Kenwood TK-80 Service Manual page 51

TK-80
Item Condition
3. IF AMP 1) M CH: 08
adjustment [DATA]: 1 push
[MODE]: 1 push
Mode: USB
SSG f.: 14.151MHz
SSG OUT: –113~–119dBm
(0.501~0.25µV)
4. MIX BAL 1) M CH: 09
adjustment AIP: OFF
SSG OUT: OFF
5. IF GAIN 1) M CH: 10
adjustment SSG f.: 14.150MHz
SSG OUT: –103dBm (1.58µV)
2) SSG OUT: –113dBm (0.501µV)
3) SSG OUT: –103dBm (1.58µV)
6. S-meter 1) Power ON while holding the
adjustment [SCAN] and [DATA] keys.
S1 (Service adjustment mode)
Menu No.: 29
SSG f.: 14.101MHz
SSG OUT: –107dBm (1µV)
S9 2) Menu No.: 30
SSG OUT: –81dBm (19.9µV)
Full scale 3) Menu No.: 31
SSG OUT: –41dBm (1.99mV)
7. SQL 1) Menu No.: 32
threshold SSG OUT: OFF
adjustment SQL VR: Center
8. SQL VR 1) Menu No.: 33
adjustment SSG OUT: OFF
SQL VR: Center
9. CLARI VR 1) Menu No.: 34
adjustment SSG OUT: OFF
CRARI VR: Center
10. Beep sound 1) Menu No.: 37
adjustment
11. Sidetone 1) Menu No.: 38
adjustment
12. ROM data 1) Turn the [DIAL] to select Menu No. 39.
writing
13. NB check 1) Press [MENU] key one time,
set to the menu number "02" generator
by pressing [DATA] or [MODE] D.V.M
key, and NB is ON for turning
the [DIAL].
Adjust the noise generator to
S1, S9 level, then check.
After the check, press the
[MENU] key one time.
50
ADJUSTMENT
Measurement
Test-
Unit Terminal Unit
equipment
SSG Rear ANT TX-RX L44
panel
AF V.M EXT.SP
Oscilloscope
DM. SP
Front
panel
TX-RX VR4
Front
panel
TX-RX VR9
Display (READY) → Press [MODE] or [DATA] → Write → Finish (GOOD)
Noise
Adjustment
Parts Method
Repeat adjustment
L48 2 to 3 times.
L49 AF output: MAX
L51
L75
L76
VR1 Noise minimum
AF VOL AF output: 0.63V
AF output: 0.4V ± 0.05V
Check 0.63V± 0.05V
[MODE] 1 push
or
[DATA]
1 push
1 push
1 push
0.25V ± 6dB
VR10 0.2V ± 6dB
Check Noise decreases
Specifications/Remarks