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
Summary of Contents for 2110 series
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