Adjustment - Kenwood TKR-850 Service Manual

Item Condition
1. Setting & 1) Connect the unit to a suitable DC power supply.
2) Turn the DC source switch on after connecting a PC and FPU cable to the radio. → "P.G." appears on LED display
Firmware
writing 3) Write the firmware to radio. After the end of firmware writing.
2. Write test 1) Connect the unit to a suitable DC power supply.
2) Turn the DC source switch on after connecting a PC and FPU cable to the radio. → "E1" appears on LED display
frequency
3) Write the test and shipping frequency to the radio.
4) End of test frequency writing.
3. Setting 1) Connect the unit to a suitable DC power supply.
2) Turn the power switch on after connecting a PC and FPU cable to the radio.
3) Start up the program for the adjustment.
4. RX PLL lock 1) RX VCO A high
voltage CH : 11 K
CH : 10 K2,K3,E
2) RX VCO A low
CH : 10 K
CH : 1 K2,K3,E
3) RX VCO B high
CH : 3 K,K2
CH : 11 K3,E
4) RX VCO B low
CH : 5 K
CH : 6 K2,K3,E
5. TX PLL lock 1) TX VCO high
voltage CH : 3
2) TX VCO low
CH : 1
6. RX 1) Connect the frequency
frequency counter to CN3, then
measure the frequency
CH : 2
Note : RX frequency means the local frequency of the RX VCO. So its frequency is wanted frequency minus the IF frequency.
7. Setting 1) Remove 8 pin cable and the coaxial cable from CN16, and CN19 on TX-RX side.
8. TX 1) Connect the frequency
frequency counter to CN19, then
measure the frequency
CH : 2
9. Setting 1) Insert 8 pin cable and the coaxial cable to CN16, and CN19 on TX-RX side.
10. Maximum 1) Measure the RF power at
power TX ANT.
limitting High CH
13. TX RF 1) Measure the RF power at
high power TX ANT.
Low CH
2) Center CH
3) High CH

ADJUSTMENT

Measurement
Test-
Unit Terminal Unit
equipment
DVM TX-RX RX-CV RX VCO TC350 1.50V
(A/2) (A3)
RX VCO TC351 1.50V
(A3)
TX-CV TX VCO TC350 1.50V
(A2)
f. counter CN3
f. counter TX-RX CN19
(A/2)
Power meter Rear TX ANT Final
TKR-850
Adjustment
Parts Method
→ Red (TX) LED lights up
→ Green (BUSY) LED lights up
± 0.1V
Check 8V or less
± 0.1V
Check 8V or less
± 0.1V
K,K2,E
TC351
K3
Check 8V or less
PC adj. 50Hz or less
Test CH–44.85MHz
PC adj. 50Hz or less
Adjust the RF power ± 1W
VR1
to 43W.
± 1W
PC adj.
40W
(Shipping power)
Specifications/Remarks
43