Icom IC-7851 Servise Manual page 28

• RX ADJUSTMENTS (continued)
ADJUSTMENT
MAIN 1 1) Push [F-3] (Gain A) several times until "Total Gain A 50M
50 MHz RX sensitivity
[ Total Gain A 50M 2) Set the SSG as:
PRE OFF ref]
3) Rotate L2506 to adjust the voltage.
4) Push [F-3] (Exit).
SUB 1 1) Push [F-4] (Gain B) several times until "Total Gain B 50M
50 MHz RX sensitivity
[ Total Gain B 50M 2) Set the SSG as:
PRE OFF ref]
3) Rotate L2506 to adjust the voltage.
4) Push [F-3] (Exit).
• ADJUSTMENT POINTS ON THE RF-A/RF-B UNIT
CP2201
L3112 L3122
L3132
C3805
OPERATION
PRE OFF ref" appears.
• Frequency: 50.1515 MHz
• Level: –10 dBµ
• Returns to the RX adjustment menu.
PRE OFF ref" appears.
• Frequency: 50.1515 MHz
• Level: –10 dBµ
• Returns to the RX adjustment menu.
L2101
MP2501
J3141
J3142
MP2051
J3144
J3143
MP3301
CP2201
L3112 L3122
C3805
RL2051
RL2004 RL2003
L2101
MP2501
J3141
J3142
MP2051
RL2004 RL2003
J3144
J3143
MP3301
L3132
3-15
ADJUSTMENT
ITEM
L2506
(RF-A UNIT)
L2506
(RF-B UNIT)
RL2051
VALUE
Maximum
audio level.
Maximum
audio level.