Kenwood TK-390 Service Manual page 47

TK-390
Item Condition
22. BATT 1) Set panel test mode
detection CH No. : 3
check Signalling No. : 1
BATT terminal voltage : 5.7V
PTT : ON
2) BATT terminal voltage : 6.5V
PTT : ON
Receiver Section
Item Condition
1. AF level 1) Set panel test mode
check CH No. : 3
Signalling No. : 1
SSG freq. : Each freq.
output : –53dBm/501µV
MOD. : 1kHz
DEV. : 3kHz
2) Turn the toggle SW to the
right (narrow)
SSG freq. : Each freq.
output : –53dBm/501µV
MOD. : 1kHz
DEV. : 1.5kHz
2. Hum and 1) Set panel test mode
noise ratio CH No. : 3
check Signalling No. : 1
SSG output : –53dBm/501µV
2) Turn the toggle SW to the
right (narrow)
SSG output : –53dBm/501µV
3. BPF coil 1) Set panel test mode
CH No. : 2
Use this Connect the spectrum
adjustment analyzer to TP3.
procedure Signalling No. : 1
after replace- Push Orange to 3 point
ing any of adjustment mode
the BPF Select SNS 25
coils L
46
Measurement
Test-
Unit Terminal Unit
equipment
Power meter Panel ANT
DC VTVM Bottom BATT
terminal
Measurement
Test-
Unit Terminal Unit
equipment
SSG Panel ANT
AF VTVM Side Universal
Oscilloscope
Distortion
meter
Audio
analyzer
Tracking Panel ANT TX-RX L205
generator
Spectrum TX-RX TP3
analyzer
Adjustment
Parts Method
Check Cannot transmit
LED (TX) blinks
Transmit
Adjustment
Parts Method
Check 0.63V± 0.3V
3% or less
0.63V± 0.3V
5% or less
42dB or more
37dBm
Adjust the BPF coil so that the waveform is peaked.
L210 The frequency with the peak waveform does not
have to be the center frequency.
After finished peaking the waveform, perform a
3 point adjustment and set for maximum sensitivity.
RX BPF 0-10
REF –10.0dBm ATT 10dB
10dB/
Center
TG LEVEL
–30dBm
RBW
300kHz
VBW
10kHz
SWP
70ms
CENTER 470.0MHz
Specifications/Remarks
Specifications/Remarks
A write B blank
MKR
443.6MHz
–31.07dBm
Hi
Low
SPAN 100.0MHz