6
– 1
3
2 ) Refer to Table 11-5 and Figure 11-14 for
the checkpoints on D1.
Table
6
-5: Tester checkpoints for D1
Figure
6
-14: Tester checkpoints in the D1 inter-
connection diagrams
6.
5.6 Verification of the secondary
Diode (D2, D3)
CAUTION
Before performing any portion of the procedure
below, make certain the unit is placed in the initial
set up condition as described at the beginning of
an above section “1.Preparation”. Refer to section
6
.4-1.
1 ) Verify the characteristic of the secondary
diode, D2 and D3, using a diode tester.
2 ) Refer to Table
6
-6 and Figure
6
-15 for
the checkpoints on D2 and D3.
Table 11-6: Tester checkpoints for D2 and D3
Figure
6
-15: Tester checkpoints for D2 and D3
6.
5. 7 Verification of the primary
IGBT (Q1A-Q4C)
CAUTION
Before performing any portion of the procedure
below, make certain the unit is placed in the initial
set up condition as described at the beginning of
an above section “1.Preparation”. Refer to section
11.4-1.
1) Check whether there are any abnormalities on
the appearance of PCB6 and PCB7.
2) Verify the characteristic of the primary IGBT
(Q1A-Q4C), using a diode tester.
3) Refer to Table 11-7 and Figure 11-16 for
the checkpoints on PCB6 and PCB7.
COMPONENT
TESTED
TERMINALS
ACCEPTABLE
VALUE
Positive
lead
Negative
lead
Diode of D1
1, 2, 3
5
5
1, 2, 3
0.3 to 0.5V
Open
Diode of D1
1, 2, 3
4
4
1, 2, 3
Open
0.3 to 0.5V
1
2
3
4
5
5
4
1
2
3
COMPONENT
TESTED
TERMINALS
ACCEPTABLE
VALUE
Positive
lead
Negative
lead
Diode 1 of D2,
and D3,
Anode
Cathode
Cathode
Anode
0.2 to 0.3V
Open
Diode 2 of D2,
and D3,
Anode
Cathode
Cathode
Anode
0.2 to 0.3V
Open
Anode
Cathode
Anode
Cathode
TRANSTIG 200 Pi
ADVANCED TROUBLESHOOTING
SERVICE MANUAL