Mindray DC-68, Service Manual

Page: 273 / 281

Description of Self Test Items C-15

Test content
Test whether I2C communication serial port between MF FPGA and secondary LCD works well.
The test generates secondary LCD’s saver, and then returns back. Secondary LCD’s brightness
decreases, and then returns back. Read the hardware and software versions of secondary LCD.

Analysis to test failure
The drive goes wrong if the test result appears Error .
The interconnection between MF FPGA and secondary LCD goes wrong if the test result is FAIL .

Suggestion to failure test
Restart the device to perform the self test if the test result appears Error. It is necessary to restore
the device (OS+doppler) if Error re-appears.
Check whether the connecting material between secondary LCD and main unit is fixed well, and
then replace main monitor if the test result is FAIL .
C.1.33
Z1002
Secondary LCD Monitor Brightness Control
Test

Top test item
I2C communication test of secondary LCD monitor

Test content
The dialog box appears when performing the test. The program controls the brightness of
secondary LCD monitor via 12C interface. The brightness goes down to the lowest, and then goes
up to the highest, then gets back to normal. If backlight changes, click “Yes, I Can”, otherwise click
“No, I Can’t”. If the user clicks “Retry” the system will repeat the procedure mentioned above.

Analysis to test failure
The drive goes wrong if the test result appears
Error
.
Brightness control of secondary LCD monitor goes wrong if the test result is FAIL .

Suggestion to failure test
Restart the device to perform the self test if the test result appears Error. It is necessary to restore
the device (OS+doppler) if Error re-appears.
It is recommended to replace secondary LCD monitor if the test result is FAIL .