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Technical Information on Land Mobile Radio Equipment Compiled by Mike Morris WA6ILQ from donations from several folks Click here or on the logo above for the main Kenwood web site

Contact / Service / Parts Information:
	USA West Coast		USA East Coast		Canada
	Kenwood Communications Corp. 2201 East Dominguez Street PO Box 22745 Long Beach, CA 90801-5745 USA Customer support: 310-639-4200 Repair locations and parts: 800-KENWOOD (or) 800-536-9663 Fax: 310-537-8235 http://www.kenwoodusa.com		Kenwood Corporate Offices 3975 Johns Creek Court Suite 300 Suwanee, GA 30024 Main: (678) 474-4700 Fax: (678) 474-4730 http://www.kenwood.net		Kenwood Electronics Canada Inc. 6070 Kestrel Road Mississauga, Ontario, Canada L5T1S8
	Kenwood Service Center West 13030 Alondra Blvd., Suite 104 Cerritos, CA 90703-2257 Repairs Only: (562) 483-874 Fax: (562) 483-8749		Kenwood Service Center East 829 Lynnhaven Pkwy., Suite 130 Virginia Beach, VA 23452 Repairs Only: (757) 340-1702 Fax: (757) 340-6809
	Pacific Coast Parts Orders: (800) 262-1312 www.pacparts.com		Kenwood Amateur Parts (Also known as East Coast Transistor) Orders: (800) 637-0388 www.kenwoodparts.com

Note that the contents of this page, like most here at www.repeater-builder.com, are totally dependent on donations of information. If you have a hint, or a useful trick, please consider wiring it up, writing it up and sending it in.

Kenwood Amateur Radio products:

If you need help on a Kenwood amateur product, well as of May 2005 (the time of this writing), there are over 150 "Kenwood" groups on Yahoo Groups alone, plus there are a number of other web sites that cater to the Kenwood Amateur Radio enthusiast, so there is no point in covering here what can be found elsewhere...

However there isn't much out there on using Kenwood commercial equipment in the amateur radio world... but you can check out any of these Yahoo! Groups (this is a partial list, as of May 2005): (all are ...@yahoogroups.com)

Kenwood-TK-30-90-Series-Mobiles                     (TK730 & 790 series)
Kenwood_LMR                     "LMR" is the actual name for commercial two-way radio ("Land Mobile Radio")
kenwoodlmr
Kenwood2Way
kenwood_commercial_radios1
Kenwood_commercial_radio
Kenwood_05s                     (only the TK-705(D) (VHF) and TK-805(D) (UHF) models)
Kenwood_TKSeriesRadios
kenwoodtk2140_3140

The number of Kenwood-related groups has no doubt expanded since the above list was created.   I have no doubt that you will find a yahoogroup or web site that caters to your model Kenwood ham radio.

We do have a few Kenwood-related downloads here, simply because we couldn't find that info anywhere else so had to dig it up ourselves. Once we had it there was no sense not to make it available to other hams...

