Kenwood TK-2000, Service Manual

Page: 34 / 40

TK-2000
34
LEVEL DIAGRAM
T
o
mak
e measurements in the AF section, connect the A
C
le
v
el meter
.
(ANT input:
–53dBm,1kHz FM, 1.5kHz De
v (Narro
w).)
In the RF section, use a high impedance probe
. (ANT input:
–53dBm, MOD off).
A
G
is set to the MIC input becomes 1.5kHz De
v,
at 1kHz MOD
. (Narro
w)
T
o
mak
e measurements in the AF section, connect the A
C
le
v
el meter
.
In the RF section, use a 1000pF coupling capacitor
.
Receiver Section T
ransmitter Section
FM IF
SYSTEM
DAC
SG
–53dBm
50
Ω
ANT
–58.0dBm
–74.8dBm
–67.6dBm
–55.0dBm
–52.6dBm
–47.5dBm
–60.8dBm
–33.47dBm
174mV
rms
71mV
rms
1.9V
rms
1.9V
rms
1.9V
rms
C250
C247
C240
C237
C224
C221
C216
C328
C320
C302
SP
500mW
Q306
Q302
IC302
IC300
IC200
Q202
XF200
MIXER
Q203
Q204
RF (CENTER FREQUENCY)
IF1 (38.85MHz)
IF2
450kHz
AF (1kHz)
IC300
DAC
AF
AMP
C29
–11.2dBm
VCO
C33
5.2dBm
C42
2.2dBm
3.0dBm
C112
18.5dBm
C127
36.2dBm
ANT
50
Ω
MIC
15.1mV
rms
216mV
rms
38.2dBm
C100
11.8dBm
C108
Q5
Q6
RXLo
D200
D100
Q100
Q101
Q102
AF (1kHz)
RF (CENTER FREQUENCY)
R313
Q4
+