Kenwood TK-8102H Service Manual page 30

TK-8102H
PCB Section
Item
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 (501 V)
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 R814, R888 (fuse), R823 and R807 (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 TC2.
Receiver Section
Item
1. Seisitivity 1) CH : RX low (Wide/Narrow)
CH : RX center (Wide/Narrow)
CH : RX high (Wide/Narrow)
2) SSG output
: –118dBm (0.28 V) (Wide)
: –116dBm (0.35 V) (Narrow)
Mod : 1kHz
Dev : 3.0kHz (Wide)
Dev : 1.5kHz (Narrow)
2. Squelch 9 1) CH : RX low (Wide)
CH : RX center (Wide/Narrow)
CH : RX high (Wide)
2) SSG output
: –113dBm (0.5 V) (Wide)
: –112dBm (0.56 V) (Narrow)
Mod : 1kHz
Dev : 3.0kHz (Wide)
Dev : 1.5kHz (Narrow)
3. Squelch 1 1) CH : RX low (Wide)
CH : RX center (Wide/Narrow)
CH : RX high (Wide)
2) SSG output
: –120dBm (0.22 V) (Wide)
: –119dBm (0.25 V) (Narrow)
Mod : 1kHz
Dev : 3.0kHz (Wide)
Dev : 1.5kHz (Narrow)
30
ADJUSTMENT
Condition
Test equipment
Digital voltmeter
SSG
Digital voltmeter
Tra generator
Spectrum analyzer
Condition
Test equipment
SSG
Oscilloscope
AF V.M
Distortion meter
Measurement
Terminal Parts
CV TC2
TC1
AFV L22
ANT TC3
BPF TC5
Measurement
Terminal Parts
ANT
EXT. SP
PC key
Adjustment
Specifications/
Method
5.5V 0.1V
5.5V 0.1V
Check 0.8V or more
3.2~3.3V (DC)
Adjust the BPF waveform
to Fig. 1
Fig. 1
Adjustment
Specifications/
Method
Check SINAD
: 12dB or higher
Adjust to open the squelch
Remarks
Remarks