Kenwood TK-3107 Service Manual page 14

K
TK-3107
T:4.8V
RF SW
D100 C106
HSC277 470p
Q101
2SC5108(Y)F
TX PRE-DRIVE
RF SW
B
2nd Local
5R
5T
R:4.9V
R200
10
R201
1k
R202
390k
5R
AF
5MS
BUSY
B
APC
TXD
PTT
MIC AMP/LIMITER
IC500
R524
NJM2100V-ZB
51k
5
V-
C516
6
10p 7
8
V+
C518
R525
1.5k
0.022u(J)
MUTE
AFCO
RX
SB
TO AF AMP
14
X57-603 3/4
L
SCHEMATIC DIAGRAM
C108 R112
7p 1.5k
Q102
2SC4988-E
TX DRIVE
T:1.0V
CF200
L72-0958-05
R:4.2V OUT IN R:3.7V
2nd IF 450kHz
C205
330p
R:3.9V
C206
330p
IF SYSTEM
IC200
TA31136FNG
R:1.1V
R:1.0V
C210 C212
0.01u
33p
R207
100k
Q504
DTA143ZE
4
DC SW
3
2 C520
1 0.022u(J)
AGC
DETECT
1SS372F
M
T:0.5V
C111 R115 C114 R120
6p 10 470p 0
T:0.5V
APC
Q110
RT1N140U-T111
TEMPERATURE
PROTECTION SW
B
5R
2nd LOCAL
38.4MHz
1st IF 38.85MHz
IF AMP
XF201
Q201
R:0.7V
L71-0522-05
2SC4649(N,P)
R210 C214 OUT IN
470 0.01u
DC SW
Q200
RT1P141U-T111
B
APC
TXD
PTT
C524
0.027u(J)
MIC MUTE
/AGC SW
D500 D501
DAN222
R530
R532
100
820
N
TX-RX UNIT(X57-6030-10)
TX DRIVE
T:7.1V
Q105
L119
RFM01U7P C119 R127
2.2n
1000p 0
T:0.9V
R155
0
R:4.9V
TP2
R:4.9V
MIXER
R239 C267 R240 R240
Q202
3SK318
270 47p 0 0
D
G2
S
G1
R:0.6V
R226
560
C218
470p
R:5.1V
T:5.1V
C525 L500
0.1u
MIC MUTE
/AGC
Q503
2SC4919
O
5T
APC
T:7.4V
B
C264
22p
5R
5MS
B
APC
TXD
PTT
AFCO
SB
TO AF AMP