Information and Modifications
	Repairing the Toshiba S-AV17 RF power hybrid   Used in the TM-241, TM-741 2m module, and others. By Kevin Custer W3KKC
	How to mod a Kenwood TK-805 for UHF link or remote base operation   349KB PDF by Dwayne at LDG Electronics
	PS-30 Schematic (with repair notes)   904KB courtesy A. Nony Mous Anybody have the full manual?
	A library of 16 different microphone, speaker-mic, accessory plug, etc. Kenwood connector diagrams   202 KB PDF
	A drawing of the 6-pin RJ-style microphone connector on the TK-705 / 805, the TK-760/860 and several other models.   4KB GIF
	The Kenwood PG-4S programming cable is used to program a Kenwood TM-V7A or a TM-G707A. You can make your own using info from the KC7ZRU web site page on the PG4S. Supposedly you can use an inexpensive KPG-4 (6 pin) or KPG-46 (8 pin) cable from eBay and an adapter made from a 6-pin or 8-pin jack and the plug end of a PS/2 style PC keyboard or mouse extension cord. You can download the software for it from Kenwood using these directions (from an email from Kenwood): Dear Kenwood Customer: Thank you for your e-mail. You may download the TM-G707A or TM-V7A programmimg software from our web page: 1) Go to www.kenwood.net 2) Click on Amateur Radio 3) Click on Downloads 4) Click on MCP-RCP Software 5) Click on TM-G707A (download MCP-G707) or click on TM-V7A (download MCP-V7) Information on how to program your TM-G707A or TM-V7 from your PC: The optional programming cable is a PG-4S, you will probably need an adapter to go from a DB25 to a DB9. Try the Radio Shack # 26-269. If you get a request for a username, and password use a different browse other than Netscape Communicator, or Navigator try Internet Explorer. There is NO requirement for a password or user name to access the software on our web site. You will need to use the COM1 or COM2 on your PC, and NOTHING CAN SHARE THAT PORT (example mouse) Again nothing can share those ports need for programming. If you have any errors, or time out messages, these are normally due to your PC settings, and not the radio. PC Settings: 1. Click on Start 2. Click on Settings 3. Click on Control Panel 4. Click on Systems 5. Click on Hardware 6. Click on Device Manager 7. Click on Ports (Com & LPT) 8. Click on Communications Port (Com 1) 9. Click on Port Settings Now set as follows: Bits Per Second: 9600 Data Bits: 8 Parity: NONE Stop Bits: 1 Flow Control: Xon/Xoff If you need further assistance, please e-mail us again. Sincerely, Kenwood Amateur Radio Customer Support The files you actually receive from that download are Mg70710.exe (TM-G707) and Mv7110.exe (TM-V7A). Local copies are here (in zip format): Mg707110.zip and Mv7110.zip.
	Modifying the Kenwood "packet" connector... Most of the newer Kenwood amateur mobile radios have a "packet" connector on them. All of these radios have a VERY annoying characteristic that shows up if you try to use the radio as a remote base or as a mobile repeater: the COS pin is carrier driven, not audio mute driven. This means that if you put the receiver into CTCSS mode the COS output still tracks the channel activity, not the squelch opening. Kenwood needs to change the firmware to add yet another menu item, one that selects the COS output to one of three modes: (1) channel activity driven (the current behavior), (2) CTCSS driven or (3) receiver unmuting driven (which takes into account the carrier/CTCSS mode). Radios with built-in TNCs (like the TM-D700) should have one additional mode: CD driven (i.e. the output is active