5
3. Handset unit :
3.1 Test equipment required and connection.
3.2 Preparation from alignment
Place the H/S Board into test mode, disconnect microphone wire at H/S Board and set
the volume to “L” position.
3.3. Alignment procedure :
Step
Preset
Adjustment
Remark
1
H/S Board into test
mode
---
Connect the digital voltmeter to the PCB test point
RX-Loop-V. The reading should > 0.25V DC and
< 2.45V DC.
2
H/S Board into test
mode
---
Connect the digital voltmeter to test point TX-
Loop -V. The reading should > 0.25V DC and <
2.45V DC.
3
H/S Board into test
mode
HRC25
Connect the digital voltmeter to test point RX-
Audio. Adjust for 1.45VDC to 1.75VDC at CH6.
4
H/S Board into test
mode
HVC1
Connect the Frequency counter to test point ANT.
Adjust for 926.55MHz at CH6.
5
Audio Gen : 1KHz,
-20dB (NO Load)
HR113
Connect the VTVM to test point REC + Adjust for
-35dB
6
Audio Gen : 1KHz,
-40dB (NO Load)
HR119
Connect the VTVM to test point TX Audio. Adjust
for -16dB.
Digital Voltmeter
RX -Loop-V TX-Loop-V RX-Audio
MIC IN /
Handset unit
RX Audio
(RF & Audio Board)
TX Audio / REC +
Batt. ANT
Audio
Generator
VTVM
DC
3.6V
Frequency
Counter
Содержание FT-3809 BK
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