LIFEPAK 15 Monitor/Defibrillator
Service Manual
Device Description
Functional Descriptions
84
3
Contact PCB (A07)
Interfaces the Li-ion battery edge connector with the device and provides I2C communication to and from the battery. In addition,
the device uses a battery pull signal to indicate when the battery is being removed.
Backlight PCB (A08)
A printed circuit board that contains the circuitry to light the A11 LCD assembly screen.
Printer Control Keypad (A09)/Main Keypad (A10)
Common device controls (those not available using the
SPEED DIAL
) are initiated through either the A09 printer control keypad or
the A10 main keypad. The number of buttons on these keypads varies, depending on the features installed in a specific device. All
buttons, with the exception of
ON
and
SHOCK,
are addressed by the user controls section of the A01 System PCB ASIC.
•
The
ON
button remains separate from the addressed buttons because it is needed to activate and deactivate the device without
ASIC interaction. Closures of the
ON
button are applied to the A03 Power PCB On/Off control block.
•
The
SHOCK
button remains separate from the addressed buttons as a matter of fail-safe design, thus preventing inappropriate
activation under conditions of loss of CPU control. Operator-initiated closures of the
SHOCK
button are applied in two places:
the A01 System PCB ASIC and the A04 Therapy PCB defibrillator processor. The ultimate shock decision rests with both the
ASIC and defibrillator processor agreeing to deliver defibrillation energy.
LCD Assembly (A11)
A backlit, 640 × 480 pixel, color LCD that displays the primary and secondary ECG waveforms and text messages.
Printer Assembly (A12)
The 100-mm printer is installed to support 12-lead ECG monitoring and printing of multiple displayed waveforms.