FM TRANSMITTER
TR EM 1000 HE DIG PLUS COMPACT
Technical Manual 1v2 November 2019 4
GOOD PRACTICES
During the maintenance of the equipment covered in this Manual, please keep in mind the
following standard good practices:
x When connecting any instrument (wattmeter, spectrum analyzer, etc.) to a high
frequency output, use the appropriate attenuator or dummy load to protect the final
amplifiers and the instrument input.
x When inserting or removing printed circuit boards (PCBs), cable connectors, or fuses,
always turn off power from the affected part of the equipment. After power is
removed, allow sufficient time for the capacitors to bleed down before reinserting
PCBs. Always use discharge stick when available.
x When troubleshooting, remember that FETs and other metal-oxide-semiconductor
(MOS) devices may appear defective because of leakage between traces or component
leads on the printed circuit board. Clean the printed circuit board and recheck the
MOS device before assuming it is defective.
x When replacing MOS devices, follow standard practices to avoid damage caused by
static charges and soldering.
x When removing components from PCBs (particularly ICs), use care to avoid damaging
PCB traces.
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