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No. 2D730-148E*O
(4)
Differences in the PWBs in the PV series
APL10
Transducer
Interface
1
(TI board)
Transmit Receive
(TR board)
3
Continuous
Beam former
1
(CB board)
Receive Control
(RC board)
1
Total
6 PWBs
PV8000
SSA-390A
PBCNN260
3
HVSW PWB
6
ECHOCNN
PBSEL BOX
2
PBSELMB
1
PBCONT
1
PULSER
4
CW RECEIVER
1
DBF
8
T&R-CONT
1
RPG
1
Total
PBSELBOX + 15 PWBs
Major differences
A 360-pin transducer connector is used
(not compatible with PV7000).
A relay for switching the transducer
is
used.
High-density
PWB
The line voltage can be switched
between two values for every rate in the
dual pulser.
High-density
PWB (64 chs per PWB)
A total of 192-ch signals can be
transmitted
and received simultaneously
with the three PWBs.
Elimination of the granddaughter
board.
Reduction of mirror artifacts
The 192 chs x four beams can be
received in the 12 beamformer
ASICs.
160-MHz crystal oscillator
High-density
PWB (nine + one)
(5)
Calibration and tests required when the board is repaired/replaced
The outlines of repair and replacement
of the board are described below.
For details, refer to
the service manual (maintenance
volume:
2D730-149E).
(a)
When the TI board is replaced
Calibration is not required.
Execute the test program from the service menu and
confirm that no errors occur.
(b)
When the TR/RC/CB board is replaced
The calibrations given below are required.
For the procedure for each calibration, refer
to the service manual (maintenance
volume).
After calibration, execute the test
program from the service menu and confirm that no errors occur.
l
ADC offset calibration
:
Required when the TR, RC, or HDD board is
replaced
l
SCW TX power calibration
:
Required when the TR board, RC board, or
power-supply
unit (PSA) is replaced.
4-3
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