GE Voluson i BT06, Service Manual

Page: 271 / 516

GE V
OLUSON
i / V
OLUSON
e
D
IRECTION
KTI106052, R
EVISION
10 S
ERVICE
M
ANUAL
Chapter 5 - Components and Functions (Theory) 5-39
5-6-2 Keyboard and Control Panel Components
5-6-2-1 Power ON/OFF Button
The Power On/Off button receives 3.3V from the BEP. Once shorted, this voltage is routed to the PMC
which will activate or perform the appropriate task, as required.
5-6-2-2 Lid ON/OFF Switch
The Lid On/Off switch is activated by a magnet located in the LCD frame (on the left side). Once the lid
of the system is closed completely, the magnet is positioned above the lid switch which causes the
contacts of the switch to short at 3.3V to the PMC. The 3.3V is generated by the BEP.
5-6-2-3 Alphanumeric Keyboard
The Voluson i / Voluson e alphanumeric keyboard, with a key arrangement similar to that of a laptop
keyboard.
The alphanumeric keyboard supports all standard alpha-numeric functionality, such as, auto-repeat,
standard ASCII output codes,
etc
.
Specially designed, high-quality key caps - together with controllable backlighting - provide a keyboard
that is comfortable and easy to use.
The upper row of functional keys (F1 - F11), are assigned to specific ultrasound functions.
5-6-2-4 TGC Sliders
There are six linear Time Gain Compensation (TGC) sliders located to the right of the alphanumeric
keyboard (refer to Figure 5-13 on page 5-38 ). These keys, that slide horizontally, are used to
compensate for depth-related attenuation in an image.