during a valid packet signal). Until Kenwood gets their act together, here's a quickie mod, courtest of Ken Arc AH6LE at Arcom, who says that Eric W2ZT first posted it: The internal "SQ" line of the G707A is active with an open squelch in carrier mode. When in "CT" mode, it’s active only when the proper PL frequency is received. This behavior in other manufacturers is named "audio mute" - it's a signal that takes into account the carrier squelch/ctcss mode and the presence or absence of the CTCSS tone signal. This "SQ" line can be found at CN4 pin 11 on the main TX-RX board or CN502 pin 11 on the Control board (behind the front panel). If you don’t wish to perform this modification to the din socket (kind of intricate), you can simply attach a wire to one of these points, then route it out of the radio and connect it to an appropriate connector. I modified my TM-G707A by routing the internal "SQ" line to pin 6 on the radio’s mini din socket (replacing the current connection). My method of doing this required the cutting of a circuit trace on the Control board (current din connection) and routing a wire from pin 11 of CN502 to the side of the trace cut that connected to pin 6 of the din socket. This mod will facilitate fully agile CTCSS decode &/or encode functionality using only the RC-210's A72xx1 or A72xx2 commands without the need for an external PL decoder. Additionally, the remote base controller port can be left in carrier mode. Don’t forget to change the controller’s remote base port setup from active high to active low. Hope this helps someone.... de AH6LE Ralph Hogan W4XE took Ken's info and did a TM-G707 photo article on it (3.8 Mb PDF file). He later emailed an update: I have a follow on note to my article on modifying the Kenwood G707's packet connector for allowing a CTCSS decode signal to be available instead of a COS only signal. The modification described breaks the serial connection to the radio - it will not allow the PC programming software, the PG-4S cable or the cloning cable to work. To resolve this I added a miniature toggle switch to select between the old COS only signal (for use while programming) and the new COS and CTCSS signal (for day -to-day operation). Bob Dengler NO6B made W4XE's mod to his radio, and emailed in these comments: The new combined CTCSS AND COS signal you get is active low, which is opposite of the COS-only signal that was there prior to the mod. This is documented in the file, but worth mentioning as you will have to reprogram the equipment connected to the radio. The volume control must not be turned all the way down, otherwise the signal stays inactive (high) at all times. This really threw me after performing the the mod as I left the speaker disconnected during testing, so I kept the volume turned all the way down to prevent damage to the speaker output driver. As a result, I couldn't get any change from the inactive 5vDC level on the new combined CTCSS AND COS signal output until I accidentally bumped the volume control. Also, anything that causes a beep such as pressing a front panel button will cause the signal to go active during the beep. You may want to put a 10 ohm resistor into a plug that matches the speaker jack so that you can leave the volume turned up a little and have the speaker off. Page 9 of the PDF file notes a heavy build-up of flux around the 6 pin mini-DIN connector. I found that on my G707 as well; I wonder if all those connectors were hand soldered? Bernie Parker K5BP did the same mod to a TM-271.

