Pll Adjustments; Transmitter Adjustments - Icom IC-706MKIIG Service Manual

4-2 PLL ADJUSTMENTS

ADJUSTMENT ADJUSTMENT CONDITION
1 • Display frequency: Any
REFERENCE
FREQUENCY • L623 (PLL unit)
• Receiving
2
1 • Display frequency: 0.0300 MHz
REFERENCE
LOOP LOCK • Mode
VOLTAGE • Receiving
1 • Display frequency: 128.99999 MHz
MAIN LOOP
LOCK • Mode
VOLTAGE • Receiving
2 • Display frequency: 199.99999 MHz
• Mode
• Receiving
3 • Display frequency: 470.00000 MHz
• Mode
• Receiving

4-3 TRANSMITTER ADJUSTMENTS

ADJUSTMENT ADJUSTMENT CONDITION
1 • Display frequency: 14.10000 MHz
TRANSMIT
TOTAL GAIN • Mode
• [Q1 RF POWER] : H
• Connect an audio generator to
[MIC] connector and set as:
1.5 kHz/3 mV
• Transmitting
2 • Transmitting
OUTPUT 1 • Display frequency: 14.10000 MHz
• Mode
POWER
• [Q2 MIC GAIN]
• Connect an audio generator to
[MIC] connector and set as:
1.5 kHz/30 mV
• Transmitting
2 • Display frequency: 52.00000 MHz
• Transmitting
3 • Display frequency: 145.00000 MHz
• Transmitting
4 • Display frequency: 435.00000 MHz
• Transmitting
CARRIER 1 • Display frequency: 14.10000 MHz
• Mode
SUPPRESSION
• Apply no signal to [MIC] connector.
• Transmitting
MEASUREMENT
UNIT
PLL
: Center
PLL
: USB
PLL
: USB
: USB
: USB
MEASUREMENT
UNIT
Rear
: USB Panel
Rear
: USB Panel
: 5
Rear
: USB and LSB Panel
4 - 2
LOCATION
Connect an RF volt- Maximum level
meter to check point (0 dB or more)
P681.
Connect a frequency 60.000000 MHz
counter to check
point P681.
Connect a digital 2.0 V
multimeter or oscillo-
scope to check point
CP131.
Connect a digital 4.0 V
multimeter or oscillo-
scope to check point
CP401.
4.0 V
4.0 V
LOCATION
Connect an RF Maximum RF power
power meter to
[ANT1] connector.
50 W
Connect an RF 100 W
power meter to
[ANT1] connector.
100 W
Connect an RF 50 W
power meter to
[ANT2] connector.
20 W
Connect a spectrum Minimum carrier level
analyzer to [ANT1]
connector via an
attenuator.
ADJUSTMENT
POINT
VALUE
UNIT ADJUST
PLL
PLL
PLL
ADJUSTMENT
POINT
VALUE
UNIT ADJUST
MAIN
MAIN
MAIN
L681,
L682
L601
L623
R602
C4
C306
C335
C367
L511,
L512,
L562,
L563,
L566
R579
R1082
R1084
R1086
R1088
R1045