Nortel Millennium multi-pay M1211, Installation, Operation And Maintenance Manual

Page: 186 / 350

7-10 Installing replaceable parts
Replacing the front housing assembly
Electrostatic
discharge
(ESD)
• Electronic components are sensitive to electro­
static discharge (ESD). Before working with the
PCP assembly, put on your ESD wrist strap and
connect it to the ESD connection points shown
in Figure 7-2.
• Before replacing any component, disconnect
the rear terminal board (cable J18) from the
control board connector (J5). This disconnects
the supplementary power supply, and the tip
and ring connections. The control PCP is on the
right side of the PCP assembly.
Failure to follow these
precautions may
damage the PCPs.
1. This procedure assumes you have followed the direc­
tions in Preparing the terminal for maintenance and
Opening the terminal. The power should be discon­
nected from the control PCP.
2. Disconnect the coin validator cable (J33) from the con­
trol PCP connector (J8).
Make sure you remove the cables from the cable clamp.
If you are unsure of cable connections, look for the
name of the connection printed on the PCP, or see
Interconnections of internal components in
Chapter 1.
3. With the terminal open, you will see that the front hous­
ing is supported by a link assembly tie-rod which hooks
onto a bracket at the top of the rear housing and about
mid-way in the center of the front housing.
Remove the link assembly arm from one of the brackets
in the following manner:
a) While supporting the front housing assembly, lift the
link assembly until the top link is loose and almost
parallel to the top of the housing, as shown in
Figure 7-4.
NTP: 506-6501-203 Document issue: 00.01 Status: Standard Date: January 1997