Manuals The publications group at Kenwood seems to have decided that a "dual band" radio is dual simultaneous receive, and a "twin band" or "two band" radio is one at a time.
	TH-78 Owners/Instruction manual   294KB PDF
	TH-G71A and TH-G71E Instruction Manual   2.58 MB PDF
	TM-241-441-541 Owners manual   (horizontal - oriented towards reading on the screen) 2.26MB PDF The same manual except vertically oriented (for printing)   2.2MB PDF
	TM-241A Service manual   5.74 MB PDF
	TM-261, TM-261EJ and TM-461 Instruction mnaual   2.9mb PDF
	TM-271 Adjustments section of the service manual   This is a really poor scan. It's also contained in the service manual below.
	TM-271A Service manual   36.7MB PDF
	TM-721 Service Manual   15.9MB PDF
	TM-641A / TM-741A / TM-741E Instruction manual   6.5 MB PDF These radios can draw as much as 12 amps on transmit, and the DC wire that was shipped with them was undersized. Measure the voltage at the back of the radio while transmitting and if it does not remain above 13vDC you will have to check the voltage at the battery. If that is fine then you will need to change the wiring to an larger size (lower resistance) wire.
	TM-641 / TM-741 Service manual   15.4MB PDF
	A tip on the 641 / 741 / 941 / 642 / 742 / 942 series from Rian AG4ME: If you have no audio output, and the light dimmer does not work then look at resistor R121 and maybe transistor Q102 in the control head becoming un-soldered.
	The TH-D7AE is a dual band handheld that has a built in packet / aprs TNC. THD7-AE Service Manual   7.35 MB PDF
	The TM-D700 is a dual band mobile that has a built in packet / aprs TNC.
	TM-D700 sales brochure   679KB PDF
	This is the software package that lets the PC program the radio (freeware).   398KB executable file
	TM-D700 APRS / Packet manual   855KB PDF file
	TM-D700A Owners / operators manual   2.68MB PDF
	The TM-G707 is a basic twin band mobile (one band at a time - For simultaneous receive see the TM-V7).
	TM-G707 sales brochure   817KB PDF
	TM-G707 Instruction Manual   2.5MB PDF
	Anybody have the service manual for the TM-G707 ??
	The TM-V7 is the dual band mobile. The early ones had a history of developing lines in the display due to a poor design. Kenwood did a recall/replacement of the displays, but naturally some folks didn't get the word. If you have a used V7 that has lines you will have to live with it, there are no more replacements to be had. Or use it as a remote base.
	TM-V7A / TM-V7E Instruction Manual   4.9MB PDF
	TM-V7A / TM-V7E Service manual   2.7MB PDF
	A "usability" note from Dan Hopper KU4NF on the TM-V7A radio and the PC software they provide to upload and download the 180 memories... if you download the radios memory, move some locations around and thus create some newly empty locations, and then write it back to the radio it doesn't seem to delete the now-empty locations like it should, it merges the upload with the momory contents resulting in duplicate locations where the old entries are visible in the empty channels in the new data. My workaround is to delete all the memories in the radio before doing a write to the radio, thus giving the new data a clean slate to program into. How do you erase only the memories and none of the other settings? None of the power-up hotkeys seem to do this. However, if you have the radio change the VHF/UHF channel ratio, it'll prompt you to OK erasing all the memories. Do that, then change it back to your original ratio or a new ratio, and then write from the software to the radio. Kludgy, but it works. Note from WA6ILQ - The same problem will probably happen in the TMG-707 series. If Kenwood is going to fix the duplicating problem (don't hold your breath), another feature that would be nice to add is a way to export the download as a Excel file, allowing the user to use Excel (or the spreadsheet from the free Open Office package) to manipulate the data, then import it back into the Kenwood package for uploading to the radio.
	TM-V71 Instruction Manual   4.3 MB PDF courtesy A. Nony Mous For details on the programming (PG-5G) and audio (PG-5H) cables click here: http://www.kenwood.com/i/products/info/amateur/pg5g_5h_e.html The free programming software for the radio can be downloaded from Kenwood at http://www.kenwood.com/i/products/info/amateur/mcp_2a.html. Or from here: Download MCP-2A Version 3.10 (filename: M2A310.exe; file size : 3.72MB), or if you have a paranoid ISP that forbids downloading EXE files you can click here: Download MCP-2A Version 3.10 (filename: M2A310.zip; file size : 2.95 MB). The only difference is that the executable file inside the ZIP is renamed to M2A310.EEE, you will have to rename it to EXE before running it. There is a firmware update to this radio according to http://www.kenwood.com/i/products/info/amateur/tmv71_d710_main_update_e.html that increases the usability as a remote base or EchoLink radio.
	TM-V71 Service Manual   5.7 MB PDF courtesy A. Nony Mous
	TM-V71 Mods   5.1 MB PDF courtesy A. Nony Mous
	PS-50 Manual   For the TS-440 and others.   584KB courtesy A. Nony Mous
	TS-140s / TS-680s Instruction Manual   1.16MB courtesy A. Nony Mous
	User / operating manual for the TS-700 2M all mode radio   1.9 MB PDF
	User / operating manual for the TS-600 6M all mode radio   3.6 MB PDF
	User / operating manual for the TR-7600 with schematic   2.03MB PDF courtesy Jim MacDougald KB6ZOP
	Service manual for the TS-850S in four PDF files: Part 1   2.7 MB PDF Part 2   1.3 MB PDF Part 3   2.9 MB PDF Part 4   1.4 MB PDF

