LIFEPAK 15 Monitor/Defibrillator
Service Manual
Device Description
Functional Descriptions
83
3
LED driver
Most device LEDs (located on the A10 main keypad) receive their drive from a serial-to-parallel converter located on the A05
Interface PCB. The Service LED drive originates from the A01 System PCB ASIC. The
CHARGE
and Power
ON
LEDs receive
their drive from the A03 Power PCB Power Processor.
Keypad row driver
The A01 System PCB ASIC reads device control buttons using a row and column address scheme (that is, each button
resides at a unique row and column address). Data from the ASIC shifts serially into the A05 Interface PCB Keypad Row
Driver (a serial-to-parallel converter) for application to button rows in the A09 printer control keypad and A10 main keypad.
A button closure enables row drive for a unique button to be sensed at the keypad column receiver.
Keypad column receiver
The A01 System PCB ASIC reads button closures serially from the Interface keypad column receiver (a parallel-to-serial
converter). In practice, closure of a device button passes row drive for that button to one, and only one, column receiver
input.
LCD backlight converter
The A05 Interface PCB applies filtered SW_VB through a Boost Converter to apply a minimum of 9.6 V to the A08 Backlight
PCB when it receives an enable signal (LCD_BL_ON) from the A01 System PCB display controller. A separate backlight
power supply is mounted on a metal bracket in the front case.
Bluetooth Radio
Bluetooth radio is integrated onto the Interface PCB. You can transmit current and archived data from the LIFEPAK 15
device to the LIFENET
®
System or to post-event review products such as CODE-STAT™ or DT EXPRESS™ software.
OEM PCB (A06)
A PCB used to integrate monitoring modes supplied to Physio-Control by third parties, or original equipment manufacturers
(OEMs), into the device system architecture. The A06 OEM PCB provides isolated power supplies, safety isolation, transient
protection, and signal interface adapters to support hosted OEM modules.
