908 deal with two probable causes; low VCO voltage, and PLL voltage. Kenwood TS-940S, TS-930S Repair, Modification, and Operation. shows again even when rotating the dial. Complete rebuilds from top to bottom, PLL and Power Supply repairs & updates, Replacement RF Drivers. 84v Q 31 = DTC124ES NPN (NTE2357) IN | OUT | GROUND |. Maybe there was a bad batch that Kenwood received but I wasn't paying enough attention in the various threads to determine the specific range of manufacture dates for those reporting the problem. The most predictable reason behind . This is a terrible design and a common problem for. 5 kHz audio tone at 5mV. The fix was to change parts around to match the schematic in the service manual! WA2JJH. But instead of having a main board and a few other boards the 940 has many boards, 6 PLL circuits. I had the dot problem that would cut in and out similar to what most on here see when the PLL's are not balanced. Support the channel and feel free to buy me a coffee, thanks!https://ko-fi. 84v Q 31 = DTC124ES NPN (NTE2357) IN | OUT | GROUND |. As I never heard about this problem, I decided to reveal it to the whole world. No AM operator should be without a basic scope. kenwood TS-940S free download Ham radio, amateur radio, two way radio, cb radio, walkie talkie service manuals and repair information. kenwood ts-940 sql problem. Payments: Credit, Debit Accept Also PayPal, Zelle. Put the covers back on the TS-940S and secure them with the 16 case screws. Once you get the speaker and control panel removed, then remove the cover for the digital A board housing. TS-940S erratic display. Web. This is a special own stock item. The most common problem that most of the Kenwood TS 940 users face is that the frequency is displayed in dots on the screen. USB (or serial) Programming cable connect the computer end. As I never heard about this problem, I decided to reveal it to the whole world. by N2MG on December 18, 2002. Kenwood TS-940SAT Almost everyone who owns a Kenwood TS-940, TS-440 and a few select other transceivers or even the R-5000 receiver will have heard, or experienced, the dreaded PLL wax potting curse. Repairing a Kenwood TS-940S - Resource Detail - The DXZone. Kenwood Ts 940S Owner S Manual. Maybe there was a bad batch that Kenwood received but I wasn't paying enough attention in the various threads to determine the specific range of manufacture dates for those reporting the problem. hi all I am looking for advice I recently bought a kenwood ts-940s my problem is I cant sql. Kenwood TS-940S Dot display problem, PLL out of lock. 76v ic9>pin3=1. in Menu mode, you will see, on the display, scrolling messages that tell what you are selecting. Web. TS940 AVR Board Mani Page While tuning up the unit for use and getting the microphone squared away, Bob and I smelled hot electrons. The TS940S along with other Kenwood transceivers are prone to a common fault - that of displaying a row of dots instead of a. #18 Kenwood TS 940 DOT on display Chasing down the rabbit hole Pt 1. Kenwood made a lot of TS-940's. The ALC alignment procedure in the Kenwood TS-940 Service Manual is seriously flawed. then you probably are dealing with the same problem. Delivery time: Courier Europe 5 days, America 7 days, USA and Canada 5 days. As you learn how to use this transceiver, you also will find KENWOOD is pursuing “user friendliness”. I found several solder joints that were fractured. Hello, I discovered an interesting problem recently with my TS-940S: it seems that the Low cut portion of the SSB Slope tuning no longer functions. Kenwood made a lot of TS-940's. Re: Ts-940 All problems SOLVED. The spacing between the pins is 1. Delivery time: Courier Europe 5 days, America 7 days, USA and Canada 5 days. The problem Kenwood TS-440 is designed as a mobile transceiver. But fixing the circuit of radio is not so easy as it appears to be. receive signals, but they are rather weak sounding and my s-meter does. But would purchase it on how well it worked now. I can assume that thousands of other TS-940S are also waiting to be corrected and perform. Welcome to the TS-940S group! Here we discuss practicalities, frustrations, and joy of putting these transceivers and similar models TS-930S, TS-930SAT, and TS-940SAT back on the air, using them, optimizing their performance, and modifying them. FS: Classic TS-940 w/ SP-940. But fixing the circuit of radio is not so easy as it appears to be. Kenwood radios, I have a TS-940, which had a few problems caused . Web. Fast Shipping. Adjusting the optimum output in CW