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Icom IC-706 Service Manual

Icom IC-706
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4-2
PLL
ADJUSTMENT
MEASUREMENT
ADJUSTMENT
ADJUSTMENT
ADJUSTMENT
CONDITIONS
VALUE
POINT
UNIT
LOCATION
UNIT
ADJUST
REFERENCE
1
Displayed frequency:
Any
PLL
Connect an RF voltmeter Maximum level PLL
L37,L38
FREQUENCY
L36 (PLL unit)
: Center
to
P3. (0 dBm or more)
I--
Receiving
2
Connect a frequency 60.000000 MHz
L34,L36
counter to P3.
REFERENCE
1
Displayed frequency:
0.03000 MHz
PLL Connect a digital multi- 2.0 V
PLL
C104
LOOP LOCK
Mode
USB
meter
or
oscilloscope to
VOLTAGE
Receiving
LV1.
MAIN LOOP 1
Displayed frequency:
30.00000 MHz
PLL Connect a digital multi-
1.1
V PLL
L6
LOCK
Mode
:
USB
meter
or
oscilloscope to
VOLTAGE
Receiving
LV2.
2
Displayed frequency:
60.00000 MHz
1.1
V L3
4-3 RECEIVER ADJUSTMENT
MEASUREMENT
ADJUSTMENT
ADJUSTMENT
ADJUSTMENT
CONDITIONS
VALUE
POINT
UNIT
LOCATION
UNIT
ADJUST
SENSITIVITY
1
Displayed frequency :
14.10000 MHz
Rear Connect an AC millivolt- Maximum output MAIN Adjust
Mode
: USB
panel meter to [EXT SP] jack level repeatedly
(RIT]
: OFF
with an 8
n dummy load.
L47, L48,
[M4AGC)
: Fast (F
AGC)
L49, L53,
[M3NB]
: OFF
L54, L55,
[P.AMP/ATT]
: Preamp
L84,L85
[COMP GAIN]
: Center
(BEEP/SIDE
T]
: Center
[VOX GAIN]
: Center
(ANTI VOX]
: Max. counterclockwise
R126 (MAIN unit): Max. counterclockwise
Connect a standard signal generator to
[ANT
1]
and set as:
Frequency: 14.10150 MHz
Level :
0.5
JiV'
H 13 dBm)
Modulation: OFF
Receiving
2
Mode
FM
Connect a distortion
Minimum
Adjust
[M3NAR]
: OFF
meter to [EXT SP] jack. distortion level repeatedly
Set the standard signal generator as:
L47, L48,
Frequency:
14.10000 MHz
L49
Level
:
0.5 mV
(-53
dBm)
Modulation: 1 kHz
Deviation
:
±5kHz
3
[M3NARj
: ON
Adjust
Set the standard signal generator as:
repeatedly
Deviation:
±4 kHz
L53,L54
4
Displayed frequency:
146.00000 MHz
PA
Adjust
[M3 NARj
OFF
repeatedly
Connect the standard signal generator to
L29,L30
[ANT 2] and set as:
frequency:
146.00000 MHz
Deviation
:
±3.5kHz
* This output level of the standard signal generator (SSG) is indicated as SSG's open circuit.
4-2

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Icom IC-706 Specifications

General IconGeneral
Antenna Impedance50 ohms
Supply Voltage13.8 V DC ±15%
ModesSSB, CW, AM, FM
Current Drain Transmit20 A (max)
Sensitivity SSB/CW0.16 μV (10 dB S/N)
Sensitivity AM2.0 μV (10 dB S/N)
Selectivity SSB2.2 kHz/-6 dB, 4.5 kHz/-60 dB
Selectivity CW500 Hz/-6 dB
Selectivity AM6 kHz/-6 dB
Selectivity FM30 kHz/-60 dB

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