User's Manual

M889-00

Introduction To Servicing 3.3

3.1 General

If you require further information about the T889 or this manual, contact your nearest

authorised Tait Dealer or Service Centre. Further assistance may be obtained from the

Customer Support Group, Radio Infrastructure Division, Tait Electronics Ltd, Christch-

urch, New Zealand.

When requesting this information, please quote the equipment type number (e.g.

T889-10) and serial number. In the case of the service manual quote the Tait Internal

Part Number (IPN), e.g. M889-00-100, and for circuit diagrams quote the “Title”, “IPN”

and “Issue”.

3.1.1 Caution: CMOS Devices

This equipment contains CMOS Devices which are susceptible to damage from static

charges. Care when handling these devices is essential. For correct handling proce-

dures refer to the manufacturers' data books, e.g. Philips data books covering CMOS

devices, or Motorola CMOS data books, Section 5 “Handling”, etc.

Figure 3.1 Typical Anti-static Bench Set-up

An anti-static bench kit (refer to Figure 3.1) is available from Tait Electronics Ltd under

the usual consumable goods ordering system. The kit is held in stock under IPN

937-00000-34 and contains:

1 conductive rubber bench mat

1 earth lead to connect the mat to ground (c/w 1M series resistor)

1 wrist strap

information leaflet.

3.1.2 Caution: Aerial Load

The equipment has been designed to operate safely under a wide range of aerial loading

conditions. However, it is strongly recommended that the transmitter should not be

operated in the absence of a suitable load. Failure to observe this warning may result in

damage to the transmitter output power stage.

conductive rubber

bench mat

metal frame

to building earth

(not mains earth)

via 1M series resistor

conductive

wrist strap