Motorola PM1200, Basic Service Manual

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Chapter 5 Radio Alignment and Programming
Procedures
5.1 Introduction of Radio Alignment Procedures
The PM1200 has been carefully aligned at the factory for the specified performance across the
frequency range specified for each version.
Realignment should therefore not be necessary except in the event of a component failure, or
alteration of version. All component replacement and service should be performed only by an
authorized Motorola representative, or the warranty policy may be voided.
The following procedures cover the sometimes critical and tedious adjustments that are not normally
required once the transceiver has left the factory. However, if damage occurs and some parts are
replaced, realignment may be required. If a sudden problem occurs during normal operation, it is
likely due to component failure; realignment should not be done until after the faulty component has
been replaced.
We recommend that servicing be performed only by authorized Motorola service technicians who are
experienced with the circuitry and fully equipped for repair and alignment. Therefore, if a fault is
suspected, contact the dealer from whom the transceiver was purchased for instructions regarding
repair. Authorized Motorola service technicians realign all circuits and make complete performance
checks to ensure compliance with factory specifications after replacing any faulty components.
Those who do undertake any of the following alignments are cautioned to proceed at their own risk.
Problems caused by unauthorized attempts at realignment are not covered by the warranty policy.
Also, Motorola must reserve the right to change circuits and alignment procedures in the interest of
improved performance, without notifying owners. Under no circumstances should any alignment be
attempted unless the normal function and operation of the transceiver are clearly understood, the
cause of the malfunction has been clearly pinpointed and any faulty components replaced, and the
need for realignment determined to be absolutely necessary. The following test equipment (and
thorough familiarity with its correct use) is necessary for complete realignment. Correction of
problems caused by misalignment resulting from use of improper test equipment is not covered
under the warranty policy. While most steps do not require all of the equipment listed, the
interactions of some adjustments may require that more complex adjustments be performed
afterwards. Do not attempt to perform only a single step unless it is clearly isolated electrically from
all other steps. Have all test equipment ready before beginning, and follow all of the steps in a
section in the order presented.