Mode is performed using the CAR LEVEL control. Kenwood chose to use thermal detection on the PS and PA heat sinks to determine when to run the fans. T6-940S TRANSMITTER HUM IN SSB. Complete rebuilds from top to bottom, PLL and Power Supply repairs & updates, Replacement RF Drivers. Kenwood chose to use thermal detection on the PS and PA heat sinks to determine when to run the fans. Oct 16, 2019. Web. Kenwood TS-940S Ham Radio Transceiver. RE: TS940 antenna tuner stopped working - HELP. You won't find an AVR board for sale new -- you should endeavor to fix the. So once you locate the problem and narrow it down to one board it is not really that hard to repair. Subscribe! My Subscriptions Subscriptions Help. Kenwood actually preplaced one ham's TS-940 with a TS-950 because of this issue. Kenwood TS940 repair notes: Low power output and low sensitivity. By Robb Urie · 7:46pm. Web. com/theradioshopFollow mw on lbry. The RX audio is fabulous. com/theradioshopFollow mw on lbry. Web. Post by les-2e0dyy » 06 Oct 2016, 17:06. eBay has a wide selection of Kenwood amateur radio transceivers, including the TS 940, at very reasonable prices. First, check regulator Q103. Web. ZU VERKAUFEN! Einziges Problem: Ich habe das 12V/230V Stromversorgungskabel verbaselt. The procedure uses a fixed level of modulation input at the Mic connector, 1. Delivery time: Courier Europe 5 days, America 7 days, USA and Canada 5 days. In my opinion in it's day it had no rival. This could happen to anyone that has the TS-940. N ow downloading free:kenwood TS-940S. Date 1 - 20 of 589. . 3 W) and Q4 Q5 (2nd balanced mixer, also 2SK125). Clint. Web. I picked up the TS950 in the hopes that it did not share the same traits as the TS940 unlike the TS930 and TS940 that shared some of the same (production?) problems. Hello Everyone, I'm having a problem with my Kenwood TS-940S, in that I can. Every possible function has been adopted to eliminate radio interference. Looking for a qualified tech for the 940. it's time to drag my TS-940 kicking and screming into the 21st century. As I never heard about this problem, I decided to reveal it to the whole world. 20 meterband TS 940 Power Supply Upgrade Part 1 #18 Kenwood TS 940 DOT on display Chasing down the rabbit hole Pt 1 Kenwood TS940S Computer kontrolle und Wasserfall / Control and Panadapter or you can build your own. The symptoms, in my case, were a dead radio. But would purchase it on how well it worked now. there are three. Clint. It was also wrong in the PC board view pictures in the Service Manual. Es lässt sich problemlos 364146204004. Kenwood TS-940S Transceivers: User Guide. Adrian Chadd. receive signals, but they are rather weak sounding and my s-meter does. Entdecke Geprüft Kenwood TS-570S SG Version up DRU-3A 500Hz CW Filter Transceiver Schinken in großer Auswahl Vergleichen Angebote und Preise Online kaufen bei eBay Kostenlose Lieferung für viele Artikel!. Hello Everyone, I'm having a problem with my Kenwood TS-940S, in that I can. When I turn it on, the freq. Kenwood TS-940 and TS-930S Group | Facebook. Support the channel and feel free to buy me a coffee, thanks!https://ko-fi. it is on the heatsink for the power supply. KENWOOD TS-940S Repair PART 1 Radionut63 3. The TS-940 is a triple conversion receiver design, so If you can hear a signal at all, the receive circuitry is working, but your sensitivity is low, which typically indicates the problem is right at the antenna input. 5 out of 5 stars. If it is found to be intermittent, remove the socket and solder the ROM directly to the board. A Compendium of Information - W3AFC. more #18 Kenwood TS 940 DOT on display Chasing down the. 5 out of 5 stars. kenwood ts-940 sql problem. Oct 27, 2022 · kenwood ts-940s serie708xxxx pll 50-2020-00 board ic19>pin2=4. I have a lovely 940 that has a couple of problems. 40K views 6 years ago In this video I have a TS-940 that has the dreaded dots on the display. The upgrade board has 2 switching power supplies on board for 9V and 5V. it would loose lock wan the. 52 postage. The fan control logic in the Kenwood TS-930 and TS-940 is a very poor design. 37v not working (1. I checked for the pin 2, pin 7 voltages on the 4 known IC's. Web. by carlos-838 Mar 17, 2017. Web. The picture above was scanned from the TS-940S Service Manual, Revised Edition. The rig seems to work (on receive, there is an unrelated problem on transmit) on the higher frequencies, LSB. In this video we look at a TS-940 with low receive. 