Replacing Control Unit; Control Unit Information; Method Of Confirming “Original Control Unit” And “Service Control Unit”; Supplied Accessories Of “Service Control Unit” - Kenwood NX-300 Service Manual

Replacing Control Unit

■ Control unit Information

Original Control
Model Name
unit Number
NX-300 (K,K2: 6-key) X53-4260-10
NX-300 (K3,K4: 18-key) X53-4260-11
■ Method of confi rming "Original Control unit"
and "Service Control unit"
The 0Ω resistor (R853) is mounted
X53-426 on the "R853" silk print part
Component side
of the Service Control unit
(X53-4260-12/X53-4260-13).
The shielding plate is soldered
on the Service Control unit
(X53-4260-12/X53-4260-13).
X53-426 R848 R849
0-10 0Ω (None)
0-11 (None)
0-12 0Ω (None)
0-13 (None)
Notes:
• The 0Ω resistor (R848, R849 and R853) is used to dif-
ferentiate the destination 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 (X53-4260-12/X53-4260-13)
and the schematic diagram of the original Control unit
(X53-4260-10/X53-4260-11). (R848, R849 and R853 are
connected with GND (ground) only.)
TROUBLE SHOOTING
For Service Control
unit Number
X53-4260-12
X53-4260-13
R853 R856
(None) (None)
0Ω (None) (None)
0Ω (None)
0Ω 0Ω (None)
■ Supplied Accessories of "Service Control unit"
Item (Including Parts Number)
Control Unit
Kenwood ESN Label
NXDN ESN Label
Product Number Label
Addendum (B59-2533-XX)
■ "Service Control unit" Data
The following data is written on the service unit:
Data Type
Firmware NX-300 Firmware.
FPU Data
X53-426 (NX-300) K type data.
(PC programming mode)
Various Adjustment Data General adjustment values for the
(PC Test mode) X53-426 (NX-300).
Model name:
[X53-426] NX-200/300S1 (No DTMF
keypad) or NX-200/300S2 (with DTMF
Kenwood ESN keypad)
Type: K
The same number as the Kenwood
ESN label is written.
NXDN ESN/Product The same number as the NXDN ESN/
number Product Number 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, select your desired item (Model
Name and Frequency) from the Model> Product Informa-
tion menu, then use Program> Write to the Transceiver
to write the FPU data (PC Programming mode). When
writing to the transceiver, a Warning Message, corre-
sponding 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 36 for label
placement.)
5. If necessary, write the FPU data used by the customer
with the KPG-111D.
NX-300
Quantity
1
1
1
1
1
Description
35