The material contained in this document is the property of Electronics & Innovation Ltd., it is
subject to change without notice.
February 007 Page 8 of 10 Revision C
This chapter therefore, deals only with certain fundamental procedures for fault
location and with the subsequent re-alignment procedures.
Performance limits quoted are for guidance only and should not be taken for
guaranteed performance specifications unless they are also quoted in Figure 1.
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 403LA 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 does have a separate fuse. This fuse is rated at .5 amps /
50 Volts. It can be accessed without further disassembly. The power supply is
mounted vertically on the left hand side of the amplifier. The fuse is located to the
rear of the unit as indicated below.
