Mindray DC-25, Руководство по обслуживанию

Страница: 56 / 213

4-2 Hardware Principle

Probe Connected Assembly

Main board

IO Interface board

IO Rear board

ECG board

4D drive board
4.2.1 Probe Board
High-voltage
switch
Relay
CPLD
Socket A
(96 pin)
Relay drive
circuit
Socket B
(96 pin)
POUTA[80:1]
POUTB[80:1]
RELAY_EN
BOARD_ID[7:0]
POUT[80:1]
drive
BOARD ID
RELAY_PWR_EN
PRB_B_ID[6:1]
PRB_A_ID[6:1]
VDD
Relay
High-
voltage
control
signal
+5V
+95V
-95V
Probe board
control signal
LC
LDO
D+3V3
A+5V
A+95V
A-95V
PRB_B_ON
VDD
Drive
Drive
Drive
Drive
PRB_A_ON
OE_N
PRB_A_ID[6:1]
OE_N
PRB_B_ID[6:1]
PRB_B_ON
PRB_A_ON
Socket C
(96 pin)
POUTC[80:1]
PRB_C_ID[6:1]
PRB_C_ON
VDD
Drive
Drive
OE_N
PRB_C_ID[6:1]
PRB_C_ON
EMIT[32:1]
DC-N2 series probe board
Power supply
Communication & control
Ultrasonic signal
+5V
Figure 4
-
2 Principle Diagram of the Probe Board
The function of the probe board is described as follows:

The ultrasonic signal is transferred from 32 channels to 80-array by the
high-voltage switch on the probe board.

Probe information could be obtained by probe board with reading probe online
signal and probe ID.

The system support three 80-array probes, and only one probe could be chosen
to work by relay switching on the probe board.
4.2.2 Probe Connected Assembly
Connect the main board and the probe board via the Probe connected assembly,
which provides only signal transfer function without any signal processing procedures.