Service manual

Revision 2/18/05 2 - 13
System Overview
Base Unit
The Base Unit contains a majority of the electronics for
the Endeavor CR. This includes:
• Isolated power supply
• Stimulus/trigger pulse generator
• Electrical stimulus generator
• Auditory stimulus generator
• EMG speaker
The Base Unit is considered a Least Replaceable Unit
(LRU) and therefore contains no customer serviceable
parts.
The power supplies for the base unit and laptop
computer meet leakage current specifications for
medical devices, therefore no external isolation power
supply is required for portable systems.
Desktop systems require an isolated power supply.
Amplifier System
The amplifier system consists of a 16-Channel
Physiological Amplifier, two headboxes, and interface
cables. The 16-channel amplifier and headboxes are
Least Replaceable Units and contains no customer
serviceable parts.
16-Channel Amplifier
Headboxes
HB-1 and HB-2 headboxes are functionally identical,
except for the identifying labels. ID registers in each
headbox allow the system to distinguish HB-1 from
HB-2.
Endeavor CR Base Unit
16-Channel Amplifier
HB-1 & HB-2 Headboxes