SECTION 6
PCM-875A Plasmarc System
Troubleshooting
6-9
6.3
Reference Voltage Checks
A. Control Board Assembly (PCB1)
LED’s
LED-1 - Torch
Switch
LED-2 - High
Frequency
LED-3
-
Gas Solenoid Valve
Voltage Test Points
Tests are made with power on - no arc.
Disable High Frequency by disconnecting blue wire
with black sleeve
TP-0 -
Ground
TP-1 -
+15
vdc
TP-2 -
+12
vdc
TP-3 -
-12
vdc
TP-4 -
+5
vdc
TP-9
-
IGBT’s driving signal - switching
frequency = 16 KHz
TP-10 -
IGBT’s driving signal - switching
frequency = 16 KHz
13 vdc
-13 vdc
5 msec
62 µsec
0
IGBT Gating Signal
For 208/230 VAC input, the IGBT off time is 3msec.
For 400/460/575 VAC input, the IGBT off time is 6msec.
Содержание PCM-875A
Страница 27: ...SECTION 2 PCM 875A Mechanized Plasma Cutting System Description 2 5 2 4 2 Dimensions 435 mm 34 9 mm ...
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Страница 84: ...SECTION 5 PCM 875A Plasmarc Cutting System Maintenance 5 12 This page intentionally left blank ...
Страница 112: ...SECTION 7 Replacement Parts 7 4 PCM 875A Power Console 230V P N 0558003356 230V CE 1 2 3 4 5 6 7 8 9 10 11 12 ...
Страница 120: ...SECTION 7 Replacement Parts 7 12 PCM 875A Power Console 400V P N 0558003357 400V CE 1 2 3 4 5 6 7 8 9 10 ...
Страница 126: ...SECTION 7 Replacement Parts 7 18 7 5 Remote Arc Starter RAS 2 P N 0558003670 A A B B View B B View A A 1 2 3 4 4 ...
Страница 128: ...SECTION 7 Replacement Parts 7 20 Remote Arc Starter RAS 2 P N 0558003670 1 2 3 4 5 6 7 5 REF 8 9 10 11 12 12 ...
Страница 130: ...SECTION 7 Replacement Parts 7 22 7 6 PT 20AMX Plasmarc Cutting Torch 1 4 6 7 8 9 10 11 12 13 14 16 2 3 5 17 18 1 15 ...
Страница 132: ...SECTION 7 Replacement Parts 7 24 PT 20 AMX Front End and Spare Parts Kit 1 2 3 4 5 8 6 7 9 ...
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Страница 135: ...See back of Title Page for revision list ...