Kenwood TKR-D710 Service Manual page 50

TKR-D710
■ Replacing the Final FET (Q4)
1) The X45 (fi nal) PCB must be shifted to the left after plac-
ing it into the chassis.
Insert a board of just 1mm between the PCB and the
case.
2) The FET (RD70HVF1-101) must be shifted to the right
during mounting.
Max Power NG
X45 PCB
Center
FET
3) Apply solder to cover the entire FET terminal. (Both input
and output terminals of the FET (Q3,Q4)).
Max Power NG
3. Replacing Control Unit
3-1. Control Unit Information
Original Control Control Unit
Unit (Service Unit)
X53-4580-10 X53-4582-71
3-2. Supplied Accessories
Item (Including Part Number)
Control Unit (X53-458)
KENWOOD ESN Label
50
TROUBLE SHOOTING
Max Power OK
Center
FET
Max Power OK
Difference between Original
Unit and Service Unit
As for the Service unit, "2-
71" is stamped on the PCB.
2 – 71
Quantity
1
3
3-3. Printed Circuit Board Data
The following data is written on the printed circuit board:
Data Type
Firmware TKR-D710/D810 Firmware
FPU Data
TKR-D710 E type data.
(PC programming mode)
Various Adjustment Data General adjustment values for the
(PC test mode) TKR-D710.
Model Name: TKR-D710810S
Type: E
KENWOOD ESN
The same number as the Kenwood
ESN label is written.
3-4. After Changing the PCB
1. After changing the printed circuit board, write the up-
to-date Firmware following the instructions in the "RE-
ALIGNMENT 4. Firmware Programming Mode" .
2. Using the KPG-174D, select your desired item (Model
Name and Frequency) from the Model > Product Infor-
mation menu, then use Program > Write Data to the re-
peater to write the FPU data (PC Programming mode).
When writing to the repeater, a Warning Message, cor-
responding to the item selected, appears. Click [OK] to
continue writing the data.
3. Enter Program > Test mode, then adjust the various ad-
justment data (PC Test mode) as described in the "AD-
JUSTMENT" .
4. For the X53-458, attach the new labels corresponding to
the new printed circuit board. (Refer to the images on
page 51 for label placement.)
5. If necessary, write the FPU data used by the customer
with the KPG-174D.
Note:
• When a new printed circuit board is used, the KENWOOD
ESN changes, as does the Repeater Information display
of the KPG-174D, but this does not have any effect on the
operation of the transceiver.
• If changing to the original KENWOOD ESN, please con-
tact our service center.
• Re-installing other parts from original unit to Service unit
is not required after changing to Service unit.
Description