Troubleshooting; The Power Source Does Not Start, Lcd Display (N) Off - Cebora PLASMA SOUND PC 70/T Manual De Servicio

CEBORA S.p.A.

3.3 - Troubleshooting.

ANY INTERNAL INSPECTION OR REPAIR MUST BE CARRIED OUT BY QUALIFIED
BEFORE REMOVING THE PROTECTIVE GUARDS AND ACCESSING INTERNAL
PARTS, DISCONNECT THE POWER SOURCE FROM THE MAINS AND WAIT FOR
THE INTERNAL CAPACITORS TO DISCHARGE (1 MINUTE).
Items in boldface describe problems that may affect the machine (symptoms).
Operations preceded by this symbol refer to situations where the operator must take

action to determine (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, LCD display (N) off.

MAINS OK TEST.
No voltage at the power source input due to tripped mains protection.

♦ Eliminate any short-circuits on the connections between power cord, switch (10)
and filter board (7).
♦ Check that terminals U2, V2 and W2 of the filter board (7) are not short-circuited
with one another or to earth. If short-circuited, disconnect the wires leading from
terminals U1, V1 and W1 of the filter board (7) and from terminals of the bridge
rectifier (41) and repeat checks. If the short circuit is still present, replace filter
board (7). If the short-circuit is eliminated, check that bridge rectifier (41), IGBTs
(30) and IGBT board (31) are intact and replace any defective components.
♦ Mains not OK to supply power source (e.g. Insufficient installed power)
3302341
WARNINGS
PERSONNEL.
NOTE
Go to MAINS CONNECTION TEST.
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10/07/2019