Cebora KINGSTAR 400TS Manual De Servicio página 87

CEBORA S.p.A.
□ With the power source off, temporarily disconnect J22 from microswitch board (37)
and check the resistance at terminals 3 - 4 of J22. Correct value = 12 ohm
approximately for Item No 372 and 9.3 ohm approximately for Item No 374.
TESTING POWER SUPPLY OF CURRENT TRANSDUCER (25)
□ Current transducer (25), terminals +(+) and -(-) = +30 Vdc, approximately.
♦ With the power source off, temporarily disconnect the connector
TESTING CURRENT TRANSDUCER (25)
□ With the power source off, reconnect the connector to current transducer (25),
temporarily disconnect J22 from the microswitch board (37) and check the resistance
between terminals 6 – 8 of the floating connector disconnected from J22. Correct
value = 5000 ohm approximately for Item No 372 and 1500 ohm approximately for
Item No 374. If =0 ohm, replace current transducer (25).
TESTING CURRENT TO THE SECONDARY WINDING OF TRANSFORMER (53)
□ Micro board (37), connector J22, terminals 7(+) - 4(-) = +360 mVdc, +/- 10 mVdc,
(with power source on and no load).
3301045
YES
from current transducer (25). Power up the power source again
and check the voltage on J22 of microswitch board (37), terminals
6(+) - 4(-)= +15 Vdc; terminals 8(+) - 4(-)= -15 Vdc. If not correct,
replace microswitch board (37).
YES
Check the wiring between diode assembly (27), and the power
source output terminals. If connections are found to be
deteriorated or short-circuited, restore the original connections,
replacing any damaged components.
Check that the settings of the microswitch board (37) are
correct by following the instructions for TESTING MINIMUM
CURRENT THRESHOLD in section 3.6.13.
Correct?
NO
Correct?
NO
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17/09/2019