Tc-610/620 Uhf - HYT TC-610 Service Manual

Rotate to CH1,
CH2 and CH3
W respectively.
Press PTT to
transmit.
Modulation
Rotate to CH4,
Sensitivity
CH5 and CH6
respectively.
N
Press PTT to
transmit.

TC-610/620 UHF

Item Condition
Tx Rotate to CH2.
frequency Press PTT to
tolerance transmit.
Rotate to CH1.
Press PTT to
Tx VCO
transmit.
lock
voltage
Rotate to CH3.
Press PTT to
transmit.
Rotate to CH1.
Rx VCO
lock
voltage
Rotate to CH3.
Rotate to CH1,
CH2 and CH3
respectively.
W
Press PTT to
transmit.
Max.
Deviation
Rotate to CH4,
CH5 and CH6
N respectively.
Press PTT to
transmit.
Rotate to CH1,
CH2 and CH3
W respectively.
Press PTT to
transmit.
Modulation
Sensitivity
Rotate to CH4,
CH5 and CH6
respectively.
N
Press PTT to
transmit.
Radio
communication
test set
BPF: 0.3
KHz～3KHz
AF: 1KHz
Measurement
Test Equipment Test Point
Radio
communication test
set
Digital voltmeter
Radio
communication test
set
BPF:<20Hz~15kHz
AF: 1kHz 150mV
Antenna
Accessory
jack
Radio
communication test
set
BPF: 0.3-3KHz
AF: 1KHz
62
TC-610/620 Service Manual
Adjust the output
audio signal of the
radio communication
test set to get the
deviation to 3.0KHz.
Adjust the output
audio signal of the
radio communication
test set to get the
deviation to 1.5KHz.
Adjustment
Parts
Adjust VR300 with a
ceramic tuning
Antenna VR300 toolto limit the
center frequency to
the error range.
Adjust TC100 with a
ceramic tuning
tooluntil the lock
voltage is within the
TC100
required range.
Check
CV
Adjust TC101 with a
ceramic tuning
tooluntil the lock
voltage is within the
TC101
required range.
Check
Adjust VR200 with a
ceramic tuning
toolto limit the
deviation to the
specified range.
VR200
Check
Adjust the output
audio signal of the
radio
communication test
set to get the
deviation to 3.0KHz.
Adjust the output
audio signal of the
radio
communication test
set to get the
deviation to 1.5KHz.
8～15mV
8～15mV
Specificati
ons
Method
/Remarks
≤150Hz
0.7V
(+0.1V)
≥2.3V
0.7V
(+0.1V)
≥2.3V
3.7
4.3KHz
1.7
2.2KHz
8～18mV
8～18mV
～
～