Thermal Arc 185 AC, Руководство по обслуживанию

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10-16
May 22, 2006
ARCMASTER 185 ACDC 200 ACDC
4. Verification of the secondary Diode (D2,
D4, D5)
1) Verify the characteristic of the secondary diode,
D2, D4 and D5, using a diode tester.
2) Refer to Table 10-6 and Figure 10-15 for the
checkpoints on D2, D4 and D5.
COMPONENT
TESTED
TERMINALS
ACCEPTABLE
VALUE
Positive
lead
Negative
lead
Diode 1 of D2,
D4 and D5
Anode
Cathode
Cathode
Anode
0.2 to 0.3V
Open
Diode 2 of D2,
D4 and D5
Anode
Cathode
Cathode
Anode
0.2 to 0.3V
Open
Table 10-6: Tester checkpoints for D2, D4 and D5
Anode
Anode
Cathode
Cathode
Figure 10-15: Tester checkpoints for D2, D4 and D5
5. Verification of the primary IGBT (Q1-Q12)
1) Check whether there are any abnormalities in the
appearance of PCB8 and PCB9.
2) Verify the characteristic of the primary IGBT (Q1-
Q12), using a diode tester.
3) Refer to Table 11-7 and Figure 11-16 for the
checkpoints on PCB8 and PCB9.
COMPONENT
TESTED
TERMINALS
ACCEPTABLE
VALUE
Positive
lead
Negative
lead
Collector-Emitter
of Q1A'Q12 with
PCB8 and PCB9
C
CE
CE
C
Open
0.2 to 0.5V
CE
E
E
CE
Open
0.2 to 0.5V
Table 10-7: Tester checkpoints for Q1-Q12
C
CE
E
PCB8
PCB9
Figure 10-16: Tester checkpoints for Q1-Q12