Codan 2110 series, Руководство по ремонту

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Functional description of PCBs
Manpack Transceiver 2110 series Repair Guide 41
08-06128-001
When ordering a replacement PCB, use the information in the listed spares drawing to
select the correct assembly (see
page 25, Interconnection diagrams and listed spares
drawings ).
CAUTION
If this PCB is replaced, ensure that:
• IC104 and IC301 have the same (or later) firmware version as the
original
• the replacement PCB has the same (or later) PCB version as the
original, that is 07-02028-vv
NOTE
All input signals for measuring Tx voltages are –10 dBv two-tone signals
from the 0208 test set (or equivalent), unless stated otherwise. This signal
level provides maximum ALC and therefore maximum output power for
taking the measurement.
NOTE
All input signals for measuring Rx voltages are –10 dBm from the RF
signal generator at ±1 kHz from SCF.
Table 10: Test points for the Audio & Control PCB (08-06128-001)
Test point Correct signal Explanation Source
53 – Not used
54 – Not used
97 Not used
+10V +10 V DC +10 V regulated supply PA & Filter PCB
+1V8 +1.8 V DC +1.8 V regulated supply IC106
+3V3 +3.3 V DC +3.3 V regulated supply IC106
+5V +5 V DC +5 V regulated supply IC105
+5VA +5 V DC +5 V regulated supply to
encryptor V105
A +12 to 13.2 V DC Switched, unregulated battery
supply PA & Filter PCB
AUDIO_IN– 170 mV p–p, single tone Pre-amplified Tx audio from
the microphone prior to
compression Front Panel PCB
A
AUDIO_OUT_
A Rx audio for the earphone,
internal and external speaker
after processing IC302
AUDIO_OUT_
B
CAL +5 V DC IC103