Kenwood TK-2000, Service Manual

Page: 21 / 40

TK-2000
21
ADJUSTMENT
Common Section
Item Condition
Measurement Adjustment
Specifi cations / Remarks
Test-
equipment
Unit Terminal Unit Parts Method
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
Voltage
1) Adj item: High Power
meter TX-RX ANT
(CV)
FPU 4.0V ±0.1V
Transmitter Section
Item Condition
Measurement Adjustment
Specifi cations / Remarks
Test-
equipment
Unit Terminal Unit Parts Method
1. Frequency 1) Adj item: High
Press [Transmit] button. f. counter TX-RX ANT FPU 173.900MHz ±50Hz
2. High
Transmit
Power
and
Protective
Current
*Note
1) Adj item: Low, Center, High
(3
points)
BATT terminal voltage: 7.5V
Press [Transmit] button.
Power
meter
Ammeter FPU 4.8W ±0.1W
2.0A or less
3. Low
Transmit
Power 1) Adj item: Low, Center, High
(3
points)
BATT terminal voltage: 7.5V
Press [Transmit] button.
1.0W ±0.1W
1.0A or less
4. DQT
Balance
[Wide] 1) Adj item: Low, Center, High
(3
points)
(Signaling Square Wave)
Deviation meter fi lter
LPF: 3kHz
HPF: OFF
Press [Transmit] button.
Power
meter
Deviation
meter
Oscilloscope
AG
AF VM TX-RX ANT
SP/MIC
connector
FPU Make the modulation
wave into square
waves.
5. Maximum
Deviation
[Wide] 1) Adj item: Center, Low, High
(3
points)
AG: 1kHz/150mV
Deviation meter fi lter
LPF: 15kHz
HPF: OFF
Press [Transmit] button.
4.0kHz
(According to
the lager +, –) ±100Hz
6. Battery
Warning
Level 1) BATT terminal voltage: 5.9V DVM TX-RX BATT
terminal
FPU Write BATT terminal voltage: 5.9V
7. Battery
Detection
Check
(User mode)
1) BATT terminal voltage: 5.7V
PTT:
ON
Power
meter
DVM ANT
BATT
terminal Check LED blinks
No transmit power
2) BATT terminal voltage: 7.5V
PTT:
ON
LED does not blink
• It is not necessary to adjust the fi xed values for the DTMF-DEV, DQT-DEV, QT-DEV, and MIC sensitivity.
• The TX-DEV Narrow setting uses the Wide calculated adjustment level value.
*Note: Please do not adjust High Transmit power without connecting TX Power meter or 50 ohm dummy load to the ANT terminal.