Covidien Valleylab LS10 Service Manual page 63

Functional Overview
Display PCB
The display PCBA is visible through the front of the generator. All of the tri-color LEDs
used on the display PCBA have red, green, and blue LEDs in them. Each of the red, green,
and blue LEDs can be turned on or off independently. This allows each location to display
seven different colors as well as being off.
In the center of the front panel there is a circle with 12 tri-color LEDs. In the center of this
circle is a smaller circle with white LEDs. The outer circle of LEDs shows the progress of a
seal cycle by lighting the LEDs sequentially around the circle, similar to a clock face.
Different colors are used to indicate error conditions. The center white LEDs are used as a
reusable instrument status indicator.
To the left side of the front panel is a triangle with an exclamation point in it. This
triangle is lit by red LEDs. When lit it indicates an error condition.
Above the LigaSure receptacle is a single tri-color LED. It indicates when an instrument is
inserted and is recognized by the generator.
Power Button
The power button is on the far left of the front panel. When the power button is pressed
for approximately 3 seconds the generator will turn off. A short press of the button will
turn the generator on.
Insertion Detection
A part of the LigaSure receptacle contains a switch that is activated whenever an
instrument is inserted into the LigaSure receptacle. This insertion is detected by the Host
processor. The Host processor then determines the type of instrument that was inserted
by using the barcode and RFID module.
Since the insertion detection switch is located near the RF energy signals in the LigaSure
receptacle, the switch detection circuitry is isolated from the Host processor. These
detection signals cross the isolation boundary via a high voltage isolation module.
Barcode/RFID Module
The Barcode/RFID (Vibe) module is a single assembly containing both a Barcode (Aztec)
scanner and a RFID scanner. It is responsible for detecting LigaSure Device type. The Host
processor communicates with the Barcode/RFID module bi-directionally over an RS-422
link. The Host processor can request the Barcode/RFID module to read a barcode, read an
RFID, or to write an RFID. Both the barcode and the RFID contain information about the
instrument.
Instrument Handswitch
The Host processor needs to detect the activation of a hand switch on an instrument.
Since the hand switch is connected to the RF energy signals in the instrument, the switch
detection circuitry is isolated from the Host processor. These detection signals cross the
isolation boundary via a high voltage isolation module.
Valleylab LS10, LS Series Single Channel Vessel Sealing Generator Service Manual 4-5