Handling precautions are mandatory for CMOS/LDMOS circuits and are especially important in low
humidity conditions. Do not attempt to disassemble your radio without referring to the following caution
statement.
CAUTION:
This radio contains static-sensitive devices. Do not open your radio unless you are properly
grounded. Take the following precautions when working on this unit:
• Store and transport all CMOS/LDMOS devices in conductive material so that all exposed
leads are shorted together. Do not insert CMOS/LDMOS devices into conventional plastic
"snow" trays used for storage and transportation of other semiconductor devices.
• Ground the working surface of the service bench to protect the CMOS/LDMOS device. It
is recommended that you use a wrist strap, two ground cords, a table mat, a floor mat,
electrostatic discharge (ESD) shoes, and an ESD chair.
• Wear a conductive wrist strap in series with a 100k resistor to ground. Replacement
wrist straps that connect to the bench top covering are Motorola Solutions part number
4280385A59.
• Do not wear nylon clothing while handling CMOS/LDMOS devices.
• Do not insert or remove CMOS/LDMOS devices with power applied. Check all power
supplies used for testing CMOS/LDMOS devices to be certain that there are no voltage
transients present.
• When straightening CMOS/LDMOS pins, provide ground straps for the apparatus used.
• When soldering, use a grounded soldering iron.
• Handle CMOS/LDMOS devices by the package and not by the leads. Before touching the
unit, touch an electrical ground to remove any static charge that you may have accumulated.
The package and substrate may be electrically common. If so, the reaction of a discharge to
the case would cause the same damage as touching the leads.
5.3
MTP8500Ex and MTP8550Ex Replacement Parts List
The radio replacement parts list identifies all the serviceable components and part/kit numbers of the
radio.
For complete information on ordering required parts and kits, contact your local customer service
representative.
Table 16: MTP8500 and MTP8550 Replacement Parts List
No. Part/Kit Num-
ber
Description Remark
1 HW000183A01 Knob Serviceable.
5.4
Accessories Replacement Parts List
For the latest accessories replacement parts list, refer to the MTP8*** Ex Important
Safety Instruction and Approved Accessory Booklet (Part No: MN002135A01) or visit https://
learning.motorolasolutions.com/.
MN002465A01-AN
Chapter 5 : Maintenance
56
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