Kenwood TK-7102H Service Manual page 31

Test Frequency (MHz)
K,M
Channel
TX
1 : Center 160.100
2 : Low 146.100
3 : High 173.900
4 160.000
5 160.200
6 160.400
PCB Section
Item Condition
1. Setting 1) Power supply voltage
DC Power supply terminal : 13.6V
2. VCO lock 1) CH : TX high
voltage*
2) CH : RX high
3) CH : TX low
4) CH : RX low
3. IF coil 1) CH : RX center (Wide)
2) SSG output : –53dBm (501µV)
Mod : 1kHz
Dev : 3kHz
4. RF 1) CH : RX center (Wide)
bandpass CH : RX low (Wide)
filter CH : RX high (Wide)
2) Tra generator output : –30dBm
Connect the spectrum analyzer
to BPF terminal
* Adjustment of TX VCO lock voltage
1. Remove R516, F501, R518 and R524 (all on component side).
2. Remove PCB from chassis.
3. Transmit and check voltage at [CV] point.
Warning : Do not transmit if step "1." is not complete.
4. Adjust of voltage can be done by tuning TC402.
ADJUSTMENT
K2,M2
RX TX
160.050 149.100 149.050
146.050 136.100 136.050
173.950 161.900 161.950
160.000 149.000 149.000
160.200 149.200 149.200
160.400 149.400 149.400
Measurement
Test equipment
Digital voltmeter
SSG
Digital voltmeter
Tra generator
Spectrum analyzer
K,M
RX
Adjustment
Terminal Parts
CV TC402 5.5V
TC401 5.5V
Check
AFV L301 3.25~3.35V (DC)
ANT TC351 Adjust the BPF waveform
BPF TC352 to Fig. 1
K2,M2
Fig. 1
TK-7102H
Specifications/
Method Remarks
± 0.1V
± 0.1V
0.7V or more
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