Troubleshooting of Regular Malfunctions 10-7
10.6.2 Key Points Supporting Troubleshooting
Key Points Supporting
Troubleshooting
Backlight of control panel
To confirm if the control panel is powered on normally;
Key sound of the control panel.
To confirm if the buzzer works normally
Response to function keys on
control panel
Response to trackball operation
Response to the sliding
potentiometer
To confirm if a single sliding potentiometer or the
control panel PCBA is damaged.
To confirm if a single encoder or the control panel
PCBA is damaged.
The buzzer alarms when a key is blocked for 100
seconds.
10.6.3 Troubleshooting
Check the control panel for
key block
Some or a certain key
failures
Silicon key damage; or
Control panel malfunction.
Try replacing silicon key or
control panel if no key blocks.
Trackball failed or
abnormal
Dirt or obstacles jam in the
trackball groove
Open and clean the groove
Improper setting of trackball
speed in system preset;
Degenerated trackball
performance
Replace the trackball module
All key of control panel are
normal,
Single encoder is failed.
Single encoder malfunction
Replace the encoder board
All key of control panel are
normal,
Single key of TGC is failed.
All keys of TGC are failed.
Control panel malfunction