INTRODUCTION
This service manual describes the latest service information for the
MODEL | VERSION | SYMBOL | |
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| U.S.A. | USA | |
T90A | General | GEN | |
Canada | CAN | ||
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| S.E. Asia | SEA | |
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To upgrade quality, all electrical or mechanical parts and inter- nal circuits are subject to change without notice or obligation.
DANGER
NEVER connect the transceiver to an AC outlet or to a DC power supply that uses more than 12 V. Such a connection could cause a fire hazard and/or electric.
DO NOT expose the transceiver to rain, snow or any liquids.
DO NOT reverse the polarities of the power supply when connecting the tranceiver.
DO NOT apply an RF signal of more than 20 dBm (100 mW) to the antenna connector. This could damage the transceiver s front end.
ORDERING PARTS
Be sure to include the following four points when ordering replacement parts:
1.
2.Component part number and name
3.Equipment model name and unit name
4.Quantity required
<SAMPLE ORDER>
1130006220 | S.IC | TC4W53FU | LOGIC UNIT | 1 piece | |
8930054290 | 2372 | Main seal | Chassis | 5 pieces |
Addresses are provided on the inside back cover for your convenience.
REPAIR NOTES
1.Make sure a problem is internal before disassembling the transceiver.
2.DO NOT open the transceiver until the transceiver is disconnected from its power source.
3.DO NOT force any of the variable components. Turn them slowly and smoothly.
4.DO NOT short any circuits or electronic parts. An insulated tuning tool MUST be used for all adjustments.
5.DO NOT keep power ON for a long time when the transceiver is defective.
6.DO NOT transmit power into a signal generator or a sweep generator.
7.ALWAYS connect a 40 dB or 50 dB attenuator between the transceiver and a deviation meter or spectrum analyser when using such test equipment.
8.READ the instructions of test equipment thoroughly before connecting equipment to the transceiver.
