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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
Summary of Contents for IC-7800
Page 1: ...SERVICE MANUAL ADDENDUM CONTENTS PARTS LIST 1 BOARD LAYOUTS 65 VOLTAGE DIAGRAM 67 Dec 2009 ...
Page 79: ...SERVICE MANUAL ADDENDUM CONTENTS PARTS LIST 1 BOARD LAYOUTS 60 VOLTAGE DIAGRAM 64 Feb 2009 ...
Page 157: ...SERVICE MANUAL ADDENDUM CONTENTS PARTS LIST 1 BOARD LAYOUTS 57 VOLTAGE DIAGRAM 59 Aug 2008 ...
Page 245: ...SERVICE MANUAL ADDENDUM CONTENTS PARTS LIST 1 BOARD LAYOUTS 57 VOLTAGE DIAGRAM 59 Jul 2008 ...
Page 333: ...THE TRANSCEIVER i7800 SERVICE MANUAL S 14015HZ C1 2 Mar 2006 ...
Page 555: ...1 1 32 Kamiminami Hirano ku Osaka 547 0003 Japan S 14015HZ C1 2 C 2004 2006 Icom Inc ...