R.V.R. Elettronica PTX30 UHT/S3, Руководство пользователя

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PTX30 UHT /S3
23 / 36 User Manual Rev. 5.0 - 10/12/2001
8.3 Access to the modules
ATTENTION: opening the device, points with dangerous voltages and currents
are exposed. Always disconnect the mains supply before removing the covers or
taking away any part of the piece of equipment.
Remove all the screws on the upper cover of the exciter. After taking away the
cover, identify with the help of figures 8.1 and 8.2, the components of the exciter.
8.3.1 First level maintenance
The only regular maintenance needed by PTX30-UHT-S3, is the periodic
replacement of the blowers, and the cleaning of dust filters and any dust
accumulated inside the exciter.
The time between overhauling of the blowers depends upon several environmental
factors, temperature, humidity, dust pollution etc. Blowers should checked every 6
months and replaced if noisy.
They should be replaced any way after 18 months of service.
8.3.2 Second level maintenance
8.3.2.1 Stereo coder replacement
• Unscrew the top and bottom covers.
• Disconnect J1, J2, J3, J4 connectors.
• Unscrew the 4 bolts on the board.
• Unscrew the input level knob.
• Extract the board paying attention to disengage the switches and the
potentiometer from the main panel.
8.3.2.2 R.F. power amplifier replacement
• Unscrew the top and bottom covers.
• Disconnect connector CN1 on the external board.
• Unscrew the three screws placed on the under side of the internal chassis.
• Disconnect the shielded cable between the MAIN CARD and the R.F. Power
Amplifier.
• Extract the Power Amplifier Module.
8.3.2.3 Main card replacement
• Unscrew the top and bottom covers.
• Disconnect connectors J4, J5, J6, J7.