Ts 940 dots display. 15-30 MHz Tuning steps: Down to 10 Hz: .

Ts 940 dots display Kenwood TS-940S Transceivers: User Guide. IC4 Pin 4 low indicates the phase comparator is not locked, and IC15 Pin 9 low indicates that TS-940S LCD Clock Display Erratic Operation Early models of the improved IC will carry the old nomenclature but will be distinguished by a white dot on the top of the chip. Built-in 24 hour digital clock with timer All-in-one type construction containing all components from AC power supply to speaker UAL: G'day all, My TS-940's main display has even brightness across all segments when the DIM button is depressed (they are all the same level of dim), but it has alternating dim and bright lines the full width of the display when NOR is selected - like looking through horizontal Venetian blinds. I have a display problem with my TS 940S. If you prefer to be anonymous write it in the message. 399. When joining the group, please consider introducing yourself with a post about your interests and/or User comment ts-440 dots only on display. Re: #15 Kenwood TS-50 part 2 Display board repair « Reply #1 on: November 29, 2015, 07:02:35 pm » I am really looking forward to seeing your technique for repairing pads and traces you mentioned in the first TS-50 video. After the IC has been changed reset the main microprocessor by pressing and holding the A=B key, direct swap for the older Motorola "red dot" MRF485's. Frequency Display. The display produces dots instead of the normal frequency displayed numbers. However, the TS-940S uses 28 V transistors to im- prove both electrical performance and reliability. 5x5dotso. Delete from my manuals. 5 out of 5 Kenwood TS-440S (TS 440 S TS440S) Displays dots on certain bands Kenwood TS-440S (TS 440 S TS440S) Circuit Improvements Kenwood TS-440S (TS 440 S TS440S) mod for improved receive sensitivity of 0. You can do an internet search for TS-940 power supply and find lots of information online about these things all with the dreaded DOT problem and I have yet to find the time to get through them. dot. Accessories. 40 Show all keyboard shortcuts. dk: Advertising : Main Menu: Login : Modification : Homebrew : Forum : Manuals : Pictures : The symptom you have is the classic PLL Unlock, and should be represented by the frequency display showing only dots, but will briefly display the frequency if you turn the main encoder dial. (2) One of the LEDs is not illuminating. TS-930S transceiver pdf manual download. (6-08) www. Was a problem on the PLL board. PD2AHQ Rating: 2022-02-07; TS-940S LCD Clock Display Erratic Operation Early models of the improved IC will carry the old nomenclature but will be distinguished by a white dot on the top of the chip. Topics manualsbase, manuals, KENWOOD TS-940S DISPLAY FLASHING REPAIR THESE BOARD TO FIX THE PROBLEMThis video will show where the problems are that causes the display to flash and/or go i had been running another beauty, the ts 940, 10million series, and that was a truly great radio. We have a great online selection at the lowest prices with Fast & Free shipping on many items! Skip to main content. dk, please send the information to mods. this was an intermittent problem which has got really bad now the radio is unusable. com hosted blogs and archive. 14. View and Download Kenwood TS-940S instruction manual online. 1 MHz) Phase Locked Loop (PLL) Circuit This is a digital Variable Frequency Oscillator (VFO) covering 45. drift, blank display). $16. dk. The extra 1. They flicker at random times very quickly (all at once). Cheers Dave-- I currently have a TS 940S . Set the TS-440S' selectivity switch to M2, the single filter position. 500MHz ( the display shows dots - below 14. There are six PLL's in the TS-940, four are located on the PLL Howard It is obvious that your TS-930S is equipped with the PIEXX Digital Unit, which is the source of the "PLL" message. pdf updated #file-notice kw-ts940s@groups. When I powered up the unit the display shows-up however there is no receive nor can I transmit. I will check this on another TS-930 tonight to be sure. The website has been updated. Overview. in Techno > LCD 80,507 downloads (11 yesterday) 2 comments Free for personal use - 2 font files. OOMHz : 8V 01 PROLOGUE About the Release of the TS‑990S Since the TS‑900 was launched in 1973, the Nine Hundred series of KENWOOD (TRIO) transceivers has been our flagship high‑end HF transceivers. The "AT" after the S is for Antenna Tuner. However, the most important first step to repairing the problem is to identify which of the six PLLs is the source of the fault. Digital a Unit Control Rogic Diagram. After the IC has been changed reset the main microprocessor by pressing and holding the A=B key, TS-940S ALIGNMENT INSTRUCTIONS TRIO-KENWOOD CORPORATION OPRINTED IN JAPAN B50-8048-OO(K, M, W, X) the display from 20MHz to 29. 6MHz Kenwood TS-940S (TS 940 S TS940S) service manual and specs Kenwood TS-950S (TS 950 S TS950S) A pair of TS-940 SSB filters will give the 440 the same superb selectivity that comes with the 940. When I press the bandswitch Some users of the TS-940S have reported a blanking of the display accompanied by a loss of transmit and receive. Group A is a primary function group with most of the commonly used keys. I haven't had to fix my TS-940 PLLs but I've fixed plenty of TS-440s and TS-430s where I've had to find suitable replacement equivalent-ish transistors and cap/resistor/inductors in the PLL/VCO loops because that gunk corroded components and the /legs/ of components. 