Kenwood TS-590SG Service Manual page 152

A B
TX-RX UNIT
(XC1-024X-XX)(A/2)
CN650
7.72V
TX-RX UNIT (XC1-024X-XX)(B/2)
C D
TX-RX UNIT
(XC1-024X-XX)(A/2)
CN674
L662
1000u
NB AMP2
6.51V
6.90V
R658
100
Q652
Q653
2SC3356-A(R25 2SC3356-A(R25
2.80V 2.48V
1STIF
NB AMP1 H:0V
L:6.89V
1.77V
1STIF
H:0.66V
L:0V
L654 C638
C654
C651
L652
0.22u
1000p 47p 1000p
47u
(CH)
Q654
6.48V
1.54V
SWITCHING
Q651
0.81V
2SC3356-A(R25 (NB AMPLIFIER 2)
Q651-653
AMPLIFIER
NB 10M/11M SW
Q654,Q665,Q668
1STIF:H 10.695MHz
1STIF:L 11.374MHz
E F
6.81V
L653 L664
NB AMP3
6.34V
R668
Q663 Q664 100
2SC3356-A(R25 2SC3356-A(R25
R692 22 2.91V
1STIF
H:0V
3.02V
L:6.89V
2.22V
1STIF
Q665
H:0.66V
Q654 2SC4617(R)
L:0V
2SC4617(R)
L663
R656
47u
47k R671
22k
Q665
Q663,664
AMPLIFIER SWITCHING
(NB AMPLIFIER 3)
NBL
IBK
G H
TS-590SG/590DG/590VG
Q668
SWITCHING
(NB AMPLIFIER 4)
BLNK
1STIF
CN668
NB8(+8) 1STIF
NB BUFFER
Q666,667
6.64V
AMPLIFIER R685
56k
NB AMP4
Q670
2SC4617(R)
L665
C681
R684
10p(CH) 1k
4.97V
Q670
BUFFER
6.96V
1STIF
H:0V
L:6.99V 4.38V
1STIF
H:0.68V
1.27V L:0V
D662
0.63V
RB706F-40
C684
R674
0.01u
10k
D662
3.81V
DETECTION
1.26V
Q667
2SK1824-A
Q669,671
R678
SWITCHING
1.5k
(NOISE BLANKER)
1.24V 7.27V
Q669
2SC4617(R)
1.96V
CN669
NBL1
CN673
NBL2
I
APPENDIX
(SCHEMATIC DIAGRAM XC1-024 B/2)
1
2
3
7.28V
4
Q671
LTA014EEBFS8
CN670
BLNK
D663,664
REVERSE CURRENT
PREVENTION
5
6