82v ic8>pin2=1. The TS-940 can be very intimidating when the covers are removed and one looks in. Manufactured in 1986 this transceiver was the top of the line Kenwood radio until it was usurped by the TS950DX. The socket should be checked to insure that it makes good electrical contact with each pin of the ROM. by N2MG on December 18, 2002. And other. Dec 31, 2017. Web. In Step 1, the procedure has you set the Mic Gain VR to MAX, but then instructs you to engage the SEND switch and adjust VR8 on the CONT unit to set the ALC. Kenwood TS-940S. The Kenwood TS-940S/AT was manufactured at and after 1986. I had the dot problem that would cut in and out similar to what most on here see when the PLL's are not balanced. Replacement lcd lamp for the clock display for TS-940. The socket should be checked to insure that it makes good electrical contact with each pin of the ROM. io Welcome to the TS-940S group! Here we discuss practicalities, frustrations, and joy of putting these transceivers and similar models TS-930S, TS-930SAT, and TS-940SAT back on the air, using them, optimizing their performance, and modifying them. Problem with TS-940S Display by Don Wi » Wed, 26 Mar 1997 04:00:00 The problem was found and fixed. The primary reason for this was apparently noise, the Kenwood fans are not designed to limit blade or motor noise. Left to right Q103, Q104, IC101. Any help would be greatly appreciated. It won't work on USB at all. The calibration marker circuit is. This is the 1st TS-940S that I could observe and analyze in detail. The problem Kenwood TS-440 is designed as a mobile transceiver. I picked one up at a swap meet a few years ago and it still receives unsolicited compliments on the TX audio. com Home Manufacturers Kenwood TS-940S Kenwood TS-940S Desktop Shortwave Transceiver Specs Manuals (3) Reviews (1) Prices (3) Compare Add a review Add to my shack Login or Register to upload images Find Kenwood TS-940S rigs and spare parts on eBay Find the Kenwood TS-940S on Amazon. The Kenwood TS-940S is a serious radio for the serious operator. Check related links to this in Radio Equipment/HF Transceivers/Kenwood TS-940S A page dedicated to fixing problems on the Kenwood TS-940S by G4URH. The best thing you can do at this point is a bit of troubleshooting of the signal path. Kenwood TS-940S, TS-930S Repair, Modification, and Operation kw-ts940s@groups. The bonus is that the tuner acts as a preselection for the RX. kenwood ts-940 sql problem. The one just to the left of it has already been removed, as it too was cracked. In Step 1, the procedure has you set the Mic Gain VR to MAX, but then instructs you to engage the SEND switch and adjust VR8 on the CONT unit to set the ALC. then you probably are dealing with the same problem. This all mode transceiver covers 160 to 10 meters with a general coverage receiver. 5 kHz audio tone at 5mV. As I never heard about this problem, I decided to reveal it to the whole world. by Andy Vavr » Tue, 11 Feb 1997 04:00:00. When the 940 is up and running again, I will upgrade the 930 as well. Entdecke kenwood ts 940s Radio Tx Rx Om Ham Cb Apparato No Yaesu Icom Drake Collins in großer Auswahl Vergleichen Angebote und Preise Online kaufen bei eBay Kostenlose Lieferung für viele Artikel!. So it is sold as is. #129 Kenwood TS 940 Low Receive The Radio Shop 22. The RX audio is fabulous. Web. I'm having a problem with my Kenwood TS-940S, in that I can receive signals, but they are rather weak sounding and my s-meter does not deflect to show their signal strengths. Verified purchase: Yes | Condition: Pre-owned. hi all I am looking for advice I recently bought a kenwood ts-940s my problem is I cant sql. No problems at all!. Web. 20 meterband TS 940 Power Supply Upgrade Part 1 #18 Kenwood TS 940 DOT on display Chasing down the rabbit hole Pt 1 Kenwood TS940S Computer kontrolle und Wasserfall / Control and Panadapter or you can build your own. WTB: SP-940 (Speaker for KWD: TS-940) 7. Requests: 1. The socket should be checked to insure that it makes good electrical contact with each pin of the ROM. Aug 1, 2015. not deflect to show their signal strengths. In Step 1, the procedure has you set the Mic Gain VR to MAX, but then instructs you to engage the SEND switch and adjust VR8 on the CONT unit to set the ALC. 5 kHz audio tone at 5mV. pdf Not sure if this may help or not. The symptoms, in my case, were a dead radio. If you open up your Kenwood TS 940, turn it on, find it dead and not working at all. In today's inflation that would be around $6,492 ( source: DollarTime ) The reviews were unquestionably stellar wherever you go, from eHam to individual ham operators. TS-940 