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4-8 SCOPE UNIT ADJUSTMENTS
S3 LO LOCK
VOLTAGE
SCOPE
SCOPE GAIN
SCOPE
ATTENUATOR
ADJUSTMENT
ADJUSTMENT
ADJUSTMENT CONDITION
MEASUREMENT
VALUE
POINT
UNIT
LOCATION
UNIT
ADJUST
1
1
2
3
1
1
Pre-set the IC-7800 as the following
condition.
• MAIN display frequency
: 14.200 MHz
• Mode
: CW
• Dualwatch
: OFF
• Pre-amp.
: OFF
• Attenuator
: OFF
• Scope
: ON
• Scope attenuator: OFF
• Span
: ±25 kHz
• Receiving
• Connect an SSG to [ANT1] connec-
tor and set as;
Frequency : 14.200 MHz
Level
: 500 µV* (–53 dBm)
Modulation : OFF
• Receiving
• Connect an SSG to J1 and set as;
Frequency : 71.715 MHz
Level
: 100 mV* (–7 dBm)
Modulation : OFF
• Receiving
• Connect an SSG to [ANT1] connec-
tor and set as;
Frequency : 14.200 MHz
Level
: 500 µV* (–53 dBm)
Modulation : OFF
• Receiving
• MAIN display frequency
: 14.200 MHz
• Mode
: CW
• Connect an SSG to [ANT1] connec-
tor and set as;
Frequency : 14.200 MHz
Level
: 500 µV* (–53 dBm)
Modulation : OFF
• Receiving
• MAIN display frequency
: 14.200 MHz
• Mode
: CW
• Scope attenuator: 30 dB
• Connect an SSG to [ANT1] connec-
tor and set as;
Frequency : 14.200 MHz
Level
: 500 µV* (–53 dBm)
Modulation : OFF
• Receiving
SCOPE
Front
panel
Front
panel
Front
panel
Connect a digital volt-
meter to CP801.
Scope wave on the
LCD.
Scope wave on the
LCD.
Scope wave on the
LCD.
2.5 V
Maximum wave form
Minimum wave form
Maximum wave form
Set peak of scope
wave form to 6 scales
in the scope screen
Set peak of scope
wave form to 3 scales
in the scope screen.
SCOPE
SCOPE
SCOPE
SCOPE
C824
Adjust in
sequence
L203,
L202,
L201,
L5,
L6,
C41,
and
repeatedly
adjust L5,
L6 and
C41 in
sequence.
C41
Adjust
L5,
L6,
repeatedly.
R416
R11
*This output level of a standard signal generator (SSG) is indicated as SSG’s open circuit.
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 ...