NX-203
37
TROUBLE SHOOTING
Replacing Control Unit
■
Control unit Information
Model Name
Original Control
unit Number
For Service Control
unit Number
NX-203 (K: 6-key)
X53-4590-14
X53-4590-15
■
Method of confi rming “Original Control unit”
and “Service Control unit”
The 0
Ω
resistor (R853) is mounted
on the “R853” silk print part
of the Service Control unit
(X53-4590-15).
The shielding plate is soldered
on the Service Control unit
(X53-4590-15).
X53-459
Component side
X53-459
R849
R853
R856
0-14
(None)
(None)
(None)
0-15
(None)
0
(None)
Note:
• The 0
resistor (R853) is used to differentiate the des-
tination with a visual check. These are not connected
with any PCB pattern; they are specifi cally for production
control. There is no need to change the mount of these
resistors.
• There is no difference between the schematic diagram of
the Service Control unit (X53-4590-15) is connected with
GND (ground) only.)
■
Supplied Accessories of “Service Control unit”
Item (Including Parts Number)
Quantity
Control Unit (X53-459)
1
KENWOOD ESN Label
1
NXDN ESN Label
1
■
“Service Control unit” Data
The following data is written on the service control unit:
Data Type
Description
Firmware
NX-203/303 Firmware.
FPU Data
(PC programming mode)
X53-459 (NX-303) K type data.
Various Adjustment Data
(PC Test mode)
General adjustment values for the
X53-459 (NX-303).
KENWOOD ESN
Model name:
[X53-459] NX-203/303S
Type: K
The same number as the KENWOOD
ESN label is written.
NXDN ESN
The same number as the NXDN ESN
label is written.
■
After Changing the PCB
1. After changing the printed circuit board, write the up-
to-date Firmware following the instructions in the “RE-
ALIGNMENT - 6.Firmware Programming Mode”.
2. Using the KPG-111D/111DN, select your desired item
(Model Name and Frequency) from the Model> Product
Information menu, then use Program> Write Data to
the Transceiver to write the FPU data (PC Programming
mode). When writing to the transceiver, a Warning Mes-
sage, corresponding 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. Attach the new labels corresponding to the new printed
circuit board. (Refer to the images on page 38 for label
placement.)
5. If necessary, write the FPU data used by the customer
with the KPG-111D/111DN.
