Kenwood NX-411 Service Manual page 35

Replacing TX-RX Unit
■ TX-RX unit Information
Original TX-RX
Model Name
unit Number
NX-411 (K2) X57-8120-10
■ Method of confi rming "Original TX-RX unit" and
"Service TX-RX unit"
X57-812
Component side
The 0Ω resistor (R178) is mounted
on the "R178" silk print part of the
Service TX-RX unit (X57-8120-11).
X57-812 R177
0-10
0-11 (None)
Note:
• The 0 resistor (R177 and R178) is used to differentiate
the destination with a visual check. These are not con-
nected with any PCB pattern; they are specifi cally for pro-
duction control. There is no need to change the mount of
two resistors.
• There is no difference between the schematic diagram of
the Service TX-RX unit (X57-8120-11) and the schematic
diagram of the original TX-RX unit (X57-8120-10). (R177
and R178 are connected with GND (ground) only.)
TROUBLE SHOOTING
For Service TX-RX
unit Number
X57-8120-11
R177
R178
R178
0 (None)
0
■ Supplied Accessories of "Service TX-RX unit"
Item (Including Parts Number)
TX-RX Unit (X57-812)
Kenwood ESN Label
NXDN ESN Label
MPT ESN Label
Addendum (B59-2698-XX)
■ "Service TX-RX unit" Data
The following data is written on the service TX-RX unit:
Data Type
Firmware K-type Firmware.
FPU Data
X57-812 (NX-411) K2 type data.
(PC programming mode)
Various Adjustment Data General adjustment values for the
(PC Test mode) X57-812 (NX-411).
Model name: NX-411S
Type: K2
Kenwood ESN
The same number as the Kenwood
ESN label is written.
The same number as the NXDN ESN/
NXDN ESN/MPT ESN
MPT 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, select your desired item (Model
Name and Frequency) from the Model> Product Informa-
tion menu, then use Program> Write Data 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 36 for label
placement.)
5. If necessary, write the FPU data used by the customer
with the KPG-111D.
Note:
• When using the ESN Validation function of NXDN Trunk-
ing, the NXDN ESN number changes when the circuit
board is changed (the number is written on the circuit
board); the NXDN Trunking System cannot be accessed.
Use the KPG-110SM on the NXDN Trunking System side
to reprogram the NXDN ESN number.
• When a new printed circuit board is used, the Kenwood
ESN changes, as does the Transceiver Information dis-
play of the KPG-111D, but this does not have any effect
on the operation of the transceiver.
• If changing to the original Kenwood ESN, NXDN ESN
and MPT ESN, please contact our service center.
NX-411
Quantity
1
1
1
1
1
Description
35