GE Vivid 7 - Page 486

GE HEALTHCARE
DIRECTION FC091194, REVISION 11 VIVID 7 SERVICE MANUAL
5 - 140 Section 5-11 - Power Distribution
5-11-4-5 Outputs - FB200574
5-11-4-6 Fuses
• Output Power Protection Circuit with these functions:
- Protect probe and TX board if a failure make the voltage exceed limits
- Protect the power supply if there is a failure in probe or transmitter circuit
• A watch-dog disables the voltage (set it to zero Volt) if the;
- serial communication with the FEC-2 module stops
- nominal Power limit is exceeded
- maximum Power limit is exceeded
5-11-4-7 Jumpers and Dip-switches
None.
5-11-4-8 LEDs
None.
5-11-4-9 Power Loss
A power loss may be due to:
• The Mains Switch has been switched to OFF
• The Mains cable has been disconnected
• Brown-out
If a power loss occur, all AC power distribution within the unit is lost. The Front-End Card Rack stops
functioning, the peripherals and the monitor also looses its power.
On units with an internal UPS, the Back-End Processor automatically switch over to the internal battery,
and the Back-End Processor starts an automatic power down sequence.
Table 5-92 Output Voltages, Plug P2
OUTPUT DESCRIPTION CONNECTED TO:
TSV1
TX Voltage 1
Voltage can be programmed to vary from +/- 2.5 V to +/- 80V
Used to drive the transmitters in 2D Mode and M mode
TX board
TSV2
TX voltage 2
Voltage can be programmed to vary from +/- 2,5 V to +/- 40V
Used to drive the transmitters in Doppler (CW/PW) mode
and in Color Flow Mapping (CFM) mode
TX board
PMXVOUT
Probe Multiplexing Voltage
A fixed +/-100 V Voltage
Used for the multiplexers in linear array probes with more
than 128 transducer elements
RLY board