Kenwood TK-480 Service Manual page 21

TK-480
Common Section
Item Condition
1. Setting 1) BATT terminal voltage : 7.5V
Standard modulation
MOD : 1kHz
DEV : ± 3kHz
2. VCO lock 1) SYS – GRP : 1 – 1
voltage
2) SYS – GRP : 7 – 1
PTT : ON
3) SYS – GRP : 7 – 1
TA mode : ON
PTT : ON
Transmitter Section
Item Condition
1) SYS – GRP : 4 – ✽
1. Frequency
Select FREQ ✽ ✽ ✽
adjustment
in tuning mode.
PTT : ON
1) SYS – GRP : 4 – ✽
2. Maximum
power check Select HPOW 256
in tuning mode.
PTT : ON
1) SYS – GRP : 4 – ✽
3. TX high
Select HPOW ✽ ✽ ✽
power
adjustment in tuning mode.
PTT : ON
1) SYS – GRP : 4 – ✽
4. TX T/A
Select THPW ✽ ✽ ✽
high power
adjustment in tuning mode.
PTT : ON
1) SYS – GRP : 1 – ✽, 7 – ✽
5. TX high
power check TA mode : OFF and ON
(Press [A] key, then [C] key)
PTT : ON
1) SYS – GRP : 4 – ✽
6. TX low
power Select LPOW
adjustment in tuning mode.
PTT : ON
1) SYS – GRP : 4 – ✽
7. TX T/A
Select TLPW ✽ ✽ ✽
low power
adjustment in tuning mode.
PTT : ON
1) SYS – GRP : 1 – ✽, 7 – ✽
8. TX low
power check Low power (Press [B] key)
TA mode : OFF and ON
(Press [A] key, then [C] key)
PTT : ON
20
ADJUSTMENT
Measurement
Test-
Unit
equipment
Power meter TX-RX VC
DVM
Measurement
Test-
Unit
equipment
f. counter Panel
Power meter
Ammeter Panel
✽ ✽ ✽
Adjustment
Terminal Unit Parts
Check
Adjustment
Terminal Unit Parts
ANT Panel Encoder 815.500MHz
knob
Check
ANT
Panel Encoder 2.5W
knob
Check
Panel Encoder 1.0W
knob
Check
Specifications/Remarks
Method
0.5V or more
4.3V or less
Specifications/Remarks
Method
± 100Hz
3.0W or more
± 0.1W
1.7A or less
2.0~3.0W
1.7A or less
± 0.1W
1.2A or less
0.5~1.5W
1.2A or less