82
Powermax30 AIR
Service Manual
808850
5 – Troubleshooting and System Tests
Test 3 – VBUS and voltage balance on power board
Test the power board (PCB2) to make sure the circuits are balanced. The test points are labeled on the back of the
power board, as are the voltages and positive and negative capacitor terminals. See
of test points.
1.
Set the power switch to OFF (
O
), and disconnect the power cord from the power source.
2.
Remove the power supply handle and cover. See
3.
Remove the component barrier. See
4.
Reconnect the electrical power.
5.
For each of the following 3 steps, carefully connect
the test hooks to the edges of the holes in the power
board so that the hook makes contact with the ring
on the back side of the power board.
CAUTION!
Do not use -VBUS (W) as ground. Doing so could destroy the power supply. Instead ground to either
the ground wire clip on the rear panel or to the heatsink. See
CAUTION!
Do not use a multimeter with test leads. This can cause a short-circuit between the BUS and the
heatsink. Use test hook leads instead, and attach them to the test point loops.
WARNING!
ELECTRIC SHOCK CAN KILL
Use extreme caution when working near live electrical circuits. Dangerous
voltages exist inside the power supply that can cause serious injury or death.
on page 57 before proceeding.
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Страница 24: ...24 Powermax30 AIR Service Manual 808850 1 Specifications ...
Страница 32: ...32 Powermax30 AIR Service Manual 808850 2 Power Supply Setup ...
Страница 96: ...96 Powermax30 AIR Service Manual 808850 5 Troubleshooting and System Tests ...
Страница 183: ...Powermax30 AIR Service Manual 808850 183 6 Power Supply Component Replacement Figure 92 2 3 4 1 ...
Страница 184: ...184 Powermax30 AIR Service Manual 808850 6 Power Supply Component Replacement ...
Страница 200: ...200 Powermax30 AIR Service Manual 808850 7 Torch Component Replacement ...
Страница 222: ...Powermax30 AIR Service Manual 808850 222 9 Wiring Diagrams Powermax30 AIR schematic 013393 Rev A SHEET 1 of 2 ...
Страница 223: ...Powermax30 AIR Service Manual 808850 223 9 Wiring Diagrams 013393 Rev A SHEET 2 of 2 ...