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Icom IC-A25C Service Manual

Icom IC-A25C
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4-5a
(Replacement page)
March 2019
ADJUSTMENT
ADJUSTMENT
ITEM
TRANSCEIVER'S
CONDITION
OPER ATION VALUE
NO. NAME
MODULATION
(at 11.0 V)
1
025 EXT
25MML
Frequency: 118.000 MHz
Transmitting
• Detach the battery pack.
• Connect the DC power supply to
[DC 11 V].
• While transmitting, adjust the power
supply voltage to 11.0 V.
• Connect the modulation analyzer to
the antenna connector, through the
attenuator, and set it to:
HPF: OFF
LPF: 20 kHz
De-emphasis: OFF
Detector: (PP)/2
• Connect the audio generator to
[MIC], and set it to:
Frequency: 1 kHz
Level: 200 mV rms
Waveform: Sine wave
USA, EXP:
87% (±2%)
EUR, AUS:
90% (±2%)
2
026 EXT
25MMM
• Frequency: 127.500 MHz
Transmitting
3
027 EXT
25MMH
Frequency: 136.975 MHz
Transmitting
4
028 EXT
8MML
Frequency: 118.005 MHz
Transmitting
USA, EXP:
80% (±2%)
EUR, AUS:
90% (±2%)
5
029 EXT
8MMM
• Frequency: 127.505 MHz
Transmitting
6
030 EXT
8MMH
Frequency: 136.980 MHz
Transmitting
7
037 EXT
25NML
Frequency: 118.000 MHz
Transmitting
Set the audio generator to:
Level: 20 mV rms
30% (±5%)
8
038 EXT
25NMM
• Frequency: 127.500 MHz
Transmitting
9
039 EXT
25NMH
Frequency: 136.975 MHz
Transmitting
10
040 EXT
8NML
Frequency: 118.005 MHz
Transmitting
11
041 EXT
8NMM
• Frequency: 127.505 MHz
Transmitting
12
042 EXT
8NMH
Frequency: 136.980 MHz
Transmitting
The underlined parts have been updated from the previous version of the addendum, or the original page.
4-2 FREQUENCY AND TRANSMIT ADJUSTMENTS (CONTINUED)
1. Select an adjustment item by pushing [
]/[
].
2. Set or modify the adjustment value as specified by rotating [DIAL], and then push [ENT].

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Icom IC-A25C Specifications

General IconGeneral
PurposeAviation Service (Air Band)
Operating frequency118.000 – 136.992 MHz
Display typeLCD
Display diagonal2.3 \
Battery typeBP-288
Battery life (max)10.5 h
Battery low indicationYes
Number of batteries supported1
Product colorBlack
Operating temperature (T-T)-10 - 60 °C
Number of batteries included1 pc(s)
Antenna connector typeFA-B02AR
Weight and Dimensions IconWeight and Dimensions
Depth31.8 mm
Width58.9 mm
Height148.4 mm
Weight384 g

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