Icom IC-7800 Service Manual Addendum page 383

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