Instruction Manual - WB4HFN. PLL unlock in the TS-940 has been a known problem. I have two things to say. 59 d9=4. Browse answered Kenwood TS-940SAT questions, problems & issues. The primary reason for this was apparently noise, the Kenwood fans are not designed to limit blade or motor noise. John listened for carrier and opposite sideband surpression problems. it is in the rear left corner of the rig as the. Mail this to a friend! Doug, I'd start by looking into the reverse-power-measuring circuit - to see if there's any reverse power being detected. Connect the antenna and power cord then test the transceiver for normal operation. Kenwood Inter face -232C. Availability: Immediate. it's time to drag my TS-940 kicking and screming into the 21st century. The problem Kenwood TS-440 is designed as a mobile transceiver. Subscribe! My Subscriptions Subscriptions Help. hi all I am looking for advice I recently bought a kenwood ts-940s my problem is I cant sql. TS-940 PLL Unlock repair hints. When the 940 is up and running again, I will upgrade the 930 as well. This is a great radio with receiver specs comparing well with the top 5 receivers made today. This group is for both, and I mistakenly described the TS-930 wiring. receive signals, but they are rather weak sounding and my s-meter does. I began to wonder last year why its Rx was weaker than the other Kenwood HF rigs or Icom. The one that's got me asea is involved with PLL. TS-940S erratic display. Web. these radios. I also noticed that a FET was It was as simple as de-soldered and turn the FET 180° and. tk maxx australia online
I have a Kenwood TS940S HF rig and I have a question about SSB filters. . Kenwood ts940 problems
Ever since I had the radio (4 years ago), the LCD display fades in. We will give it a try!. Web. The actual problem is 1 to 3 bad filters. KENWOOD TS940S AND TS940SAT MODIFICATION. This is a terrible design and a common problem for. Replacement lcd lamp for the clock display for TS-940. Kenwood TS-940s AVR board, by N0XWR on February 28, 2006. This image shows the old battery removed and the pins cleaned up for the replacement. Web. I picked up the TS950 in the hopes that it did not share the same traits as the TS940 unlike the TS930 and TS940 that shared some of the same (production?) problems. 71K subscribers Subscribe 6. I checked for the pin 2, pin 7 voltages on the 4 known IC's. When joining the group, please consider introducing yourself with a post about your interests and/or experience with one (or more!) of these radios. General coverage receiver section tunes from 150 kHz -30 MHz. So it is sold as is. The error is on the IF board: Kenwood printed labels for R149 and R150 around the wrong way!!! As assembled by the factory, (the outcome is) in the main signal path, a 2,200 Kilo-Ohm resistor ends up where a 150 Kilo-Ohm Resistor should be. FM or FSK)V 4. The "AT" after the S is for Antenna Tuner. If the frequency is changed, the correct display will appear but return to Decimal Points within 2 seconds. If your looking for a great classic and are willing to spend 6-$800. This is a terrible design and a common problem for. Payments: Credit, Debit Accept Also PayPal, Zelle. Kenwood TS-940S SPECIFICATIONS GENERAL Type: Amateur HF transceiver Frequency range: TX: 10-160 m + WARC RX:. This is the 1st TS-940S that I could observe and analyze in detail its circuits. Ask Steve WA1QIX about the distortion he found on a Yaesu FT-101 and the mods he did to get that balanced modulator right. com Warranty Returns Policy Disclaimer K6IOK Repeaters More. This group is for both, and I mistakenly described the TS-930 wiring. Trio- Kenwood has succeeded in achieving the highest. Post by les-2e0dyy » 06 Oct 2016, 17:06. Once you get the speaker and control panel removed, then remove the cover for the digital A board housing. Ever since I had the radio (4 years ago), the LCD display fades in. Although they had a few issue's on the earliest run's, all were fixable and as the serial numbers grew the issue's went away. Use COM port 1 if connecting to the radio's rear DB-25 port. Oct 11, 2020. A Kenwood TS-940SAT with auto-tuner installed caught my eye, but there's no ballpark price listed. Not sure if you resolved your particular PLL issue, but I was successful in tracking down the PLL issue with my TS-940 after much research. not deflect to show their signal strengths. 