Icom IC-7800

4 - 10
4-4 RXPLL-B UNIT ADJUSTMENTS
40M OUTPUT
LPL LOCK
VOLTAGE
HPL LOCK
VOLTAGE
(VCO1)
(VCO2)
(VCO3)
(VCO4)
(VCO5)
(VCO6)
(VCO1)
(VCO2)
(VCO3)
(VCO4)
(VCO5)
ADJUSTMENT
ADJUSTMENT ADJUSTMENT CONDITION
MEASUREMENT
VALUE
POINT
UNIT LOCATION UNIT ADJUST
1
1
2
1
2
3
4
5
6
7
8
9
10
11
• Dualwatch : ON
• SUB display frequency
: 60.000 MHz
• Mode : USB
• Receiving
• SUB display frequency
: 60.000 MHz
• Mode : USB
• Receiving
• SUB display frequency
: 1.499 MHz
• Mode : USB
• Receiving
• SUB display frequency
: 7.999 MHz
• Mode : USB
• Receiving
• SUB display frequency
: 14.999 MHz
• Mode : USB
• Receiving
• SUB display frequency
: 21.999 MHz
• Mode : USB
• Receiving
• SUB display frequency
: 29.999 MHz
• Mode : USB
• Receiving
• SUB display frequency
: 44.999 MHz
• Mode : USB
• Receiving
• SUB display frequency
: 60.000 MHz
• Mode : USB
• Receiving
• SUB display frequency
: 0.030 MHz
• Mode : USB
• Receiving
• SUB display frequency
: 8.000 MHz
• Mode : USB
• Receiving
• SUB display frequency
: 15.000 MHz
• Mode : USB
• Receiving
• SUB display frequency
: 22.000 MHz
• Mode : USB
• Receiving
• SUB display frequency
: 30.000 MHz
• Mode : USB
• Receiving
RX
PLL-B
RX
PLL-B
RX
PLL-B
RX
PLL-B
Connect an RF volt-
meter to CP701
(40 MHz).
Connect a DC volt-
meter to CP1 (LV1).
Connect a DC volt-
meter to CP2 (LV2).
Connect a DC volt-
meter to CP2 (LV2).
Maximum voltage
2.0 V ±0.1 V
Less than 4.0 V
4.0 V ±0.1 V
4.0 V ±0.1 V
4.0 V ±0.1 V
4.0 V ±0.1 V
4.0 V ±0.1 V
4.0 V ±0.1 V
1.2 V–2.0 V
1.2 V–2.0 V
1.2 V–2.0 V
1.2 V–2.0 V
1.2 V–2.0 V
RX
PLL-B
RX
PLL-B
RX
PLL-B
RX
PLL-B
Adjust
repeatedly
L702,
L703
C154
Verify
C222
C232
C242
C252
C262
C272
Verify
Verify
Verify
Verify
Verify