ITB ARCHIMEDE 5000 Series, Руководство пользователя

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Archimede 5000 series- FM Power Amplifiers
User’s manual – Page 19 of 65
6 C
I R C U I T S D E S C R I P T I O N

This section
’s sole purpose is to provide general explanations about the device operation in order to simplify the
maintenance by skilled personnel appointed by Italab. As already mentioned, no internal adjustments are required for
normal operation. Tampering with the internal settings makes the warranty null and void. Moreover, could seriously
damage the equipment, compromising the guaranteed performance.

Several modules are highly specialized and difficult to repair even by skilled technicians and must therefore be
replaced with new modules and, if possible, sent to the manufacturer in order to verify the possibility of a repair.

Any inspection of the described modules must be carried out with the cover removed and, in many cases, with the
equipment connected to the power line. Although some live parts are insulated and difficult to reach, this involves the
risk of accidental contact with the power line voltage. In order to avoid this, use only insulated tools and never touch
the main power supply switch or the power sockets when the equipment is connected to the power line.

Do not operate the equipment without the covers properly screwed on. If the top cover is removed, malfunctioning of
the equipment may occur, as well as of any other electronic measuring instrument, owing to the strong R.F. fields
involved.
The Archimede High Power models are mainly composed of the following elements:

Power supply section

Analog & controls board

Telemetry board (optional)

Fans control board

R.F. amplifier section

LCD display board

Digital encoder

If not otherwise specified, the following descriptions are valid for all Archimede High Power models.
6.1 Power supply section
According to the model and/or to the installed options, this section can be equipped with two or three power supply units (

Par. 5.3,
parts # [25] and [26]). The following table resumes the number of the units per each version:
Model Number of power supply units
Archimede 3000 standard version (single-phase 230V
AC
power supply) 2
Archimede 3000 with the three-phase with neutral wire 400V
AC
power
supply option (see note at the bottom of this table)
3
Archimede 4000 and Archimede 5000 (standard versions)
3

The third power supply unit, if mounted on Archimede 3000, is installed in the central position (

5.3, parts # [26])
For all models, the power supply units are AC/DC converters (3kW, 48V
DC
rating) with PFC (power factor correction) with output
voltage adjustable from 0 to 30V
DC
. This supply voltage is adjusted according to a 0-12V command signal sent by the analog &
controls board via a flat cable. The units produce two supply voltages: a 30-48V
DC
to supply the R.F. amplifier section, and a 15V
DC
to supply the service boards.