Kenwood TK-190 Service Manual page 41

ADJUSTMENT
Measurement
Item Condition
Test-
equipment
3. BPF coil Tracking
generator
Spectrum TX-RX TP3
analyzer
4. MCF 1) Set panel test mode Tracking
adjustment CH No. : 1 generator
Signalling No. : 1
Use this Spectrum TX-RX TP11
adjustment analyzer
procedure
after replace-
ing any of
the MCF
coils.
5. Sensitivity 1) Set panel test mode SSG
adjustment CH No. : 3
and check Signalling No. : 1 AF VTVM Side
Select SNS ∗ ∗ ∗
Oscilloscope
in panel tuning mode Distortion
Push Monitor to 3 point meter
adjustment mode Audio
Select SNS ∗ ∗ ∗
analyzer
L
SSG freq. : Low
output : –116dBm/0.35µV
2) Push Tone2 to select
SNS ∗ ∗ ∗
M
SSG freq. : Center
3) Push Tone2 to select
SNS ∗ ∗ ∗
H
SSG freq. : Hi
6. Tight 1) Set panel test mode
squelch CH No. : 3
adjustment Signalling No. : 1
Select SQ T ∗ ∗ ∗
in panel tuning mode
SSG output : 6dB above to
12dB SINAD level
TK-190
Adjustment
Specifications/Remarks
Unit Terminal Unit Parts Method
Panel ANT TX-RX L201
L202
L206
Fig. 1 :K2
Panel TP10 TX-RX L302 Adjust the coil so that it becomes the Spectrum
L303 waveform shown in Fig. 2.
L304
REF -64.0 dBm ATT10dB
2dB/
TG LEVEL
-25 dBm
RBW
1 kHz
VBW
1 kHz
SWP
500 ms
CENTER 128.55000 MHz
Fig. 2
Panel ANT Panel TOP1/ Adjust for maximum 12dB SINAD or more
TOP2 SINAD
Universal
Adjust to point of
opening squelch
TK-190
Item Condition
7. Squelch 1) Set panel test mode
adjustment CH No. : 3
Signalling No. : 1
Select SQ O ∗ ∗ ∗
in panel tuning mode
SSG output : 3dB below to
12dB SINAD level
8. Squelch 1) Set panel test mode
check CH No. : 3
Signalling No. : 1
SSG output : –118dBm/0.28µV
2) SSG output : –127dBm
A_write B_blank
MKR
15.00 kHz
0.749 dB
Adjustment Point
Foil side
L201
SPAN 50.0 kHz
L304
L303
41
ADJUSTMENT
Measurement Adjustment
Test-
Unit Terminal Unit Parts
equipment
SSG Panel ANT Panel TOP1/ Adjust to point of
TOP2
AF VTVM Side Universal
Oscilloscope
Distortion
meter
analyzer
Component side
L202
E
TP3
L206
L302
E
L800
TP1
Specifications/Remarks
Method
opening squelch
Check Squelch must be opened
Squelch must be closed
E
E
E
TP7
TP10
TP11
IC607
IC603
TP6
TP2
TP4
E
TP5
42