Kenwood NX-300 Service Manual page 43

Replacing Control Unit
■ Control unit Information
Original Control
Model Name
unit Number
NX-300(G) (K,K2: 6-key) XC1-0020-10
NX-300(G) (K3,K4: 18-key) XC1-0020-11
■ Method of confirming "Original Control unit"
and "Service Control unit"
The 0 resistor (R853) is mounted
XC1-002 on the "R853" silk print part
Component side
of the Service Control unit
(XC1-0020-12/XC1-0020-13).
The shielding plate is soldered
on the Service Control unit
(XC1-0020-12/XC1-0020-13).
XC1-002 R848 R849
0-10 0Ω (None)
0-11 (None)
0-12 0Ω (None)
0-13 (None)
Note:
• The 0Ω resistor (R848, R849 and R853) is used to differ-
entiate the destination with a visual check. These are not
connected with any PCB pattern; they are specifically 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 (XC1-0020-12/XC1-0020-13)
and the schematic diagram of the original Control unit
(XC1-0020-10/XC1-0020-11). (R848, R849 and R853 are
connected with GND (ground) only.)
TROUBLE SHOOTING
For Service Control
unit Number
XC1-0020-12
XC1-0020-13
R853 R856
(None) (None)
0Ω (None) (None)
0Ω (None)
0Ω 0Ω (None)
■ Supplied Accessories of "Service Control unit"
Item (Including Parts Number)
Control Unit (XC1-002)
KENWOOD ESN Label
NXDN ESN Label
Product Number Label
MPT ESN Label
■ "Service Control unit" Data
The following data is written on the service unit:
Data Type
Firmware NX-200(G)/300(G) Firmware.
FPU Data
XC1-002 (NX-300(G)) K type data.
(PC programming mode)
Various Adjustment Data General adjustment values for the
(PC Test mode) XC1-002 (NX-300(G)).
Model name:
[XC1-002] NX-200G/300GS1 (No
DTMF keypad) or NX-200G/300GS2
KENWOOD ESN (with DTMF keypad)
Type: K
The same number as the KENWOOD
ESN label is written.
The same number as the NXDN ESN/
NXDN ESN/MPT ESN/
MPT ESN/Product Number label is
Product number
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 to the Trans-
ceiver to write the FPU data (PC Programming mode).
When writing to the transceiver, 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. Attach the new labels corresponding to the new printed
circuit board. (Refer to the images on page 44 for label
placement.)
5. If necessary, write the FPU data used by the customer
with the KPG-111D/111DN.
NX-300(G)
Quantity
1
1
1
1
1
Description
43