Programming instructions

125
Upgrades and FRUs
Replace Controller FRUs
This section contains detailed information on replacing the 3300 ICP Field
Replaceable Units (FRUs) (see page 363 for part numbers).
The section is organized as follows:
• “LX, 100, 250, 700-User Hard Drive” on page 126
• “MX Hard Drive” on page 127
• “MXe Hard Drive, Single” on page 128
• “CX/CXi Hard Drive” on page 131
• “System ID Module” on page 133
• “System i-Button (CX/CXi and MXe)” on page 133
• “Analog Main Board (MX Controller)” on page 134
• “Analog Main Board (MXe Controller)” on page 136
• “Analog Main Board (CX/CXi Controller)” on page 137
• “RTC Processor (MXe)” on page 138
• “Cooling Fan (MXe)” on page 139
• “Power Supply Unit (MXe)” on page 139
• “Stratum 3 Clock Module” on page 140.
Hard Drive Replacement Overview
Tip: See also “Add or Replace Controller FRUs” on page 104 and “Add
Controller FRUs” on page 116.
CAUTION: If you move a programmed hard drive from one
controller type to another (for example, an MX system to an
LX or CX system), you MUST manually install the software
(see page 77) and restore the database. A new hard drive
purchased from Mitel is configured for installation in any
system.
CAUTION: Both hard drives in a redundant hard drive MXe
must have the same part number.