Toshiba FT-3809 BK Service Manual page 6

3. Handset unit :
3.1 Test equipment required and connection.
Audio
Generator
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
1 H/S Board into test
mode
2 H/S Board into test
mode
3 H/S Board into test
mode
4 H/S Board into test
mode
5 Audio Gen : 1KHz,
-20dB (NO Load)
6 Audio Gen : 1KHz,
-40dB (NO Load)
RX -Loop-V TX-Loop-V RX-Audio
Handset unit
MIC IN /
(RF & Audio Board)
RX Audio
Batt.
DC
3.6V
Adjustment
Connect the digital voltmeter to the PCB test point
--- RX-Loop-V. The reading should > 0.25V DC and
< 2.45V DC.
Connect the digital voltmeter to test point TX-
--- Loop -V. The reading should > 0.25V DC and <
2.45V DC.
HRC25 Connect the digital voltmeter to test point RX-
Audio. Adjust for 1.45VDC to 1.75VDC at CH6.
HVC1 Connect the Frequency counter to test point ANT.
Adjust for 926.55MHz at CH6.
HR113 Connect the VTVM to test point REC + Adjust for
-35dB
HR119 Connect the VTVM to test point TX Audio. Adjust
for -16dB.
5
Digital Voltmeter
TX Audio / REC +
ANT
Frequency
Counter
Remark
VTVM