0. I didn toggle quoted message Show quoted Kenwood TS-940S HF ham radio transceiver. 18. I just changed the backup batteries behind the faceplate and the problem seems to have gone away. The TS-940S operates from 120 VAC. Young, W3AFC Rev. Started after updating LED on sub panel w/ new battery and LED on Meter. TS-940S transceiver pdf manual download. My fix based on visual inspection was to re-solder all the joints on the underside of the Just this weekend, my TS-940S/AT started acting very strange. Add to my manuals. Hi everyone. 3 ver I have a slight flickering of the 940's display when connected, however this is a software issue, Winlog32 has a builtin cluster and you can click on the spots and the rig goes to them, really neat. stability (receive 14. The output characteristic of the TS-940S is shown in Figure 33 A transistor's IMD indicates its linearity. TS-940 Mod for MARS and all band operations Locate IC number 109. Please MAKE AN OFFER: My email: h~~~~@k~~~~. 95 shipped to USA lower 48. $40. Model TS-940S NOTES: 1. ctrl + g : Navigate to a group. However, the RC-2000 mobile controller has only 12 keys and 5 controls. us PennDOT Publication 31 Special Hauling Permit Manual Page 1 TABLE OF CONTENTS CHAPTER 1 and in this paper we show that a case can be Large fluorescent display and. If the timer switch is set to ON, Sub-display consists of a 2-line, 16 digit liquid crystal dot matrix. 5x5dots. oldhamdave. The 2-pin and 10-pin connector are properly re-seated. I apologize, the info I gave you about wiring was for the TS-930, not the TS-940. Mankhoff, N6BIZ Mike Hutchins, ZL1MH Dave Phillips, KB7JS Marcel De Vuyst, ON7DY Luis Kenwood TS-940S Price and Specifications. Keyboard Assembly. My TS-940 (I'm the original owner) works at least as good as new. Download Table of Contents Contents. e. Circuit Diagram - Throughout the life of the TS-930/TS-940, these failures have become well known and many attempts have been made to tame the power supply and limit failures. There are actully 6 PLL's in the TS-940, and any one of them can cause the UNLOCK condition that renders the frequency display as a row of dots. While the rig is warming up, the display alternates between Kenwood TS-940S. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright TS-940S - Repair 2017 - 1 - 30 Document by David Lowrance AL5X. A place to discuss all aspects of amateur radio operation. Setting the Clock. Kenwood TS-940S (TS 940 S TS940S) LCD Clock Display Erratic Operation: Early models of the improved IC will carry the old nomenclature but will be distinguished by a white dot on the top of the chip. ctrl + shift + f : Find. Flag. I think this one will be with me for the rest of my Life. The Kenwood TS-940SAT features a built-in automatic antenna tuner covers the amateur bands 160 through 10 meters. Do you have any tricks, modifications or constructions for homebrewed equipment that are not on mods. - PLL unlock with Dots on Display - Batteries Exchange - Wax removal on VCO and Heterodyne Search help: Support (FAQ) How to donate: Help mods. 900+ solder joints reflowed !! VCO5 cleaned out completely !! I can't tell you which was worse. /Kenwood TS-940 Adjustment Procedures/KB7JS Kenwood TS-440S (TS 440 S TS440S) Displays dots on certain bands: The reason for this is well known and covered elsewhere. The socket should be checked to insure that it makes good electrical contact with each pin of the ROM. Circuit Diagram - capacitors/resistors that are corroded. All-in-one type construction containing all components from AC power supply to speaker . Digital a Unit Block Diagram. It is not uncommon for the failure of a pass transistor to also cause catastrophic failure of the AVR, sometimes generating an alarming amount of smoke and FIRE. , warble or make the display go blank. 00. Aiee. When you start seeing displays like this, start getting suspiscious of the battery on the back of the assembly . Note that page can take a while to load, if there are many modifications. I have a TS-940 that had the same problem (freq. 73, Francis WA4ZYN. Everything works great just this one section doesn't light up. Wonky display on my 940. 5MHz. Hi signal (close to 4. ctrl + / : Quick actions. There’s a very nice write-up about this, applicable to at least the TS-930 and TS-940: TS-940S - Repair 2017 - 1 - 30 Document by David Lowrance AL5X. Steve Well, it could be the display, they can eventually dim with age, but its usually universal, not just one to the grids. 6MHz Kenwood TS-940S (TS 940 S TS940S) service manual and specs Kenwood TS-950S (TS 950 S TS950S) Kenwood TS-940S Price and Specifications. Compudigital provides easy to install repair power supply upgrade kits for the Kenwood TS-930 and TS-940 transceivers. Yes, I bought a TS-940 and have been trying to diagnose hilarity. When the display flashes and /or goes out and DOTS ar TS-940S “Dreaded Dots” Troubleshooting By Dave Lyndon, AK4AA www. 7: 02/18/2017 Contributors (To date, in order of appearance) Gary J. 2k which lets the tracking diode's have better control on the bias's. The LCD display bulbs don't flicker, but they Kenwood TS-940s AVR board, by N0XWR on February 28, 2006 You won't find an AVR board for sale new -- you should endeavor to fix the View and Download Kenwood TS-940S instruction manual online. GENERAL: Type: Amateur HF transceiver: Frequency range: TX: 10-160 m + WARC RX: 0. 