. If the problem remains still, please
contact
RIGOL
and provide your device information ( System
→
Information
→
System Info ).
1. The screen of the RF signal generator is still dark (no display) after pressing the
power key.
(1) Check whether the fan is running;
—
If the fan is running but the screen is dark, the screen connecting wire might be loose.
—
If the fan is not running and the instrument does not start successfully, please go to step
(2).
(2) Check whether the power is correctly connected and the power switch is really on.
(3) Check whether the fuse is burned out. If the fuse needs to be replaced, please use the
specified fuse (AC 250V, T2A).
(4) Restart the instrument after finishing the above inspections.
(5) If it still does not work correctly, please contact
RIGOL
.
2. The screen is too dark and cannot be seen clearly.
(1) Check whether the brightness setting of the LCD screen is too low.
(2) Press System
→
Display
→
Brightness and use the numeric keys or up/down arrow keys
to adjust the brightness of the LCD screen of the RF signal generator to a proper value.
3. The RF signal generator is locked.
(1) Check whether the RF signal generator is in remote control mode (in remote control,
is displayed in the status bar of the user interface). Pressing Esc can exit the remote control
mode and unlock the front panel.
(2) Check whether the RF signal generator is in local mode with the screen being locked (when
the screen is locked, front panel operations are not available). Pressing
Esc can unlock the
screen and exit the locking state.
(3) If progress bar is displayed on the screen of the signal generator, some operation is in
progress. For example, when saving a file, the progress bar will be displayed indicating that
the save operation is in progress. At this point, the front panel is locked.
(4) Pressing Preset or restarting the signal generator can also unlock the instrument.
4. The setting is correct but the waveform output is incorrect.
(1) There is no RF output.
—
Check whether the signal connecting cable is tightly connected to the corresponding [RF
OUTPUT 50Ω ] connector.
—
Check whether the connecting cable has internal damage.
—
Check whether the connecting cable is tightly connected to the test instrument.
—
Check whether the backlight of RF lights on. If not, press this key to illuminate the
backlight. At this point, the RF label is displayed in the status bar of the user interface
and the RF output is enabled.
—
Check whether the output amplitude of the RF signal is too small. Adjust the output
amplitude properly.
(2) The RF output is not modulated.
—
Check whether the signal connecting cable is tightly connected to the corresponding [RF
OUTPUT 50Ω ] connector.
—
Check whether the connecting cable has internal damage.
—
Check whether the connecting cable is tightly connected to the test instrument.