Kenwood TK-378G, Service Manual

Page: 14 / 31

TK-378G
14
Common Section
Item Condition
Measurement Adjustment
Specifications/
Test equipment Terminal Parts Method
Remark
1. Setting 1) BATT terminal voltage:7.5V
2) SSG Standard modulation
[Wide] MOD:1kHz, DEV:3kHz
[Narrow] MOD:1kHz, DEV:1.5kHz
2. VCO lock 1) CH:RX High Power meter ANT TC2 ADJ 4.0V ± 0.1V
voltage 2) CH:RX Low DVM CV(LV) Check 0.8V or more
RX
TX 3) CH:TX High TC1 ADJ 4.0V ± 0.1V
PTT:ON
4) CH:TX Low Check 0.8V or more
PTT:ON
ADJUSTMENT
Transmitter Section
Item Condition
Measurement Adjustment
Specifications/
Test equipment Terminal Parts Method
Remark
1. Frequency 1) TEST CH:TX Center Freq. Counter ANT VR1 Center frequency
Adjust PTT:ON ± 100 Hz
2. High Power TEST CH: TX Low Power meter PC key 4.2W ± 0.1W
Check TX Low’ Am meter 2.2A or less
Adjust TX Center
(PC MODE) TX High’
TX High
Battery terminal voltage:7.5V
PTT:ON
3. Low Power TEST CH: TX Low 1.0W ± 0.1W
Adjust TX Low’ 1.0A or less
(PC MODE) TX Center
TX High’
TX High
Battery terminal voltage:7.5V
PTT:ON
4. Max DEV TEST CH: TX Low Deviation meter ANT 4.2kHz ±50Hz
Adjust TX Center Oscilloscope SP/MIC connector (According to
(PC MODE) TX High AG the ,-)
[Wide] AG:1kHz / 120mV AF VTVM
Deviation meter filter
LPF:15kHz
HPF:OFF
PTT:ON
[Narrow] TEST CH:TX Center 2.1kHz
PTT:ON (According to
the ,-)
5. External AG:20MHz (Square waves) /600mVpp Deviation meter ANT VR3 Make the
CTCSS Input Deviation meter filter Oscilloscope CN6(CT IN) demodulation
Balance LPF:15kHz AG waves into
Adjust HPF:OFF square waves.
M)151.0MHz
M4)143.0MHz
PTT:ON
6. QT TCXO TEST CH: TX Low Deviation meter ANT PC key
Balance TX Center Oscilloscope SP/MIC connector
(PC MODE) TX High AG
[240] (Wide/Narrow) AF VTVM
PTT:ON