PELLERIN MILNOR CORPORATION
BICUUR01 (Published) Book specs- Dates: 20031217 / 20031217 / 20031217 Lang: ENG01 Applic: CUU
Replacing Power Supply 08PSS3401T (for Retrofit Kits
08PSS3401N and 08PSS3401X)
The power supply provided with this kit is a 40 watt unit with 5VDC, +12VDC and -
12VDC outputs, used on many Milnor machines. Although it replaces a power supply of the same
general specifications, you will probably need to make certain modifications to accommodate the
new power supply. If you received kit 08PSS3401N, you will likely need to make mechanical
modifications. No matter which kit you received, you may also need to make electrical
modifications. The possible modifications include:
Install new bracketry (kit 08PSS3401N)
—If you received kit 08PSS3401N, your machine
probably has an older style power supply. If so, you will need to install the bracketry and use the
wire harnesses supplied with the kit to accommodate the newer style power supply.
Install a metal oxide varistor (MOV)
—The MOV is supplied with both kits and must be
installed across the new power supply's incoming power conductors, on any machine. This
component protects the power supply from damage due to electrical spikes.
Install a regulating resistor
— The resistor is supplied with both kits but is used
only
on
machines that don't already have this resistor on the processor board. It must be installed across
the new power supply's 5 volt DC output conductors, as shown in Figure 2.
Please verify that all components listed in the kit parts list were supplied. Contact the Milnor
Parts Department if any items are missing.
WARNING 1 : Electrocution and Electric Shock Hazards
—You can be electrocuted or
seriously injured if you come in contact with 240 VAC or 120 VAC (depending on model)
power, which is present in the processor electric box.
• Lock out/tag out power to the machine while replacing the power supply.
• Use caution while testing and adjusting the new power supply with power on.
• Do not attempt these procedures unless qualified and authorized.
CAUTION 2 : Component Damage Hazard
—Electronic components will fail if not
properly connected. Warranties can be voided if failure to follow these procedures results in
damaged components.
• The ground trace on the power supply must be connected to the chassis of the machine, as
explained herein.
• The regulating resistor must be
installed
if the processor board does not already contain
this component and
omitted
if it does, as explained herein.
• Carefully read and understand this instruction before proceeding.
1.
Mounting the New Power Supply
Depending on the original equipment, new bracketry may be needed to accommodate the new
power supply. Whether or not this is the case, the new power supply board must be mounted as
shown in Figure 1.