Kenwood NX-900 Service Manual page 43

Replacing TX-RX Unit
■ TX-RX Unit Information
Original
Model Name
TX-RX Unit Number
NX-900 (K) X57-8060-10
■ Method of confi rming "Original TX-RX unit" and
"Service TX-RX Unit"
Silk print
R880
R881
The 0Ω resistor (R881) is
mounted on the "0-11"
silk print part of the
Service TX-RX unit
(X57-8060-11).
■ Supplied Accessories of "Service TX-RX Unit"
Item (Including Part Number)
TX-RX Unit (X57-806)
Kenwood ESN Label
NXDN ESN Label
MPT ESN Label
Addendum (B59-2576-XX)
■ "Service TX-RX Unit" Data
The following data is written on the service unit:
• Firmware
• FPU Data
• Various Adjustment Data
• Kenwood ESN ("S" is given after the model name.)
• NXDN ESN / MPT ESN
■ Printed Circuit Board Data
The following data is written on the printed circuit board:
Data Type
Firmware NX-900 Firmware.
FPU Data
X57-806 (NX-900) K type data.
(PC programming mode)
Various Adjustment Data General adjustment values for the
(PC Test mode) X57-806 (NX-900).
Model Name: [X57-806] NX-900S
Type: K
Kenwood ESN
The same number as the Kenwood
ESN label is written.
The same number as the NXDN
NXDN ESN/ MPT ESN
ESN/ MPT ESN label is written.
TROUBLE SHOOTING
For Service
TX-RX Unit Number
X57-8060-11
X57-806 A/2
Component side
CN595
Quantity
1
1
1
1
1
Description
■ 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).
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 below for label place-
ment.)
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.
■ ESN Label Layout
(Not used)
(Not used)
Kenwood
ESN Label
NXDN ESN Label
MPT ESN Label
Note: A UPC code and UPC barcode is not printed on the
Kenwood ESN Label. If necessary, cut the label at the cut-
off line and attach only the serial number.
NX-900
NX-900
43