Kenwood TK-80 Service Manual page 54

Item Condition
14. Power 1) M CH: 23
frequency Transmit
response
15. Spurious 1) M CH: 24
adjustment Transmit
16. Suppression 1) M CH: 25
adjustment Set USB/LSB using [MODE]
key.
Transmit
17. SWR 1) M CH: 26
protection 150Ω dummy load connect.
adjustment Transmit
18. SWR 3.0 1) Power ON while holding the
(for AT) [SCAN] and [DATA] keys.
adjustment (Service adjustment mode)
Menu No.: 24
150Ω dummy load connect.
Transmit
19. CAR point 1) Menu No.: 27 (LSB)
adjustment Menu No.: 28 (USB)
AG1: 300Hz/3mV
AG2: 2700Hz/3mV
Transmit
20. ROM data 1) Turn the [DIAL] to select Menu No. 39.
writing
21. Display 1) Menu No.: 36
check
22. Transmit 1) Check for following frequency Power meter Rear
output M CH: 28 (1.8MHz, AM)
power M CH: 31 (7MHz, CW)
M CH: 34 (26MHz, USB)
SSB: AG 1kHz, 50mV input
AM: Unmodulated
Transmit
Current
consumption
Spurious
(during
HI power)
ADJUSTMENT
Measurement
Test-
Unit Terminal Unit
equipment
Power meter Rear ANT Final
panel
Power meter TX-RX VR3
Spectrum
analyzer
Coupler
150Ω
dummy load
Pass-
through type
power meter Front
panel
Power meter
AG
Oscilloscope
Coupler
Display (READY) → Press [MODE] or [DATA] → Write → Finish (GOOD)
ANT
Spectrum panel
analyzer
AG
Linear Front MIC
detector panel
f. counter
Adjustment
Parts Method
VR3 Power maximum 95W or more
Spurious minimum –50dB or more
(Near ± 1.6MHz)
VR7 CAR level minimum –50dB or more
VR8 Repeat USB and
LSB alternately,
adjust CAR level to
minimum.
VR14 40W ± 4.0W
[MODE] 1 push
or
[DATA]
While observing the
oscilloscope wave-
forms, adjust so the
waveforms cross.
At LSB or USB,
adjust while pressing
[MODE] or [DATA]
key.
Check LCD all segments light.
Transmit output No display
power (RF meter
lights up all) HI
Press [MENU] key MID
one time, set to the
menu number "01" LOW
by pressing [DATA]
or [MODE] key.
Change to HI, MID, *( ): AM mode
LOW by turning the
[DIAL].
No display: 20.5A or less
HI: 15A or less
MID: 12A or less
LOW: 9A or less
Higher harmonic
Other: –40dB or less
TK-80
Specifications/Remarks
OK
NG
: 90~110W (20~30W)
: 45~55W (10~15W)
: 22~28W (5~8W)
: 13~17W (2~5W)
: –50dB or less
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