Cebora SYNSTAR 270 T Manual De Reparaciones página 33

Correct?
YES
INVERTER BOARD POWER SUPPLY TEST
□ Power board (56), connectors:
− J11-1(-), J11-3(+) = +40 VDC, approx. (supply motor speed control circuits on panel board (47);
− J5-B(-), FAN3, pin 1(+) = +24 VDC;
− J5-B(-), J10-1(+) = +15 VDC;
− J5-B(-), J10-3(+) = -15 VDC;
− J5-B(-), heatsink of U3(+) = +5 VDC;
− J4-4(-), J4-1(+) = +25 VDC, with free connector 14 (cooling unit interface circuits).
All with switch (14) closed.
Correct?
YES
PANEL BOARD (47) POWER SUPPLY TEST
□ Panel board (47), connector J20, terminals 1(+) and 2(-) = +15 VDC approx., with switch (14) closed.
□ Panel board (47), connector J20, terminals 4(+) and 3(-) = +40 VDC, with switch (14) closed.
□ Panel board (47), connector J7, terminals 1(+) and 3(-) = +5 VDC, with switch (14) closed.
□ Panel board (47), connector J7, terminals 2(+) and 3(-) = +3.3 VDC, with switch (14) closed.
Correct?
YES
■ Replace power board (56) and/or panel board (47).
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♦
Check the wiring between FAN1 of power board (56) and
secondary windings of service transformer (54).
♦
Check the fuses on the 18 VAC and 30 VAC secondary
NO
windings of service transformer (54) are intact. If blown,
replace them, checking the resistance at terminals 1-5 and
terminals 4-8 of the FAN1 connector of power board (56).
Correct value = >Mohm, at both measurement points and
in both measurement directions. If not correct, replace
power board (56).
♦
Check for faulty components on power board (56), based
NO
on the connector map in section 5.6.
♦
Replace power board (56).
♦
Check the wiring between J11 on power board (56) and
J20 on panel board (47).
♦
If the incorrect voltage is +3.3 VDC, look for possible
NO
anomalies in the power supply circuits on panel board (47)
(U18-U21 etc.). (see connector map in section 5.4).
♦
Replace power board (56) and/or panel board (47).
EN
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