180
Frequency Synthesizer Fault Finding
TM8100/TM8200 Service Manual
© Tait Electronics Limited
June 2006
9.1
Initial Checks
Types of checks
There are two different types of initial checks, which are covered in the
following tasks:
■
■
: lock status.
Which, if any, of these tasks needs to be carried out depends on the
symptoms of the fault.
Symptoms of Fault
The symptoms of the fault may be divided into three categories:
■
radio fails to power up and system error is displayed
■
lock error is displayed
■
radio is in lock but exhibits transmit or receive fault.
The nature of the display depends on the type of control head as shown in
.
In the first two cases the checks of
respectively are
required. In the last case there are several symptoms; these are listed below.
Frequency Bands
Where test procedures or figures differ according to the frequency band of
the radio, the frequency band is given in brackets. The frequency band may
be referred to as either ‘VHF’ (very high frequency) or ‘UHF’ (ultra high
frequency) or identified by the frequency sub-band, such as ‘B1’ or ‘H7’.
The product-code label on the radio body will identify the frequency band
as described in
. A definition of frequency
bands is given in
“Defining Frequency Bands” on page 126
.
Table 9.2
Format of error displays by different control heads
Control head
Type of error
Lock error
System error
1-digit-display control head
L
E
2-digit-display control head
OL
E2
3-digit-display control head
OL
E2
Graphical-display control head
Out of lock
System error
Summary of Contents for TM8235
Page 1: ...TM8100 mobiles TM8200 mobiles Service Manual MMA 00005 04 Issue 4 June 2006...
Page 10: ...10 TM8100 TM8200 Service Manual Tait Electronics Limited June 2006...
Page 62: ...62 Description TM8100 TM8200 Service Manual Tait Electronics Limited June 2006...
Page 148: ...148 Disassembly and Reassembly TM8100 TM8200 Service Manual Tait Electronics Limited June 2006...
Page 162: ...162 Servicing Procedures TM8100 TM8200 Service Manual Tait Electronics Limited June 2006...
Page 178: ...178 Interface Fault Finding TM8100 TM8200 Service Manual Tait Electronics Limited June 2006...
Page 258: ...258 Receiver Fault Finding TM8100 TM8200 Service Manual Tait Electronics Limited June 2006...
Page 446: ...446 Spare Parts TM8100 TM8200 Service Manual Tait Electronics Limited June 2006...