1K views 1 year ago Kenwood TS-940S Dot display problem, PLL out of lock. The TS940S along with other Kenwood transceivers are prone to a common fault - that of displaying a row of dots instead of a. Get one without the well-known cold-solder problems and you’ve got a gem. Adjusting the optimum output in CW Mode is performed using the CAR LEVEL control. Payments: Credit, Debit Accept Also PayPal, Zelle. Web. Here's some pictures showing what to watch for: The slug in the coil form in the lower right (pink) is cracked. You won't find an AVR board for sale new -- you should endeavor to fix the. The best thing you can do at this point is a bit of troubleshooting of the signal path. 8v) ic9>pin2=4. PLL unlock in the TS-940 has been a known problem. Handling time: 8 Days. Web. The "AT" after the S is for Antenna Tuner. Delivery time: Courier Europe 5 days, America 7 days, USA and Canada 5 days. io Welcome to the TS-940S group! Here we discuss practicalities, frustrations, and joy of putting these transceivers and similar models TS-930S, TS-930SAT, and TS-940SAT back on the air, using them, optimizing their performance, and modifying them. TS-940S SSB Slope Tuning 6. Delivery time: Courier Europe 5 days, America 7 days, USA and Canada 5 days. by N2MG on December 18, 2002. Further, the MRF-485 Kenwood used in the TS-930S and TS-940S is a low-h FE grade of the part that often difficult and expensive to obtain. When you look at the radio, all you can see is a complex of wires, and there is no apparent way to fix it. Details about the radio from the Kenwood website The TM-742A/E has a maximum output of50 watts (2 m) and35 watts (70 cm). I have a lovely 940 that has a couple of problems. Availability: Immediate. The one just to the left of it has already been removed, as it too was cracked. It is the very same purple core device as in the TX chain. The TS-940 can be very intimidating when the covers are removed and one looks in. 951 (20-1-1989)Intermittent control or display problems that are difficult to correct with the reset procedure may be caused by a faulty ROM socket. A Compendium of Information - W3AFC. signals sound great and the s-meter does work properly. sub-optimal, and picks up a lot of stray, random noise throughout. This is the 1st TS-940S that I could observe and analyze in detail. Entdecke Kenwood T599D/R599D HF Zwillinge mit Zubehör. Web. My radio was working apparently well. Web. The "AT" after the S is for Antenna Tuner. A Compendium of Information - W3AFC. Apr 10, 2001 · Hello Everyone, I'm having a problem with my Kenwood TS-940S, in that I can receive signals, but they are rather weak sounding and my s-meter does not deflect to show their signal strengths. Here's a close-up showing the cracked (and immovable) core. Not sure if you resolved your particular PLL issue, but I was successful in tracking down the PLL issue with my TS-940 after much research. The ex option would be that the antenna tuner is in line with the RX front end in RX mod. Superb interference reduction circuits and high dynamic range receiver combine with superior transmitter design to get your signal through. In the case of the TS940 there are a total of 6 phase lock loops, any one of which could be out of lock and cause the 'DOT' problem. com Warranty Returns Policy Disclaimer K6IOK Repeaters More. 71K subscribers Subscribe 6. RE: TS940 antenna tuner stopped working - HELP. I checked for the pin 2, pin 7 voltages on the 4 known IC's. A Compendium of Information - W3AFC. io | Kenwood TS-940SAT with Low Output on Lower Bands Home Messages Hashtags kw-ts940s@groups. The TS-940S is a nice radio, but it is plagued with connector problems, . Web. The fan control logic in the Kenwood TS-930 and TS-940 is a very poor design. Minor problems (fast clock, blown bulbs, etc) $550 or so. Kenwood TS-940S. signals sound great and the s-meter does work properly. 3 W) and Q4 Q5 (2nd balanced mixer, also 2SK125). The manual has 96 pages; File. This is the 1st TS-940S that I could observe and analyze in detail. Minor problems (fast clock, blown bulbs, etc) $550 or so. This was definitely not the case as I suspect the radio was never opened before. its circuits. No AM operator should be without a basic scope. Payments: Credit, Debit Accept Also PayPal, Zelle. The socket should be checked to insure that it makes good electrical contact with each pin of the ROM. 1A, 0. A Compendium of Information - W3AFC. This is the 1st TS-940S that I could . The picture above was scanned from the TS-940S Service Manual, Revised Edition. First, check regulator Q103. Web. The fix was to change parts around to match the schematic in the service manual! 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