Kenwood NX-300 Service Manual page 154

BI
NX-300
TH600
100k
THP
-t °
CN600 CN601
R : 4.75V
BUFFER AMP T : 4.8V
R : 1.81V
50T
T : 1.89V
Q600
2SC5636
C603
TX
R : 1.48V
T : 1.36V
10p
R608
50C
47
+B
33C
3
19.2M
R : 4.849V
L701 T : 5mV
560n
C708
R : 0.731V
100p
T : 3.6mV
L703
R702 C706
47n
330k 10p
R571
C700 0
7p
Q700
2SC5108(Y)F
2nd LOCAL
TRIPLER
CF700
450kHz
OUT
R703
10
C709
0.1u
L902
C710
0.1u
27u
C711
0.1u
C814
R709
27p
R714
10
R705
0
50R
50IF
4
150C
154
X57-737 (A/2) 3/4
BJ
SCHEMATIC DIAGRAM /
PRE-DRIVE AMP
R : 2.5mV
Q601
LOCAL SWITCH T : 2.37V
2SC5636
D601
C607 R613
7p 0
HSC277
D600
LOCAL
SWITCH APC PROTECT
R635
560
R : 63mV
T : 128mV
R : 3.274V
T : 11.2mV
R : 0.65V
Q604
T : 140mV
R629
2SC5383-T111
27k
APC SWITCH
R : 61mV
T : 110mV
APC
SWITCH
APC SWITCH
R : 3.294V
T : 40mV
SSM3K15TE(F)
/APCSW
C705
4.7u
C704 C715 C714
1000p
10p 47p
FM IC
IC701
TK10931VTL-G
R : 2.66V
T : -0.8V
1
oSC(B)
2
oSC(E)
C790
IN 3
MIXoUTPUT
0.1u
4
CoMPoUTPUT
VCC
C718
5
AMIFINPUT
NoISEAMPoUTPUT
0.1u
6
AMIFDECoUPLING
NoISEAMPINPUT
C721
7
FMIFINPUT AMAGCINPUT
0.1u
AGCAMPoUTPUT
8
FMIFDECoUPLING1
9 RFAGCoUTPUT
FMIFDECoUPLING2
C720 10
RSSIoUTPUT
LIMoUTPUT
10p
11
QUADINPUT
10k 12
FMDEToUTPUT AMDEToUTPUT
CF701
450kHz
OUT
R796 C727
0 0.1u
IC700
MCP6021-E/OT
BUFFER
BK
原理图
DRIVE AMP
Q602
2SK3077F
R : 5mV
T : 0.99V
C613 C671 C615
4p 10p 470p
H : 4.65V
L : 4.64V
R658
820
R654
270k
C641
10p
R648
150k
R649
150k
Q605 R : 13mV
T : 3.71V
R : 4.694V
T : 5mV
C730
24
RFINPUT
23 0.01u
GND
22
IF AMP
R724 100k
21
CoMPINPUT
20
C728 0.1u
R719
19
270k
18
17 C760 0.1u
R721 10k
16
R722 4.7k
15
C759 0.1u
14
AMSW
R725 22k
13
CN700
R726
18k
R : 2.03V
T : 85mV
C792 R727
IN
0.1u 2.2k
R : 1.81V
T : -100mV
BL
TX-RX UNIT (X57-7370-11) (A/2)
C621
R628 R620 C670
4p
0 5.6 470p
R624
33k R627
0
H : 0.99V
L : 0.78V
R655 R659
10k 470k
IC600
TA75W01FUF
1 8
oUT1 VCC
Q610
2 7
IN1- oUT-B
EMD5
3 6
IN1+ IN2-
APC SWITCH
4 5
VEE IN2+
AUTO POWER
CONTROL
R : 7.11V
T : 1.52V
Q608
Q607
2SK1824-A
R657
RT1N441U-T111
APC
0
APC SWITCH
SWITCH
R : 18mV
T : 3.92V R : 1.59V
T : 1.52V
R : 0.697V
R733 XF700
T : 3.6mV
58.05MHz
560k
OUT
C734 R737
IN
Q701 0.01u 220 0.01u
2SC4215-F(Y)
CN701
VAGC
R731
10k
RSSI
OP AMP
(RSSI/VAGC)
IC404
TC75W51FUF
R795
10k
5 4
IN+B VSS
6 3
IN-B IN+A
7 2
oUTB IN-A
8 1
VDD oUTA
R794
10k
BM
L605
12n
TX
50T
+B
1st LO
50R
C740 R739
RX
220
4
150C