Please forward this error screen to 50. Programming interface schematics for Kenwood :simple RS232 cable, see user manual. PA3GUO also checked the PLL voltages, and most were OK. 0V or less, kenwood ts 440s service manual pdf 1.
0V or less, actual 2. Roel, PA1DYK had the same deviations as PA3GUO. Problem solved for PA1DYK ! Help came from the USA Kenwood Service Center East.
Another that the shield plate was hitting the positive supply point. With you radio turning off that may be the problem. After this the radio of PA1DYK worked perfectly, no PLL unlock anymore ! Problem solved for PA3GUO ! Now it was my turn to get my radio repaired.
We have cut these leads back to an acceptable length. More leads were present that were too long, eg the coax connector ones, and all were cut. Next some raisin was removed from ground tracks and the chassis. One solder cat whisker was removed from a VCO solder connection. Unfortunately, after putting the radio together again, the PLL unlock still happened. Now – this modification I actually never did. PLL unlock problem disappeared !
In my case the radio never went into unlock mode anymore. If it ever comes back though, I will implement the countermeasure of Kenwood given above. But for the time being I leave it as is. I tried very hard !
The PLL voltages as discussed above are still as before. PLL unlock problems and we left them as is. CPU only believe so, but in fact it is not? Most HAMs do not resolve these themselves, but ship their radio to Kenwood.
Finally, we are extremely thankfull to the manager of Kenwood’s Service Center East for his help – great job Steve ! Trying the modifications described in this article on your own equipment, is on your own risk. Performing modifications of some equipment may be a violation of local laws. If you have any doubts, do not perform the modification. PA3GUO nor PA1DYK will assume any responsibility.
This page has undergone a major reorganization. Kenwood’s web page for current information. This module is used in the TM-241, TM-741 2m module, and others. This is the program that is used by the TK-6110 and TK-190 low-band radios. Background information, models, and other contributions. TK-860 and several other models.
DB25 connections, and the handheld connections. PC as well as programming them from the front panel. CHECK THE VERSION NUMBER ON THE BACK. 4 is for 406 to 430 MHz “government” band. 45 watts out of them.
A writeup on front panel programming of these models. I can’t build on it. Rock solid radios in their day. Com-Spec external TD-32 PL encoder boxes strapped to their radios. Probably usable on many mobile radios with the 6-pin round mike connector. For the TS-440S and others. 430 MHz FM DUAL BAND handheld.
The difference between the two radios is one diode. The antenna connector on the radio is an SMA male. Note: The TK-290 radio is only rated for up to 7. 12v source without a voltage regulator in the cord. Note: This Service Manual applies to products with serial numbers 30300001 and higher. KCH-10 and KCH-11 front panels are applicable to the productions June 2001 and after.