Service Manual Part 1
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T2000 Series II radios require specialised servicing techniques. Before attempting
any disassembly or repair, refer to Section 3, “Introduction To Servicing”.
Repairs attempted with incorrect equipment or by untrained personnel may
result in permanent damage. If in doubt, contact Tait Electronics Ltd or your
nearest Tait Branch or Subsidiary.
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Check that the radio is suitable for the required frequency range and IF band-
width (refer to Section 1.4, “Product Codes”).
Check that the programmed frequencies are correct.
Remove the covers from the T2000 and inspect the PCBs for damaged or broken
components, paying particular attention to the surface mounted devices (SMDs).
Check for obvious mechanical faults in the PCBs, controls, microphone, etc.
Check for defective solder joints.
If repair or replacement is considered necessary, refer to Section 3.4, “Repair”.
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Measure the forward and reverse resistance of the transistor junctions, first mak-
ing sure that the transistor is not shunted by some circuit resistance.
A 20kΩ/V or better multimeter should be used for taking the measurements,
using only the medium or low resistance ranges.
Check the collector current drawn by the transistor.
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Measure the DC operating voltages if the IC. Due to the catastrophic nature of
most IC failures, the pin voltages will usually be markedly different from the rec-
ommended values in the presence of a fault. The recommended values can be
obtained from either the circuit diagram or the component data catalogue.