Power Supply Replacement—All Microprocessor Controlled Machines Except the CBW
®
PELLERIN MILNOR CORPORATION
Figure 2: Processor-to-Power Supply-to-Power Source Electrical Connections
Schematic Diagram
Legend
1.
Processor board
2.
10-pin connector on processor board (MTA1 or MTA31 or 1MTA31)
3a.
Wire designation (printed on wire and shown in machine electrical schematics)
3b.
Possible wire colors if replacing old style “black box” power supply
4.
15 ohm, 3 watt
regulating resistor
used on System 7
®
and E-P Plus
®
washer-extractors only.
5a.
Wire designation
5b.
Wire colors on six-pin connector wire harness supplied with kit. Your existing wire harness may
be the same.
6.
Six-pin connector (processor board side)
7.
New power supply
8.
Five pin connector (incoming power side)
9a.
Wire designation
9b.
Wire colors on five-pin connector wire harness supplied with kit
10.
Metal oxide varister (MOV)
Observing caution statement
2
and referring to Figure 2, make the electrical connections
appropriate for your machine, as follows.
2.1.
Kit 08PSS3401X (for Newer Machines)
—Once the power supply has been swapped out
and the electrical connectors plugged into the new power supply, all that remains is to install the
MOV
, and if applicable, the resistor.
1. Install the MOV across the power supply's incoming power conductors, as shown in Figure 2.
Splice the leads of the MOV as close as possible to the connector on the power supply side.
The MOV is not polarity-sensitive.
2.
Only
if the machine is a coin, single formula, System 7
®
, or E-P Plus
®
washer-extractor,
install the regulating resistor, as shown in Figure 2. Again, splice the leads of the resistor as
close as possible to the connector on the power supply side. The resistor is not polarity-
sensitive.
