Kenwood NX-300 Service Manual

Also see for NEXEDGE NX-300: Brochure Instruction manual Instruction manual Instruction manual Instruction manual

NX-300(G)43TROUBLE SHOOTINGReplacing Control Unit■ Control unit InformationModel Name Original Controlunit NumberFor Service Controlunit NumberNX-300(G) (K,K2: 6-key) XC1-0020-10 XC1-0020-12NX-300(G) (K3,K4: 18-key) XC1-0020-11 XC1-0020-13■ Method of confirming “Original Control unit”and “Service Control unit”The 0Ω resistor (R853) is mountedon the “R853” silk print partof the Service Control unit(XC1-0020-12/XC1-0020-13).The shielding plate is solderedon the Service Control unit(XC1-0020-12/XC1-0020-13).XC1-002Component sideXC1-002 R848 R849 R853 R8560-10 0Ω (None) (None) (None)0-11 (None) 0Ω (None) (None)0-12 0Ω (None) 0Ω (None)0-13 (None) 0Ω 0Ω (None)Note:• The 0Ω resistor (R848, R849 and R853) is used to differ-entiate the destination with a visual check. These are notconnected with any PCB pattern; they are specifically forproduction control. There is no need to change the mountof these resistors.• There is no difference between the schematic diagramof 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 areconnected with GND (ground) only.)■ Supplied Accessories of “Service Control unit”Item (Including Parts Number) QuantityControl Unit (XC1-002) 1KENWOOD ESN Label 1NXDN ESN Label 1Product Number Label 1MPT ESN Label 1■ “Service Control unit” DataThe following data is written on the service unit:Data Type DescriptionFirmware NX-200(G)/300(G) Firmware.FPU Data(PC programming mode) XC1-002 (NX-300(G)) K type data.Various Adjustment Data(PC Test mode)General adjustment values for theXC1-002 (NX-300(G)).KENWOOD ESNModel name:[XC1-002] NX-200G/300GS1 (NoDTMF keypad) or NX-200G/300GS2(with DTMF keypad)Type: KThe same number as the KENWOODESN label is written.NXDN ESN/MPT ESN/Product numberThe same number as the NXDN ESN/MPT ESN/Product Number label iswritten.■ After Changing the PCB1. 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> ProductInformation 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] tocontinue 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 printedcircuit board. (Refer to the images on page 44 for labelplacement.)5. If necessary, write the FPU data used by the customerwith the KPG-111D/111DN.