Rf Unit - Icom IC-R7000 Service Manual

7-5 RF UNIT
•RF UNIT
IC
NJM4558D
IC1, IC2,
IC3, IC4 (LOW NOISE DUAL OPERATIONAL AMPLIFIER)
ICS
BA618
(LED DRIVER)
IC6 DM·88XA
(DOUBLE- BALANCED MIXER)
IC7
DM·251E
(DOUBLE-BALANCED MIXER)
TRANSISTORS
3SK121
01, 02, 03,
o~
G2
GATE1 G1
00~
'
DRAIN
2$8562
015
~
BASE
~OLLECTOR
EMITIER
2SC945
021
~
BASE
~OLLECTOR
EMITIER
·-EQ
c
~
E
2SC3355
05,06,07,08,016,017
c
ooc-•~
EMITIER E
BASE
3SK101
:d
018
GAT~E1 :~
GATE2 S
SOURCE
DRAIN
7-8
8 7 6 5
00
3 4
16 15 14 13 12 11 10
6GND
'"
2GND
LJ
c·~
7 CASE GND
3 AF
BOTIOM
RF RF GNO CASE GND
@• @'
O• 01
1 AF
5GND
02
GND
@•
O•
@•
IF
GND
LO
3
IF GND RF
2SK241
09
2SC2458
019
'~
s
GND LO
2SC3399
010, 011, 012, 013, 014
~~
COLLECTOR E
EMITIER
2SK30ATM
020
B~C' G~D
BASE
COLLECTOR DRAIN
EMITIER E GATE
SOURCE S