Service manual

Neurodiagnostic Instruments Service Manual
3 - 52 Revision 2/18/05
Stimulus Probe
Stimulus Pod 1 will accept one stimulus probe. Either
the
S-402 or S-403 Stimulus Probe may be used, however
the system supports only the Console mode of
operation. The probe is controlled through the MC-4
Control Panel or slide controls in software.
Testing
The USBDiagnostics for the Endeavor CR are the
primary tool for testing and troubleshooting the
electrical stimulator functional units. Refer to Chapter 6:
Troubleshooting for detailed instructions on using the
diagnostics.
VikingQuest Electrical Stimulator
System
The electrical stimulator functional units are:
• VikingQuest Base Unit/Control Panel
• Electrical Stimulator Probe
• Stimulator 2 Module
Stimulus Generator/Control Panel
The circuits responsible for producing the isolated
electrical stimulus pulse reside on the VikingQuest base
board, within the Base Unit. The electrical stimulus
circuit is capable of delivering a constant voltage level
of 1 to 400V, or a constant current level of .1 to 100mA,
up to a maximum pulse duration of 1msec.
The VikingQuest Base Unit provides one channel of
isolated electrical stimulus directly to a stimulus probe,
and provides a connector for an optional second
channel.
The potentiometer on the left side of the VikingQuest
Control Panel controls the EMG sound level. The right-
hand potentiometer controls the electrical stim level in
Console mode. If a protocol uses two electrical
stimulators, stimulus 1 will be controlled remotely, and
stimulus 2 can be controlled from the base.
SM403 Stimulus Probe
SM-402 Stimulus Probe
Elec. Stim 1 Out
Elec. Stim 2 Connector
VQ Base Rear Panel
EMG Sound
Electrical
VikingQuest Control Panel
Level
Stim Level