uniphy Phyaction V User manual

Service manual Phyaction V
Service manual version 0.1 Page 1
1. Contents
1. ............................................................................................................................. 1Contents
2. ............................................................................................................................... 2Preface
3. .............................................................................................................. 3Important remarks
3.1 ................................................................................................................ 3Safety aspects
3.2 .............................................................................................................. 3Data registration
4. .................................................................................................................... 5Technical data
4.1 .................................................................................................... 5General technical data
4.2 ................................................................................................ 5Environmental conditions
4.3 .................................................................................................... 5Transport and storage
5. ............................................................................................................... 6Circuit description
5.1 .................................................................................................................. 6Power supply
5.2 .................................................................................................. 6Patient Current Routing
5.3 ........................................................................................................................... 6Vacuum
5.3.1 ............................................................................................................ 6Control Loop
5.3.2 ........................................................................................................ 6Pulsed Vacuum
5.3.3 ..................................................................................................... 7End of Treatment
5.3.4 ................................................................................................. 7Water management
6. ............................................................................ 8Safety inspection list ( yearly check-up )
7. ................................................................................................................. 9Hardware labels.
7.1 ....................................................................................... 9Upgrading the hardware code.
8. ................................................................................................. 10Replacement procedures
8.1 ............................................................................................................ 10Opening the unit
8.2 .............................................................................. 11Replacement of power supply PCB
8.3 ..................................................................................... 11Replacement of the Main PCB
9. .......................................................................................................................... 12Upgrades
9.1 .................... 12Vacuum pump switches of after 2 minutes even when current is flowing
10. .................................................................................................................. 13Spare parts list
11. ............................................................................................. 13Schematics and PCB layout

Service manual Phyaction V
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2. Preface
The Phyaction V is a Uniphy “low noise” vacuum unit with following characteristics :
Vacuum unit with 2 independent channels.
2 or 4 poles
Electronic vacuum control
Continuous and pulse mode
The Phyaction V unit can be connected to the following Gymna electrotherapy units :
Phyaction C
Phyaction E
Phyaction I
As a member of the Uniphy family it is built according to the requirements of the MDD security
standards. All functions of the unit are controlled by a microprocessor, ensuring a high degree
of reliability and safety.
This service manual gives a complete and accurate technical picture of the Phyaction V.
In doing so, it will hopefully help you to reach your goal: to form a correct diagnosis and to solve
the client’s problem as thoroughly as possible.
If you have any questions or if you need additional information about this manual or about the
use of the unit, please do not hesitate to contact us.

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3. Important remarks
3.1 Safety aspects
To understand and practice all procedures described in this manual a good technical
background is a must.
GymnaUniphy cannot be held responsible for any actions executed on the unit by unauthorised
persons, or for executing any procedures not prescribed in this manual.
All information in this manual has a GymnaUniphy nv. copyright.
3.2 Data registration
The distributor must be able to provide the following data for each unit:
Instrument data: Part and serial number.
Gymna has the original configuration of each unit.
The Phyaction V has following critical parts:
Ref 324597 : Main PCB Phyaction V
Ref 138103 : Pump Vaco 200
Ref 324826 : Power supply SMPS Vaco 200
All these parts have a serial-or batchnumber that has to be filed in case of a configuration
change :
Customer data: Name, full address and date of delivery.
Service activities: All service activities must be filed.
If any critical parts are changed, we also expect the distributor to file the new serial
numbers of these part(s).
To file this data, a data registration document is available on next page.

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Data registration document
Information
Distributor name Distributor address
Customer name Customer address
Instrument name: Serial number:
Date of delivery:
Service activities
Date:
Error complaint:
Service action
Critical spare parts exchange list
Critical part name Old serial number New serial number
Date:
Error complaint:
Service action
Critical spare parts exchange list
Critical part name Old serial number New serial number

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4. Technical data
This is a summary of the technical data as described in the user manual.
4.1 General technical data
Dimensions Phyaciton V (w x h x d) 267 x 95 x 270 mm
Weight Phyaciton V 3,5 kg
Weight including accessories 4,6 kg
Mains voltage 100 - 240 VAC, 50 - 60 Hz
Maximum power consumption 30 VA
Safety class Class I (earthed socket required)
Insulation Type BF (floating patient circuit)
Fuses 2 x T2AL250V
Volume water reservoir 180 ml
Working pressure continuous vacuum 38 - 320 hPa
Working pressure pulsation vacuum 58 - 480 hPa
Vacuum rhythm 1,5/1,5 - 1,5/4,5 s (on/off time)
4.2 Environmental conditions
Temperature: +10 °C to +40 °C
Relative humidity 30% to 75%
Atmospheric pressure 700 hPa to 1060 hPa
4.3 Transport and storage
Transport weight 6,5 kg
Storage temperature -20 °C to +60 °C
Relative humidity 10% to 100%, including condensation
Atmospheric pressure 200 hPa to 1060 hPa
Transport classification Single piece by mail

