Kenwood NX-411 Service Manual page 84

AY
NX-411
SCHEMATIC DIAGRAM
C579
100p
R : 4.57V
T : 4.67V
C576
Q509
2p
2SC5636
C574
R : 0.46V
4p
T : 0.47V
R : 1.13V
T : 1.21V
BUFFER AMP (VCO)
Q801
BUFFER AMP
(2nd LOCAL)
50R
R : 4.12V
T 0.11V :
C815
L802
100p
560n
R812 C813 L803
47n
330k 10p
C811 R811
7p 0
Q801
2SC5636
R : 0.73V
T 0V :
CF801
R : 3.52V
L72-1017-05
T 0V :
oUT IN
R808 C825
4.7k 0.1u
R809
10k
C805
0.1u
L801 C826
27u
C806
0.1u
0.1u
C807
0.1u
R : 3.75V
C827
T 0V :
10p
7
33C
84
X57-812 (A/2) 10/11
AZ
R : 0V
T : 1.36V
L618
8.2n
L521
10n
BUFFER AMP
(VCO)
R : 1.75V
T : 1.88V
C578
L529
2SC5636
3p
1.0n L522 C582
10n
100p
R
T
50C
C817 C833
10p 2p
IF IC
IC802
TK10931VTL-G
C834
1 24
oSC(B)
RFINPUT
0.01u
2 23
oSC(E)
GND
3 22
MIXoUTPUT
CoMPoUTPUT
4 R : 1.89V 21
VCC
CoMPINPUT
T 0V :
5 20
AMIFINPUT NoISEAMPoUTPUT
6 19
AMIFDECoUPLINING NoISEAMPINPUT
7 18
FMIFINPUT AMAGCINPUT
8 17
FMIFDECoUPLING1 AGCAMPoUTPUT
9 16
FMIFDECoUPLING2 RFAGCoUTPUT
10 15
LIMoUTPUT RSSIoUTPUT
11 14
QUADINPUT AMSW
13
12
FMDEToUTPUT
AMDEToUTPUT
7
BA
BUFFER AMP (TX)
R : 0V
Q601
T 0.96V :
2SK3077F
L601
5.6n
BUFFER AMP (TX)
R676
3.9k
Q610
2SC5636
50T
R : 4.58V
T : 4.57V
R584
R582 R571 R585
Q510
0 0 0
0
: 1.14V
: 1.19V
50R
R : 4.68V
R : 0.75V
T : 0.26V
T : 0.24V
R835 R838
0 560k C836 R834
0.01u 220 OUT
Q802
2SC5108(Y)F
R822
100k IF AMP
C830
0.1u
R820
270k
R830
C828 0.1u 10k
R840
R823 10k
10k
R824 4.7k
C829 0.1u
R825 22k
R829
12k
R826
10k
33C
BB
TX-RX UNIT (X57-8120-10) (A/2)
L604 L620
C624 C629
R621
6.8n 1.5n
3p 100p
12
R612
3.3k
50T
D601
RN142S
C592
D513,601
TX/RX
1.5p
RF SWITCH
R : 0V
T : 4.94V
R : 2.41V
T : 0V
XF801
L71-0640-05
L808 L810
180n 100n
IN C848 C851
0.01u 0.01u
OP AMP
(RF CONTROL)
5 4
IN+B VSS
6 3
IN-B IN+A
7 2
oUTB IN-A
8 1
VDD oUTA
IC803
TC75W51FK(F)
7
BC
7
7
L812
12n
C855
1p
7
7