Kenwood TH-K2AT Service Manual page 35

Common Section
Item Condition
1.Setting and Connect the optional PG-2W
resetting DC cable to the pow er supply.
DC IN terminal voltage: 13.8V
1) Total illumination display
confirmation
Turn the Transceiver Pow er ON by pressing the pow er sw itch w hile the [F] key is pressed.
While the [F] key is pressed, all LCD segments light.
2) Full-resetting
After confirming that all LCD segments have lighted described in the Step 1 above, release
the [F] key, and then press the [F] key tw ice w hile " FL.RST?" appears on the display.
2 VCO After removing 3 screw s fixing
Lock voltage the TX-RX unit (B/3), remove
Check the TX-RX (B/3) unit from the
CN9 connector of the TX-RX
unit (A/3).
1) Frequency: 136.000M Hz
RX 2) Frequency: 173.990M Hz
TX TX pow er: Low
1) Frequency: 136.000M Hz
PTT: ON
2) Frequency: 173.990M Hz
PTT: ON
After observing the VCO
lock voltage, connect the
TX-RX unit (B/3) to the
original position.
3.TX frequency 1) TX pow er: Low
Adjust Frequency: 145.990M Hz
PTT: ON
4.Overvoltage Sw itch to Adjustment mode
w arning and carry out the operations
reference for adjustment item A.
voltage (Refer to page 28)
Adjust/Check 1) LCD display: DC
Frequency: 145.050M Hz
(E, E3)
Frequency: 146.050M Hz
(K, K2, M , M 2)
DC IN terminal voltage: 14.8V
To exit from the Adjustment
M ode, turn the transceiver
pow er OFF and then ON.
2) Frequency: 145.050M Hz
(E, E3)
Frequency: 146.050M Hz
(K, K2, M , M 2)
DC IN terminal voltage: 17.5V
ADJUSTM ENT
M easurement
Test equipment Unit Terminal
LCD total illumination display
DVM TX-RX LV
(A/3)
f. counter ANT
DC pow er supply
TH-K2AT/K2E/K2ET
Adjustment
Unit Parts M ethod
Initial configuration displayed after
the full-reset.
Check
TX-RX VR1 145.990M Hz
(A/3)
[M ENU] Write
Check
Specifications/
Remarks
0.7V or more
4.3V or less
0.7V or more
4.3V or less
±150Hz
Alarm sound and
display " DC ERR"
message.
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