Mindray DC-70T

Troubleshooting of Regular Malfunctions 13-9
13.6 Control Panel Failure
13.6.1 Related Modules or Boards
No.
Description
Remarks
1
Control panel assembly
/
13.6.2 Key Points Supporting Troubleshooting
No.
Key Points Supporting Troubleshooting
Remarks
1
Backlight of the control panel
Confirm whether the control panel is powered on
normally;
2
Key sound of the control panel.
Confirm whether the buzzer works normally
3
Response to general function keys on
control panel.
/
4
Response to general key on numeric
key board.
Confirm whether it is numeric keyboard error or
PCBA error.
5
Response to trackball operation
/
6
Response to the sliding potentiometer
Confirm whether the error of a single sliding
potentiometer or the control panel PCBA is
corrupted.
7
Response to each encoder
Confirm whether the error of a single encoder or
the control panel PCBA is corrupted.
8
Self test for control panel test
Available to error diagnosis.
13.6.3 Troubleshooting of Control Panel
No.
Fault Description
Cause Analysis
Solution
1
Buzzer alarming
Key blocked;
Check the control panel for
key block.
2
Some or a certain key fails
Errors on key board PCBA or
silicon keys.
Replace key board PCBA or
silicon keys.
3
Some or a certain key on
the small keyboard fails.
Small keyboard assembly
Small keyboard assembly
4
Trackball failed or
abnormal
Dirt or obstacles jam in the
trackball groove.
Open and clean the groove
Improper settings of trackball
speed in system preset;
Preset the system
Degenerated trackball
performance
Replace the trackball