Powermax1250 – Hypertherm Powermax1250 Service Manual User Manual

Page 75

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4

MAINTENANCE

3-42

powermax1250

Service Manual

Installation

1. Seat the power board into the base of the power supply. Then replace the retaining screws that hold the power

board in place.

2. Attach all gate drives, cables, IGBT and capacitor screws, wires and input and output diode screws.

Note:

The required torque for each of these screws is 20 in-lb (24 kg cm).

J1, 2-pin,
red/black

J2, 3-pin,
yellow/black

J3, 2-pin,
yellow/black

J5 3-pin,
red/yellow/black

Ribbon
cable

Black wire

Black cable

Pilot arc gate
drive (J12)

J20, 3-pin,
red/black

J21, 2-pin,
red/black

Yellow cable
and black wire

Yellow cable

Black cable

Current sensor
cable (J9)

IGBT gate drives
(J6, J7 and J8)

J13, black wire
through the hole
in the board

J11

3. Reattach the work lead, and power cord ground cable.

4. Re-install the ETR barrier and reconnect the torch lead.

5. Replace the insulation panel and the cover on the power supply.

6. Reconnect the gas supply and the electrical power.

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