Icom IC-R3 Service Manual

5 - 3
5-2 PLL ADJUSTMENT
“TV RECEIVING SYSTEM”, “REFERENCE FREQUENCY” AND “DETECTOR OUTPUT VOLTAGE” adjustments must be per-
formed at “ADJUSTMENT MODE”.
1ST VCO
LOCK
VOLTAGE
(SHIFT ON)
(SHIFT OFF)
2ND VCO
LOCK
VOLTAGE
CONVERTER
VCO LOCK
VOLTAGE
TV MODE
REFERENCE
FREQUENCY
TV
RECEIVING
SYSTEM
REFERENCE
FREQUENCY
DETECTOR
OUTPUT
VOLTAGE
ADJUSTMENT
ADJUSTMENT ADJUSTMENT CONDITION
MEASUREMENT
VALUE
POINT
UNIT LOCATION UNIT ADJUST
1
2
1
1
1
1
1
1
• Displayed frequency :
799.995 MHz
• Receiving
• Displayed frequency :
0.495 MHz
• Receiving
• Displayed frequency :
0.495 MHz
• Receiving
• Displayed frequency :
1150.000 MHz
• Receiving
• Displayed frequency :
97.45 MHz
• Mode :TV
• Connect an SSG to the antenna
connector and set as:
Level :
1 mV* (60 dBµ)
Modulation : OFF
• Receiving
• Displayed TV receiving system
adjustment menu (TV ch).
• Displayed frequency :
(FR ch) 1260.000 MHz
• Receiving
• Displayed frequency :
(TL ch) 30.100 MHz
• Connect an SSG to the antenna
connector and set as:
Level : 1 mV
* (60 dBµ)
Modulation : OFF
• Receiving
VCO
VCO
VCO
RF
DISPLAY
RF
RF
Connect the digital
multi-meter to the
check point CP1.
Connect the digital
multi-meter to the
check point CP2.
Connect the digital
multi-meter to the
check point CP3.
Connect the fre-
quency counter to
the check point
CP6.
Connect the fre-
quency counter to
the check point
CP5.
Connect the digital
multi-meter to the
check point CP1.
14.5 V
2.5 V
3.2 V – 5.2 V
0.8 V
2.5 V
4.5
1320.0000 MHz
1.0 V
VCO
VCO
VCO
RF
Top
panel
Top
panel
RF
L64
L63
Verify
L919
L902
[DIAL]
[DIAL]
L21
*This output level of the standard signal generator (SSG) is indicated as SSG’s open circuit.

Icom IC-R3 Specifications

General

Brand	Icom
Model	IC-R3
Category	Receiver
Language	English