KENWOOD TK378G
Manual de Servicio

TK-378G
ADJUSTMENT
Common Section
Item 1. Setting Condition 1) BATT terminal voltage:7.5V 2) SSG Standard modulation [Wide] MOD:1kHz, DEV:3kHz 2. VCO lock voltage RX TX [Narrow] MOD:1kHz, DEV:1.5kHz 1) CH:RX High Power meter 2) CH:RX Low DVM 3) CH:TX High PTT:ON 4) CH:TX Low PTT:ON ANT CV(LV) TC2 ADJ Check ADJ Check 4.0V ± 0.1V 0.8V or more 4.0V ± 0.1V 0.8V or more Measurement Test equipment Terminal Adjustment Parts Method Specifications/ Remark

TC1

Transmitter Section
Item Condition Measurement Test equipment Terminal Freq. Counter Power meter Am meter ANT VR1 PC key Adjustment Parts Method Center frequency ± 100 Hz 4.2W ± 0.1W 2.2A or less Specifications/ Remark 1. Frequency 1) TEST CH:TX Center Adjust PTT:ON 2. High Power TEST CH: TX Low Check TX Low� Adjust TX Center (PC MODE) TX High� TX High Battery terminal voltage:7.5V PTT:ON 3. Low Power TEST CH: TX Low Adjust TX Low� (PC MODE) TX Center TX High� TX High Battery terminal voltage:7.5V PTT:ON 4. Max DEV TEST CH: TX Low Adjust TX Center (PC MODE) TX High [Wide] AG:1kHz / 120mV Deviation meter filter LPF:15kHz HPF:OFF PTT:ON [Narrow] TEST CH:TX Center PTT:ON 5. External CTCSS Input Balance Adjust AG:20MHz (Square waves) /600mVpp Deviation meter filter LPF:15kHz HPF:OFF M)151.0MHz M4)143.0MHz PTT:ON 6. QT TCXO TEST CH: TX Low Balance TX Center (PC MODE) TX High [240] (Wide/Narrow) PTT:ON

1.0W ± 0.1W 1.0A or less

Deviation meter Oscilloscope AG AF VTVM

ANT SP/MIC connector

4.2kHz (According to the larger +,-)

±50Hz

Deviation meter Oscilloscope AG

ANT CN6(CT IN)

VR3

2.1kHz (According to the larger+,-) Make the demodulation waves into square waves.

Deviation meter Oscilloscope AG AF VTVM

ANT SP/MIC connector

PC key

14