Straight Info on Kenwood radios and the Amateur 900 MHz Band

Don't let anyone sell you a TK-430, TK-480, TK-930, TK-940 or TK-980 radio as they are all 800 MHz and will not work on amateur 900 MHz. Kenwood hasn't yet imported an amateur 900 MHz radio so the USA hams that choose Kenwood are forced into using surplus commercial radios - the TK-431 and TK-481 handhelds and the TK-931, TK-941 and TK-981 mobiles. The TK-431 and TK-941 are not too useful for amateur 900 MHz since they have a -39 MHz repeater offset that is fixed in the firmware, and despite several man-months of reverse engineeering time there appears to be no way to change it to a -25 MHz offset. They can be used by programming two channels, one set up to transmit on the repeater input, the other set up to receive the repeater output, then turn on the scan function. Unfortunately this means that you have to wait for the carrier delay timer in the repeater to drop out before you can transmit. Plus, if you have more than one active system in the area, the scan can stop on the wrong output and you will get cut out of your conversation. As a result, the TK-431 makes a good simplex handheld, or a portable monitoring receiver, and the TK-941 mobile makes a good simplex link radio, an exciter, or a reasonable repeater receiver when placed behind a good pass-notch duplexer (but you have to change the front end filters to the ones that pass 902 MHz). On the other hand, the TK-481 handheld and both the TK-931 and TK-981 mobiles are excellent amateur 900 MHz radios as they are not design-locked as to offset and therefore can all do the amateur standard -25 MHz split. Programming: You will need both software and a programming cable to set up your radio... The DOS programs listed below CANNOT use a USB-based programming cable. Radio Software System Cable Comments TK-431 handheld KPG-16D DOS KPG-22 -39mhz offset only TK-481 handheld (early) serial number before 30100001 KPG-35D DOS KPG-36   TK-481 handheld (late) serial number of 30100001 or greater KPG-49D Windows KPG-36 Preferred TK-931 mobile KPG-5D DOS KPG-4 (6 pin) or KPG-46 (8 pin) Preferred TK-941 mobile KPG-25D DOS KPG-4 (6 pin) or KPG-46 (8 pin) -39mhz offset only TK-981 mobile KPG-49D Windows KPG-4 (6 pin) or KPG-46 (8 pin) Preferred The programming cables are essentially RS-232 to TTL converters and homebrew diagrams are on this page. The handheld programming cable plugs into the speaker-microphone connector(s), the mobile cable plugs into the front panel microphone jack. Both connect a serial port from your computer to the radio and is used to load your frequencies and other parameters into the radio. None of the above radios are front panel programmable. Note that Kenwood numbers the pins backward from Ethernet. The KPG-4 and the KPG-46 are the exact same unit except for the RJ connector on the radio end of the cable. The KPG-4 has a 6-pin (RJ-11 / RJ-12-style) connector. The earlier KPG-46 has an 8-pin connector (RJ-45 style) and the center 6 pins are wired the same and the outer 2 pins are not used. If you are careful the 6-pin KPG-4 will work perfectly in the 8-pin mic jack. The plastic tab should only let you put the 6-pin plug into the middle of the 8-pin jack since pins 1 & 8 on the 8-pin jack aren't used for programming purposes. If you want you can build an adapter starting with a 6-pin RJ-12 jack wired to a stub of a common 8-pin RJ45 ethernet cable. See this schematic for a KPG-4 and KPG-46 cable. Or look here for another one that has a bit more detail.
If anyone would like to put together a programming article (with screen shots? they are not hard to do) we'd be happy to put it here.
Email lists: There are two 900 MHz lists and the first one listed below has 90% of the traffic. Note that these are 900 MHz lists (any radio, not just Kenwood) and do not take kindly to off-topic discussions. Personally, I'd subscribe to both. If you change your mind you can always unsubscribe later.
	http://groups.yahoo.com/group/AR902Mhz   From the description text: "This listserv is used to further experimentation and utilization of the 902-928 MHz amateur radio spectrum using voice and data communications. Please limit your posts to information relating to these subjects ONLY. Want and For-Sale ads allowed. Do not post EBAY links. Do NOT list non-900 MHz applicable items."
	http://groups.yahoo.com/group/900mhz   From the description text: "For those interested in utilizing the 900 MHz amateur radio band. This group is here to discuss modification of commercial radio gear to amateur radio use, repeater construction for 900 MHz, and other related topics relating to the 900 MHz amateur radio band."

