Kenwood TK-80 Service Manual page 53

Hf ssb radiotelephone
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TK-80
Item
Condition
6. ROM data
1) Turn the [DIAL] to select Menu No. 39.
writing
7. Idle current
1) M CH: 11
adjustment
VR1, VR2
: MAX to counterclockwise
Transmit
8. Fan operation
check
9. NULL
1) Insert the coaxial cable to CN19. D.V.M
adjustment
M CH: 12
VR3: MAX to counterclockwise Power meter Rear
Low power
Transmit
10. Power
1) Power ON while holding the
adjustment
[SCAN] and [DATA] keys.
100W
(Service adjustment mode)
Menu No.: 01
Transmit
50W
2) Menu No.: 02
Transmit
25W
3) Menu No.: 03
Transmit
15W
4) Menu No.: 04
Transmit
12.5W
5) Menu No.: 05
Transmit
10W
6) Menu No.: 06
Transmit
6.25W
7) Menu No.: 07
Transmit
3.75W
8) Menu No.: 08
Transmit
RF meter data is also written
at the same time as the
above power adjustment.
11. SSB
1) Menu No.: 18
microphone
AG: 1kHz/5mV
sensitivity
Transmit
adjustment
12. AM
1) Menu No.: 19
microphone
Transmit
sensitivity
adjustment
13. ROM data
1) Turn the [DIAL] to select Menu No. 39.
writing
52
ADJUSTMENT
Measurement
Test-
Unit
Terminal
Unit
equipment
Display (READY) → Press [MODE] or [DATA] → Write → Finish (GOOD)
DC
ammeter
Final
Final
Final
CN104
Final
ANT
panel
Power meter Rear
ANT
Front
panel
panel
Power meter Rear
ANT
panel
AG
Front
MIC
AF V.M
panel
Display (READY) → Press [MODE] or [DATA] → Write → Finish (GOOD)
Adjustment
Parts
Method
Check the default
current (I
).
0
VR1
I
+250mA=I
0
1
VR2
I
+250mA
1
TH1
Both ends of TH1
Fan starts running, and
are shorted.
ventilate to rear panel.
TC1
Voltage minimum
Reference value: 50mV
[MODE] 100W
± 5.0W
or
[DATA]
50W
± 3.0W
25W
± 2.5W
15W
± 1.5W
12.5W
± 1.0W
10W
± 1.0W
6.25W
± 0.5W
3.75W
± 0.5W
60W
± 5.0W
Set the value, multi-
plying SSB micro-
phone sensitivity
adjustment value by
the square root of 2.
Specifications/Remarks

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