Verification Of The Primary Diode (D1) - Thermal Arc ARCMASTER 200 S Service Manual

5.4 Verification of the primary
Diode (D1)
CAUTION
Before performing any portion of the procedure
below, make certain the unit is placed in the initial
set up condition as described in section 11.4.1
"Preparation" on page 11-6.
1) Verify the characteristic of the primary diode,
D1, using a diode tester.
2) Refer to Table 11-4 and Figure 11-14 for
the checkpoints on D1.
TERMINALS
COMPONENT
Positive
TESTED
lead
1, 2, 3
Diode of D1
5
1, 2, 3
Diode of D1
4
Table 11-4: Tester checkpoints in the D1
1
2
3
Figure 11-13: Tester checkpoints for D1 and D1 inter-
connection diagrams
ACCEPTABLE
Negative
VALUE
lead
5 0.3 to 0.5V
1, 2, 3 Open
4 Open
1, 2, 3 0.3 to 0.5V
5 4 3 2 1
5
4
11 – 10
11
200S ADVANCED TROUBLESHOOTING