Cebora PLASMA PROF 164 HQC Service Manual page 18

CEBORA S.p.A.
♦ Make sure there is 27 Vac voltage on terminals TP2 - 27V of fuse board (50); if
missing, check the wiring between the service transformer and fuse board (50),
and if necessary replace the service transformer (50).
TRANSFORMER (56) POWER SUPPLY TEST.
Primary circuit terminal board of the transformer(56), terminals 0 and 230 = 230 Vac, with
switch (39) closed.
♦ Check the wiring between transformer (56) primary circuit and service voltage
change terminal board and switch (39).
♦ Check fuse on the terminal board of the transformer (56) on the primary side.
Replace if interrupted, first checking the resistance of the primary circuit of the
transformer (56). Correct value = approximately 7.5 ohm. If incorrect, replace
transformer (56).
GAS CONSOLE POWER SUPPLY TEST.
Solenoid board (2), connector J2, terminals 1 and 2 = 24 Vac; terminals 4 and 5 = 27 Vac.
♦ Check the wiring between J2 of solenoid valve board (2), connector (16) on Gas
Console, connector (3) on Power Source and transformer (56).
♦ Check fuses on the terminal board of the transformer (56) on the secondary circuit
side; replace if broken, checking in advance the resistance on terminals 1 - 2 and 4
- 5 of J2 on solenoid valve board (2). Correct values: >Mohm in both
measurement directions; If incorrect, replace solenoid valve board (2). Also check
the resistance of the winding of each solenoid valve on the Gas Console. Correct
value = approximately 12 ohm, for each solenoid valve. If incorrect replace the
defective solenoid valve, making sure that the corresponding drive circuit on
solenoid valve board (2) has not been damaged. If so, also replace solenoid valve
board (2).
PANEL BOARD (20) POWER SUPPLY TEST.
Panel board (20), connector J9, terminals 1(+) and 3(-) = +18 Vdc; terminals 4(+) and 3(-) =
+8 Vdc.
♦ Check the wiring between J9 panel board (20) and J1 solenoid valve board (2).
♦ With Power Source off, temporarily disconnect J9 on panel board (20) and check
on J1 of solenoid valve board (2), terminals 1(+) and 3(-) voltage = +18 Vdc and
terminals 4(+) and 3(-) = +8 Vdc. If correct, replace the panel board (20). If
incorrect, replace solenoid valve board (2), making sure that terminals 1 - 3 and 4
- 3 of J9 on panel board (20) have not been short-circuited. If necessary, also
replace the panel board (20).
3.302.218
Correct?
YES
Correct?
YES
Correct?
YES
NO
NO
NO
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9/8/2006