Kenwood TK-378G, Service Manual

Page: 27 / 31

35 36
To
make measurements in the AF section, con-
nect the AC level meter
. (ANT input : -53dBm,
1kHz FM, 3kHz DEV(WIDE).) In the RF section, use a 1000pF coupling capaci- tor
. (The display shows the SSG input value re-
quired to obtain 12dB SINAD Without Local Level.) AG is set to the MIC input becomes 3kHz DEV
.
at 1kHz MOD. (WIDE) To
make measurements in the AF section, con-
nect the AC level meter
.
In the RF section, use a 1000pF coupling capaci- tor
.
TK-378G TK-378G
FM IF
SYSTEM
C309
Q301
–120dBm
–118.5dBm
–105dBm
–108dBm
–112dBm
–110dBm
–100dBm
170mV
rms
470mV
rms
Q22
C131
C242
IC16
5
4
3
41
IC14
IC11
SP
350mV
rms
230mV
rms
500mV
rms
17mV
rms
0.36mV
rms
-13.6dBm
IC17 DAC
12
13
ALC
COMP
SW
IDC
6
98
19
18
15
16
C243
10.5mV
rms
9mV
rms
30mV
rms
275mV
rms
268mV
rms
260mV
rms
350mV
rms
172mV
rms
MIC
IC14
Q6
+17.5dBm
C327
-3.7dBm
RF (460.05MHz)
IF1 (49.95MHz)
IF2 (450kHz)
AF (1kHz)
IC15 AF VR
C206
C239
Q4
Q2
C30
Q3
C246
C27
C14
AF (1kHz)
RF (460.05MHz)
VCO
RXLO
D10
D5
-1.2dBm
C12
Power Module
4.0W
RF (460.05MHz)
AF (1kHz)
RX
TX
C304
Q5
+8.3dBm
C11
+
C173
Q30
+
IC4
Local Level
67
41
0
35
D6
67
Q19
KNB-15A CIRCUIT DIAGRAM SPECIFICATIONS
Voltage : 7.2V (1.2V x 6)
Charging current : 1100mAh
Dimensions : 60.8W x 110.8H x 20.3D (mm)
(projections included)
Charger and charging time:
KSC-15 (normal charger), approximately 8 hours
KSC-16 (rapid charger), approximately 2 hours
Weight
: 210g
Discharge pin side
Breaker
(80 ± 5 ° C)
Charge pin side
Thermistor
Diode
Breaker
(70 ± 5 ° C)
KNB-14 CIRCUIT DIAGRAM SPECIFICATIONS
Voltage : 7.2V (1.2V x 6)
Charging current : 600mAh
Dimensions : 60.8W x 110.8H x 17.3D (mm)
(projections included)
Charger and charging time:
KSC-15 (normal charger), approximately 8 hours
KSC-16 (rapid charger), approximately 1 hour
Weight
: 165g
Discharge pin side
Breaker
(80 ± 5
°
C)
Charge pin side
Thermistor
Diode
Breaker
(70 ± 5 ° C)
LEVEL DIAGRAM /
电平图 KNB-14/KNB-15A (Ni-Cd BATTERY)