Tait TB7100, Руководство по обслуживанию

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78 General Information TB7100 Service Manual
© Tait Electronics Limited October 2005
6.2 Tools, Equipment and Spares
Torque-drivers
For level-1 and level-2 repairs, excluding SMT repairs of the circuit boards,
the following torque-drivers are required.
■
Philips #2 bit
■
PZ1 and PZ2 Pozidriv bit
■
Torx T10 bit
■
With the 50W/40W board, a Torx T6 bit is required to replace the
DC power connector.
Refer to the illustrations in “Disassembly and Reassembly” on page 99 for
the corresponding torque values.
Card Remover Tool
To remove the UI board, it is recommended to use the card remover tool
(220-02034-xx) included in the TBA0ST2 tool kit.
Tuning Tool
To tune the transmitter and receiver modules, it is recommended to use the
tuning tool (937-00013-xx) included in the TBA0ST2 tool kit.
Tools for SMT
Repairs
In general only the standard tools for SMT work are required for level-2
repairs of the circuit boards. In addition, a can-removal tool is recommended
but if none is available, a hot-air tool may be used instead. However, it
should be noted that a hot-air tool affords little control. Even in skilled
hands, use of a hot-air tool to remove cans will result in rapid uncontrolled
rises in the temperature of components under the can being removed as well
as under any adjacent cans. The circuit board might suffer damage as a result.
Test Equipment
The following test equipment is required:
■
test PC
■
calibration and test unit (TBA0STU or TBA0STP)
■
TB7100 CTU adapter (TBB0STU-TBB, included in TBA0STU)
■
TMAA20-04 cable (RJ12 socket to RJ45 plug, included in TBB0P00)
■
T2000-A19 cable (included in TBB0P00)
■
RF communications test set (audio bandwidth of at least 10kHz)
■
oscilloscope
■
digital current meter (capable of measuring up to 20 A)
■
multimeter
■
DC power supply (capable of 13.8 V and 10A for 25W base stations, and
20 A for 50 W/40 W base stations)
The standard test setup is illustrated in Figure 6.2 . Separate instruments may
be used in place of the RF communications test set. These are an RF signal
generator, audio signal generator, audio analyser, RF power meter, and
modulation meter.
An alternative test setup for testing the transmitter and receiver modules,
using the TOPA-SV-024 test unit and cables included in the TMAA21-00
kit and a TMAC20-0T control head is illustrated in
Figure 6.3 .