The material contained in this document is the property of Electronics & Innovation Ltd., it is subject to change
without notice.
February 2007 Page 10 of 17 Revision C
4.2
Packing for Reshipment
In the event of the equipment being returned for servicing it should be packaged in the original
shipping carton and packing material. If this is not available wrap the instrument in heavy paper or
plastic and place in a rigid outer box of wood, fiberboard or very strong corrugated cardboard. Use
ample soft packing to prevent movement. Provide additional support for projecting parts to relieve
these of unnecessary shock. Close the carton securely and seal with durable tape. Mark the shipping
container FRAGILE to ensure careful handling.
4.3 Access and Layout
NB: Removal of the cover voids the warranty!
The E&I Model 325LA amplifier is housed in an aluminum chassis. A block diagram schematic is
illustrated in figure 4. The cover can be removed by releasing the 6 M3 screws on the side of the unit.
The rear panel supports the mains fuse holder, AC line cord and the cooling fan.
4.4 Power supply
The power supply is mounted vertically on the right hand side of the amplifier. It is a wholly self
contained unit controlled by the control board.
4.5
The Amplifier Module
The power amplifier module is mounted on the RF heat sink. To remove this module, the RF heat
sink must be demounted from the chassis. The RF drive unit sits underneath the PA section
Chapter 5 Safety:
Do not attempt to operate this unit with the cover removed. High AC, RF and DC voltages are
present. The cover prevents against electrical shock due to AC line voltages, high DC and RF fields.
Further the cover provides part of the cooling system design. Components, specifically on the RF
boards are prone to over-heat and eventual failure if the unit is operated without the cover in place.
Ensure that the load is connected to the output prior to connecting the RF input to the unit. This will
prevent high voltages being present and exposed at the output connector.
Only use the AC cord provided or equivalent.
Ensure that the mains outlet is properly grounded.
