Tait TM9100 Service Manual page 316

Some fault-diagnosis tasks require programming the radio with the lowest,
Frequency Bands
center or highest frequency in the radio's frequency band. The relevant
frequencies for the different bands are listed in
following frequency ranges are reserved worldwide for use by distress
beacons:
Do not program the radio with any frequency in the above ranges.
Table 12.2 Lowest, center and highest frequencies in MHz
Band
B1
H5
H6
There are five cans shielding the bulk of the transmitter circuitry:
Can Removal
To remove any can, first remove the main-board assembly from the chassis.
In the case of the
block from the main board. Secure the block again after removing the cans.
Follow the procedures given in
page
Replace all cans that have been removed only after repairing the board.
Can Replacement
This applies to the B1, H5 and H6 bands. For certain other bands the
transmitter will not operate correctly unless all the cans are fitted.
316 Transmitter Fault Finding (25W Radios)
B1 band: 156.8MHz ± 375kHz
H5 band: 406.0 to 406.1MHz
Lowest
frequency
136
400
450
PAD TOP
PAF TOP
DIRC TOP
PIN TOP
LPF TOP
and
PAD TOP
123.
Table 12.2. Note that the
Center
frequency
155
435
490
cans, first detach the heat-transfer
PAF TOP
"Disassembly and Reassembly" on
© Tait Electronics Limited August 2005
Highest
frequency
174
470
530
TM9100 Service Manual