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5. Circuit description
5.1 Power supply
The device is mains powered. It sports an all-range off-line switched mode power supply ,
meaning it can be used all over the world without having to select a working voltage or
frequency. But of course the the plug of the power cord has to fit into the local outlet type.
5.2 Patient Current Routing
The electrotherapy outputs of the main unit are connected to the vacuum unit, at the rear, and
the electrodes are connected to the front of the vauum unit. As long as the vacuum is not used
the traditional electrodes function as before, even when the vacuum unit is not switched on.
As soon as the vacuum is turned on the patient current is switched from the traditional
electrodes to the connectors for the hoses at the other end of which the suction cups are. In the
hoses is a wire that feeds the patient current to a metal plate inside the cup. Contact with the
the skin of the patient is established by a moisturized sponge. The switchover always happens
for channel A but the operator can add channel B by pressing a button that toggles the choice
between traditional and vacuum electrodes.
5.3 Vacuum
When the vacuum control is turned up, air is pumped out to create the vacuum until the set
level is reached. The hose connectors limit the air flow into each hose so one can put the
vacuum electrodes one at a time in their place. When channel B is not used, its connectors
should be plugged by connecting them to each other by a hose, otherwise the pump keeps
running and deeper vacuum levels cannot be reached.
5.3.1 Control Loop
A pressure sensor measures the vacuum level and a control loop powers the pump if the set
level is deeper or opens a valve to let air in when lower . In continuous mode this results in only
the pump being run very lightly, making up up for the small air leakage between the cups and
the skin and at the connectors.
5.3.2 Pulsed Vacuum
When the electrodes are in place the operator can pulsate the vacuum to mitigate the effect
vacuum has on patients with a vulnerable skin. When pulsating, the vacuum is raised by 50%
during 1.5 second and then returns for 1.5 to 4.5 seconds to the level set for continuous
operation. As a result the pump will run during the 1.5 second period of deepened vacuum after
which the valve will be opened until the base level is reached again.

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5.3.3 End of Treatment
Prolonged exposure to the vacuum under the suction cups can lead to injuries, e.g. when the
patient is forgotten by the operator (actually has happened!). To prevent this, the unit senses
the patient current in both channels when the vacuum is turned up. To keep the patient circuits
floating this is done by optocouplers blocking a timer from running while the vacuum is switched
on. As soon as no current is flowing in both channels, this timer will start running and, on timing
out after a couple of minutes, switch off the vacuum. The yellow output indicator light(s) next to
the vacuum connectors will now flash until the vacuum control knob is turned back to zero.
5.3.4 Water management
Because the sponges in the vacuum cups must be moistened for conductivity, unavoidably
droplets are sucked into the system. These droplets do not only contain water but also fibers
from the sponges, flakes of skin and other substances present under the cups. To prevent
these to reach the pump and pollute it, the air crosses a water container first where the not
gaseous particles are percipitating. The now clean air is prcocessed by the pump and released
into the ambient through a silencer. After a while this container will get filled with water and if not
emptied, water would reach the pump and be sprayed out through the silencer. To prevent this
happening there is a level detector inside the water container. When too high a level is
detected, this is shown to the operator by a blinking light next to the ‘water container full’ symbol
on the front. A running session will not be ended by this situation but when trying to turn up the
vacuum from zero for a new treatment, nothing will happen. The operator first has to empty the
water conainer by detaching the hose at the rear side of the unit and letting out the water.

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6. Safety inspection list ( yearly check-up )
Customer identity
Unit:
Serial number:
Date:
Test 1: General inspection
Pass Fail N.A
.
Results of previous safety inspections are available
The user manual is present
The device label and suppliers label are clearly readable
The enclosure, the intensity controls, the keys and the display are
undamaged
Mains entry and power cord are undamaged
The output connectors are undamaged
The electrode connectors and cables are undamaged.
All the operation functions work
The measured output signals are correct
All the alarm functions work.
Remarks:
Test 2: electrical safety test according to VDE 0751
Parameter Measured Limit Comments Pass Fail
Protective earth resistance < 0.2 
Enclosure leakage current µA < 1000 µA
Patient leakage current µA < 5000 µA
The unit ……. With serial number …… has passed/failed the test
Name service engineer Signature

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7. Hardware labels.
Each PCB (except the display PCB and the power supply) has a label with the hardware code
which GymnaUniphy sticks on the PCB during production.
The main PCB consists of an eeprom in which the actual hardware code of the used PCB is
saved.
The hardware code consists of 4 characters and is composed as follows (from left to right):
0… From 1 to 9. Increase in case of a
principle technology change. Hardware is not compatible anymore.
All previous changes made in
hardware shall be inherited in
the new layout. The last 3
alphanumerical numbers will
begin with A
.A.. A to Z Increase in case of a
principle technology change. Components are not anymore compatible with the previous
layout. All previous changes
made in hardware shall be
inherited in the new layout. The
last 2 alphanumerical numbers
will begin with A
..A. A to Z Increase in case of
component change.
…A A to Z Increase in case of a PCB
track change.
Example:
Suppose that resistor R68 changes from 22 K to 100 K.
The actual hardware version 1AAA will be upgraded to 1ABA.
7.1 Upgrading the hardware code.
Every hard-or software change will be presented in a technical bulletin. In case of a hardware
change GymnaUniphy will provide the necessary components as well as a new hardware label.
This label must be put on the upgraded PCB.

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8. Replacement procedures
The most frequent service operations will be exchanging defective boards rather than repairing
them.
When handling static sensitive devices such as PC boards of the Phyaciton V, the following
precautions should be observed:
- Persons should be earthed by means of a wrist strap.
- Ground all electrical equipment, work bench, soldering iron…
This chapter will explain how to open the unit and remove the PCB’s for exchange.
8.1 Opening the unit
Step 1 : Remove the 2 bolt at the back of the unit
Step 2 : Take of the cover.