Measurement - Thermal Arc 201 TS Service Manual

THERMAL ARC 161STL, 201TS
!
Read and follow safety information in Section 6.02 before proceeding.
Measure point 1 to 18.
1. Measurement of Input Rectifier
Set multimeter to diode mode. Diode voltage drop reading should be in the range of 0.200 V - 0.700 V.
If reading is out of voltage drop range, disconnect two parallel rectifiers and measure separately to determine
faulty rectifier and replace it.
2. Measurement of Main IGBT
Set multimeter to diode mode. Diode voltage drop reading shuld be in the range of 0.200-0.600V.
If reading is out of voltage drop range, replace main board.
3. Measurement of PFC IGBT
Set multimeter to diode mode. Diode voltage drop reading should be in the range of 0.200-0.600V.
If reading is out of voltage drop range, replace main board.
4. Measurement of Boost Diode
Set multimeter to diode mode. Diode voltage drop reading should be in the range of 0.200-0.600V.
If reading is out of voltage drop range, replace main board.
5. Measurement of Output Diode
Set multimeter to diode mode. Diode voltage drop reading should be in the range of 0.200-0.600V.
If reading is out of voltage drop range, replace main PCB1.
Troubleshooting
Positive Probe
Measure Point 2
Measure Point 4
Measure Point 3
Measure Point 3
Positive Probe
Measure Point 6
Measure Point 8
Positive Probe
Measure Point 9 Measure Point 10
Positive Probe
Measure Point 12 Measure Point 11
Positive Probe
Measure Point 13 Measure Point 14
Measure Point 15 Measure Point 16
6-6
Negative Probe
Measure Point 1
Measure Point 1
Measure Point 2
Measure Point 4
Negative Probe
Measure Point 5
Measure Point 7
Negative Probe
Negative Probe
Negative Probe
TROUBLESHOOTING
Manual 0-5148