working surfaces etc.).
HV POWER SUPPLY MODULE
B)
To ensure the heat flow between the electronic components and the
dissipator, always place a thin layer of thermo-conductive grease
THE HV POWER SUPPLY is used to ensure operation of the switching
(e.g. COMPOUND GREASIL MS12) between the contact zones.
power supply (the circuit on the primary board supplying auxiliary
C)
The power resistors (should they require replacement) should
voltages), even when the machine is operating at low voltage.
always be soldered at least 3 mm above the board.
It can be easily assembled by referring to the electrical diagrams in
D)
If silicone is removed from some points on the boards, it should be
figure A and using the following components:
re-applied. N.B. Use only non-conducting neutral or oximic
reticulating silicones (e.g. DOW CORNING 7093). Otherwise,
T1 = insulation transformer 230-230V 50VA(*)
silicone that is placed in contact with points at different potential
D1 = rectifier bridge 36MB 80 (cod. 112357)
(IGBT rheophores etc.) should be left to reticulate before the
C1 = electrolytic capacitor 470uF 400V ALL
machine is tested.
(cod.112514)
E)
When the semi-conductor devices are soldered the maximum
R1 = resistor 10 ohm 5W 5%
temperature limits should be respected (normally 300°C for no
R2 = resistor 100K ohm 2W 5%
more than 10 seconds).
F1 = delayed action fuse 1.5 A Fuse holder 5X20mm
F)
It is essential to take the greatest care at each disassembly and
Female red and black faston
assembly stage for the various machine parts.
Plastic box.
G)
Take care to keep the small parts and other pieces that are
dismantled from the machine so as to be able to position them in the
reverse order when re-assembling. (Damaged parts should never
be left out but should be replaced, referring to the spare parts list
given at the end of this manual).
ELECTRICAL DIAGRAM FOR POWER SUPPLY (HV OUTPUT):
H)
The boards (repaired when necessary) and the wiring should never
be modified without prior authorisation from Telwin.
I)
For further information on the specifications and operation of the
machine, refer to the Instruction Manual.
J) WARNING!
When the machine is in operation there are
dangerously high voltages on its internal parts so do not touch the
boards when the machine is live.
THE INSULATION TRANSFORMER CAN BE REPLACED WITH TWO
TRANSFORMERS OF THE SAME POWER, CONNECTING THE
SECONDARIES ACCORDING TO THE FOLLOWING DIAGRAM:
1) Disassembling the machine
Every operation should be carried out in complete safety with the power
supply cable disconnected from the mains outlet.
A)
Undo the 8 screws fastening the 2 plastic covers (4 each) to the front
and back
(figure 1A)
.
B)
Undo the 8 screws fastening the top cover to the structure
(figure
1B)
.
C)
Slide out the top cover by pulling gently outwards
(figure 1B)
.
NOTE:
To test the machine at low voltage special testing wiring should
D)
Separate the base from the upper metallic structure by removing the
also be used so as to be able to force a number of alarm signals
4 screws fastening the one to the other and disconnecting (from the
between the primary and control boards.
primary board) the 3 fastons R,S,T (J3,J4,J5) connecting the main
This wiring is supplied with the HV power supply (or it can be obtained
power supply switch
(figures 2A and 2B)
.
on request from Telwin: wiring KIT code 902760), or it can be easily
E)
Slide out the whole upper assembly (the structure anchoring the
assembled referring to the electrical diagram in
figure B:
various boards) by rotating gently upwards from the back and place
it on the work bench
(figure 3)
.
F)
Place the assembled base near the upper assembly and reconnect
the 3 fastons R,S,T so that the machine is able to operate
(figure 4)
.
After completing the repairs, proceed in reverse order to re-assemble
the machine and fasten down the top cover and plastic covers.
2) Cleaning the inside of the machine
Using compressed air, carefully clean the components of the power
Connector to be
Connector to be
source since dirt is a danger to parts subject to high voltages and can
fitted into
fitted into
control card
primary card
damage the galvanic separation between the primary and secondary
boards. It is important to take special care when cleaning the following
parts:
Air extraction fan attached to front (figure 2A):
check whether dirt has damaged the correct rotation of the blades, if
there is still damage after cleaning replace the fan.
Air inlet fan attached to back (figure 2B):
check whether dirt has damaged the correct rotation of the blades, if
there is still damage after cleaning replace the fan.
GENERAL REPAIR INSTRUCTIONS
Primary board (figure 3):
The following is a list of practical rules which must be strictly adhered to
A)
Rheophores of IGBT's Q3, Q4, Q5, Q12, Q13, Q14.
if repairs are to be carried out correctly.
B)
Rheophores of recirculating diodes D7, D24.
A)
When handling the active electronic components, the IGBT's and
C)
Rheophores of snubber network diodes D4, D27.
Power DIODES in particular, take elementary antistatic
D)
Black box connection zone (it contains the board to which the driver
precautions (use antistatic footwear and wrist straps, antistatic
T R O U B L E S H O O T I N G A N D
REMEDIES
10 5
F1
R1
R2
D1
T1
Figure A
Figure B
1
2
3
4
5
6
2
0.20 mm
SUPERIOR 240 CE
12
