R.V.R. Elettronica TEX20-NV, Technical Manual

Page: 42 / 110

TEX20-NV Technical and Maintenance Manual
R.V.R. Elettronica S.r.l. (Bo) Pag. 42
6) Disconnect fastons JP1 and JP2 situated on the bridge rectifier.
7) Carefully lift out the power supply.
4.8 FREQUENCY SELECTOR (CONTRAVES) CARD REPLACEMENT
1) Open the top cover of the unit.
2) Disconnect connector CN1 situated on the Contraves card.
3) Unscrew the two fixing screws on the front panel.
4) Remove the Contraves card.
4.9 FAN REPLACEMENT
1) Open the top cover of the unit.
2) For an easy replacement, remove R.F. Amplifier and Power Supply.
3) Desolder the power supply wires of the fan (for 220V version) or
disconnect fastons on the diodes bridge (for 24V version).
4) Unscrew the four fixing screws of the fan situated on the rear panel.
5) Remove the fan from the equipment.
4.10 TRANSFORMER REPLACEMENT
1) Open the top cover of the unit.
2) Cut the ties of the wires connecting the transformer to VDE socket.
3) Desolder the power supply wires of the transformer from VDE socket.
4) Disconnect JP1 and JP2 fastons on the diode bridge.
5) Unscrew the fixing nut of the transformer situated on its central
kingbolt.
5) Remove the transformer from the equipment.
CHAPTER 5