Mindray DC-68, Service Manual

Page: 276 / 281

C-18 Description of Self Test Items
drive circuit and Cos- drive circuit. After being magnified, AD collects the signal to decide the
amplitude.

Analysis to test failure
The drive goes wrong if the test result appears Error .
The drive circuit goes wrong if the information “ The test of XXX drive circuit fails ” appears.

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 4D&TEE board if the test result is FAIL .
C.1.38
Z1303
4D&TEE Board Programmable Voltage Test

Top test item
Communication test between DSP FPGA and 4D&TEE board

Test content
Set programmable voltage PVPP, NVPP to output the related voltage (set 5 voltage points). After
being magnified, AD collects the voltage value to decide the amplitude.

Analysis to test failure
The drive goes wrong if the test result appears Error .
If the test appears FAIL, it shows the theoretic voltage values of PVPP and NVPP and the
collected voltage values. Decide which part of the power supply signal goes wrong.

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 4D&TEE board if the test result is FAIL .
C.1.39
Z1304
TEE Temperature Signal Test

Top test item
Communication test between DSP FPGA and 4D&TEE board

Test content
Read the value of TEE temperature signal. The collecting of the TEE temperature works well if the
value keeps stable.

Analysis to test failure
The drive goes wrong if the test result appears Error .
The interconnection of TEE temperature signal goes wrong if the test appears 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 4D&TEE board if the test result is FAIL .
C.1.40
Z1305
TEE Angel Signal Test

Top test item
Communication test between DSP FPGA and 4D&TEE board