Mindray DC-68, Service Manual

Page: 264 / 281

C-6 Description of Self Test Items
AFE clip 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 , which indicates the logic
error of DSP FPGA occurs . It is necessary to restore the device (OS+doppler) if Error re-appears.
It is recommended to change TRA board if the test result is FAIL .
C.1.14 Z0404 TRA Transmission and Reception Function
Test

Top test item
TRA AFE test mode

Test content
Test the coherence of 64 channels in transmitting and receiving: one channel transmits 2 V 1 M
PHV1 waveform each time, and analyzes whether the waveform is PHV1, and compares the
signal-to-noise ratio of this channel with others’.

Analysis to test failure
The drive goes wrong if the test result appears Error .
The waveform that the channel transmits is incorrect if the information “Open circuit of transmitting
and receiving channel: XXX” appears.
The transmission of this channel affects other channels if the information “Short circuit of
transmitting and receiving channel” 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 TRA board if the test result is FAIL .
C.1.15 Z0405 DSP FPGA and TRA Interconnection Test
(Data Interface)

Top test item
DSP FPGA and TRA FPGA communication self test (control interface)

Test content
Test whether XCVER data interface between TRA FPGA on the main board and DSP FPGA works
well.

Analysis to test failure
The drive goes wrong if the test result appears Error .
XCVER data interface on the connection of TRA FPGA-DSP FPGA 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 TRA board if the test result is FAIL .