Cebora PLASMA PROF 80 - TROUBLESHOOTING; Power Source Does Not Start (LED V Off)

CEBORA S.p.A. 8
3.3
- Troubleshooting.
WARNINGS
ANY INTERNAL INSPECTIONS OR REPAIRS MUST BE CARRIED OUT BY QUALIFIED
PERSONNEL.
BEFORE REMOVING THE PROTECTIVE GUARDS AND ACCESSING INTERNAL
PARTS, DISCONNECT THE POWER SOURCE FROM THE MAINS.
NOTE
Items in boldface describe problems that may occur on the machine (
symptoms).
 Operations preceded by this symbol refer to situations that the operator must verify (causes).
♦ Operations preceded by this symbol refer to actions the operator must perform in order to
solve the problems (solutions).
3.3.1 - The power source does not start, led (V) off.
MAINS SUITABILITY TEST.
Correct?
 Missing voltage at the power source input due to tripped mains protections.
NO
YES
♦ Eliminate any short-circuits on the connections between power cable, switch (8),
transformer (50), terminals TP1, TP2, TP3 and TP6 of power board (20), J4 on
fuse board (18) and J3 on setting board (19).
♦ Check the insulation towards earth of the transformer (50), service transformer
(18) and fan (45). If leaking or short-circuited towards earth, replace.
♦ With the power source off, temporarily disconnect the wires of the transformer
(50) from terminals TP1, TP2, TP3 and TP6 of power board (20) and check the
resistance between the above terminals. Correct value = >Mohm in all
measurements. If short-circuited replace the power board (20).
♦ Mains not suitable to power the power source (ex.: insufficient installed power).
MAINS CONNECTION TEST.
Correct?
 Terminals TP1, TP2 and TP3 of power board (20) = approximately 3 X 170 Vac; terminals
TP1 and TP6 = 22 Vac approximately, with switch (8) closed.
YES
NO
♦ Check power cable and plug and replace if necessary.
♦ Check switch (8) and replace if defective.
♦ Check the conditions of the voltage change on the transformer (50). If you find
burnt or worn terminals replace them or replace the entire transformer (50).
♦ Check the mains voltage conditions, and especially that none of the three power
supply phases is missing.
♦ Replace the transformer (50).
3.302.167 25/06/04