Adjustment Points - Kenwood TK-768 Service Manual

Item
Condition
Measurement
Adjustment
Specifications/Remarks
Test-
equipment Unit
Terminal Unit
Parts
Method
5 . M a x i m u m
deviation
1) Set : Panel tuning mode.
Tuning item : ,lL
C H : 2 - S i g : 1
AG : lkHzlSOmV
Deviation meter filter
LPF : 1 SkHz
H P F : O F F
De-emphasis : OFF
P T T : O N
Powermeter
Deviation
meter
0scilloscope
AF VTVM
Rear
panel
Front
panel
ANT
M t c
Front
panel
SCN
or
D/a
Key
Up/down for
L u r r r r g u o L o .
According to the
larger +, -.
+ 4 . 0 5 k H 2 Í 0 . 1 k H z
Oscilloscope waveform is
is not abnormal.
2) Tuning item
C H : 1 - S i g
P T T : O N
Lli
I
3) Tuning item : ïH
C H : 3 - S i g : 1
P T T : O N
6 . M t C
sensitivity
1) Set : Panel test mode,
C H : 1 - S i g : 1
AG : l kHzl5mV
Deviation meter filter
LPF : 1 SkHz
H P F : O F F
De-emphasis : OFF
P T T : O N
Check
Íz.z-!ó.YKnz
Oscilloscope waveform
is not abnormal.
lf you need to adjust,
you can adjust by VR401
on the TX-RX unit (B/2).
7. OT deviation 1 ) S e t : P a n e l t u n i n g m o d e .
Tuning item : 5
C H : 1 - S i g : 5
Deviatíon meter filter
LPF : 3kHz
HPF : 50Hz
P T T : O N
Front
panel
scN
or
D/A
Key
Up/down for
tuning data.
0.75kHz+50H2
B. DTMF
deviation
check
1) Set : Panel test mode.
C H : 1 - S i g : 9
Deviation meter filter
L P F : 1 S k H z
H P F : O F F
P T T : O N
Check +2.4-+3.7kqz
lf you need to adjust,
you can adjust by VR402
on the TX-RX unit (B/2).
TK:7681H
Adjustment Points
ADJUSTIVIENT
{
{
L205-208 : Sensitivity
VR401 : MIC sensitivity
VR402 : DTMF deviation
e
e
{
1208
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vco
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