900 MHz Kenwood Radio Manuals and Info

As mentioned above a model number ending in a zero is 800 MHz, and ending in a 1 is 900 MHz In other words, TK or TM-nn0=800 MHz, TK or TM-nn1=900 MHz.
Handhelds:
	Anybody have a step-by-step programming procedure for the 900 MHz TK-431 or 481 handheld ?
	Anybody have the catalog page / specifications sheet PDF or service manual PDF for the TK-431 handheld ?   Or one we can scan ?
	Catalog page / Spec Sheet for the TK-480 (800 MHz) or TK-481 (900 MHz) handheld   704KB PDF
	Kenwood TK-480 / TK-481 900 MHz hand held service manual including parts lists   Revised for units with serial numbers after 30100001, dated March 2001   64 pages, 2.83MB PDF file, donated by A. Nony Mous TK-480/481 transceivers with a serial number of 30100001 or greater have a red triangle above the "W" in the KENWOOD logo label at the top of the front panel. You will also find the model name plate marked as “Ver 2.0” on the rear of the transceiver. You must use the KPG-49D to program Version 2.0 units. You cannot use the KPG-35D software for Ver. 2.0 radios. The KPG-36 cable is used with either software.
	Anybody know what the part number for the nylon or leather case ? Or the speaker-mic ? Is there a public safety speaker-mic (with the antenna on top of it) ?
Mobiles:
	Anybody have a step-by-step programming procedure for the 900 MHz TK-931 or TK-981 mobile?
	Catalog page / Spec Sheet for the TK-930 (800 MHz) or TK-931 (900 MHz)   891KB PDF, donated by A. Nony Mous. This is a very poor scan, anybody have a better one?
	Anybody have a PDF of the catalog page / spec Sheet for the TK-94n mobile ?   Or one we can scan ?
	Catalog page / Spec Sheet for the TK-980 (800 MHz) or TK-981 (900 MHz)   353KB PDF, donated by A. Nony Mous
	Anybody have a PDF of the owners manual / users manual for the TK-93n mobile ??
	Kenwood TK-840, TK-940 and TK-941 900 MHz mobile instruction manual undated   1.75 MB PDF file, donated by A. Nony Mous
	Kenwood TK-770 (VHF), TK-880 (UHF), TK-980 (800) and TK-981 (900) mobile instruction manual undated   1.1 MB PDF file, donated by A. Nony Mous
	Kenwood TK-941 900 MHz mobile service manual dated Aug-1994   6.2 MB PDF file, donated by A. Nony Mous
	Anybody have a PDF of the Kenwood TK-980 / TK-981 mobile service manual PN B51-8478-10 ?
	Kenwood TK-980 / TK-981 mobile service manual supplement dated Jan-2005   908 KB PDF file, donated by A. Nony Mous From the cover page: "This service manual applied to products with 30600001 or subsequent serial numbers. In terms of the products with the serial numbers earlier than 30600001, refer to the TK-980/981 service manual as per part No. B51-8478-10."
	Kenwood TK-980 / TK-981 mobile service manual supplement dated Jan-2005   908 KB PDF file, donated by A. Nony Mous From the cover page: "This service manual applied product with 50100001 (TK-980), 60600001 (TK-981) or subsequent serial numbers."
	The TK-931 mobile microphone is a KMC-2A or B, the DTMF mobile microphone is a KMC-18 or KMC-18A (it's a 12-button mic). The base mic is a KMC-9C.
	Anyone know the part number of the the TK-931 mobile mounting bracket ?
	The TK-981 mobile microphone is a KMC-27A or B, the DTMF mobile microphone is a KMC-28A (it's a 12-button mic). The "A" is significant as the KMC-28 has a different connector to the radio, the mic must be a KMC-28A. The base mic is a KMC-9C.
	Anyone know the part number of the the TK-981 mobile mounting bracket ?

Kenwood Land Mobile (commercial) Radio products:

www.repeater-builder is looking for information on the various models of current and older low band, high band or UHF Kenwood commercial mobiles, amateur and commercial repeaters with emphasis on: what the differences are between the various models how to identify the frequency ranges (i.e. how to tell if it's UHF, VHF, etc) which ones are crystal versus synthesized what makes one particular model better over another (i.e. which ones are a waste of time) what it takes to move them onto amateur radio frequencies if they aren't crystal controlled, information on how to program them (i.e. hardware programmer, PC program or front panel programming) would be appreciated, as well as what PC software do you need (and how to get it legally) If you have something to contribute, don't worry about your writing ability, your spelling, or anything else. Just write something up, even if it's just an email, and send it to us. We'll do the rest. Please read this article on writing for repeater-builder, then drop us an email. Examples: an email that became an article web page an Excel spreadsheet that became a reference web page a plain text file that became a how-to web page And the finished page will have your name as contributor at the top of the web page, and your name on the copyright at the bottom (for a sample see http://www.repeater-builder.com/mitrek/mitrek-6m-kd3ij.html).

What we have now:

Here is some general information on Kenwood model numbers courtesy of Gene Hornung WBØPKP: