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Service Information Phyaction 740 & 790-series
Page 1
CHAPTER 1
GENERAL
INFORMATION
1.1 Introduction
The Phyaction 796 is an appliance for ultrasound therapy, electrotherapy (1 channel medium frequency
or TENS), combination therapy (MF & US) and laser therapy. The Phyaction 792 is the same as the 796,
except that it can't support laser therapy. The Phyaction 793 is the same as the Phyaction 792, except it
also contains rectified currents for electrotherapy. The Phyaction 740 can only be used for laser therapy.
In this manual the Phyaction 796 is described because it is the most extensive model in the series and
the Phyaction 793 for the rectified currents.
In this chapter the important features from the users manual for service personnel are listed. In the next
chapter the theory of operation will be explained. In chapter 3 is described how service personnel can
check the operation of a 796 and in chapter 4 the adjustments which can be executed by service
personnel are explained. The next chapter contains information which could be very useful for trouble
shooting such as the description of the automatic self test and a list of the error numbers. The schematic
diagrams are in chapter 6, the spare parts list in chapter 7 and a list of all the modifications is in the last
chapter.
1.2 Safety
aspects
1.2.1 Electrical safety
The equipment can only be used in areas with provisions in accordance with current statutory
requirements. Pay particular attention to the use of protective earth, otherwise the patient leakage current
can rise above the permitted limit for type B equipment.
1.2.2 Explosion safety
The equipment is not suitable for use in areas where flammable gasses or vapours are present.
Therefore, remove the mains plug from the socket before the area in which the equipment is located is
disinfected, since some disinfection solutions evaporate and subsequently form an explosive mixture.
1.2.3 Operational safety
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Using the equipment in the vicinity of short wave or microwave equipment can influence the output
of the unit. Using this equipment when high frequency surgical equipment is connected to the patient
at the same time can result in burning under the electrodes.
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Patients who have electrical implants (i.e. pacemaker) may only be treated following medical
advice.
-
Laser beams are dangerous for the eyes. You must ensure that the laser beams do not reach the
eyes. In cases where the risk of laser beams reaching the eyes is increased, for example when the
patient is receiving treatment to the face, then he/she should wear safety glasses. Also, when you
are holding the probe at some distance from the skin and there is the possibility of the beam
reflecting into the eyes, the patient and the therapist should wear glasses. For other treatment it is
advised to wear glasses.
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The equipment is not suitable for use in damp areas.
Summary of Contents for Phyaction 740 Series
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