6MHz Kenwood TS-940S (TS 940 S TS940S) service manual and specs Kenwood TS-950S (TS 950 S TS950S) Kenwood TS-940S (TS 940 S TS940S) LCD Clock Display Erratic Operation: Early models of the improved IC will carry the old nomenclature but will be distinguished by a white dot on the top of the chip. Subject: Re: [kw-ts940s] Dots on screen no frequency readout no rx no tx PLL Unlock is a chronic problem with aging TS-940's, usually caused by It is essential to determine which PLL's are unlocked, any one of which will produce the dreaded "Dots" on the display. I have replaced all the battery`s and re-seated and cleaned the E Prom, everything inside the rig is mint, no battery damage nothing , its a 1 owner from new who cherished all his gear sadly has passed away, i have watched 30 hours of videos on you tube and nothing seems to work any ideas. The Sub-Display currently has two problems - I think they are unrelated - but this is a guess. CAUTION, attempting to lube the Encoder shaft is a very bad idea, any lubricant will seep inside and contaminate the IR sensors. The LED's cathode is soldered to the negative point. 8 DC power supply used samples CAN suffer from the notorious PLL unlock / VCO potting compound failure (dots on display) and the not as serious keyboard bounce The one thing I did do is modify the bias circuit per kenwood TS-940 service bulletin SB-988 it amounts to changing R-16 from 1. Ive lived with this for a while, but I W4VD 2005-04-15; RE: TS-940S Production Errors Found; I have one of those solid state rigs you say have trouble with the SB220, I have had 2 before and ran solid state with no problem *ts 930 and 940* but with an Alinco DX80TH I simply cannot drive it, I was thinking the inputs hadn't been aligned, but I would like more info on that if you would be so kind as to post it, or e-mail Recently when i first turn the radio on i have the dots in the display, all bands freq readout when vfo dial is turned then dots when stop. The reality is that the 'Dots" problem can be caused by a number of factors independent of the PLL Unit. 6MHz These Instructions are TS-440 specific, but the basics also apply to the TS-940, TS-811 and TS-711. B Adjust until inter- vals D and E are equal to each other with point C placed at the center. If I turn my tuning knob frequency will appear but go right blank again . 5 to 1. When you turn on the radio, the only thing that . sub-optimal, and picks up a lot of stray, random noise throughout the radio. With the so-I installed, overall frequency stability is upgraded to a level approximating professional standards. state. g. Not related to Early models of the improved IC will carry the old nomenclature but will be distinguished by a white dot on the top of the chip. The TS-940S PA is mentioned here because both amps use the exact same board. Group B Keys. If you have some reasonable soldering skills and can follow instructions, this might be the kit for you! Please Summary of Contents for Kenwood TS-940S Page 1 Button/Knob Initial Setting function Manual Reference fcw means fully clockwise fccw means fully counterclockwise POWER OFF (out) check external power switch TIMER clock, ON/OF, 24 hr event 37,38 VOX/MAN MAN (out) sound-actuated transmission FULL/SEMI CW break MONI allows monitoring of xmit signal 8,10,14,16 Great deals on Kenwood Ts 940. which in turn will cause the Frequency display to blank and display a row of dots. 15-30 MHz Tuning steps: Down to 10 Hz: 20 Kg (44. One VCO was not locking - easy to find which one it is but why Kenwood TS-940S (TS 940 S TS940S) service manual and specs Kenwood TS-950S (TS 950 S TS950S) View and Download Kenwood TS-930S service manual online. The TS-940 has a history of problems In this video I have a TS-940 that has the dreaded dots on the display. If the Click here to view all the ABOVE modifications for ts-940 in one page. The actual black liquid crystal letters fade away almost completely and then fade back in, randomly. Amateur 160-10m all-mode transceiver with 100 Watts power output. Find many great new & used options and get the best deals for Kenwood TS 940S Radio Transceiver at the best online prices at eBay! Free shipping for many products! Skip to main Common item is burned out lamps especially the sub-display. Look for a good one. View all glyphs (176) Kenwood TS-440S (TS 440 S TS440S) Displays dots on certain bands Kenwood TS-440S (TS 440 S TS440S) Circuit Improvements better-sounding, and more understandable, audio than the Kenwood-recommended optional YK-88-S, 2. Bob K6DDX On Monday, October 18, 2021, 09:13:23 AM PDT, Joe Della Barba <joe@ not necessarily, but it is a good sign. 0000 Mhz. The correct way would be to use a good voltmeter and follow the service manual for this adjustment. If this TS-940 was originally sold in Great Britain or anywhere in the EU, No dots on the display now (they had been coming and going intermittently). ts-940s vco/carrier to noise ratio improvements ts-940s ssb talk power improvement s/n 601xxx-708xxx more ts-940s erratic display (remove the rom socket) more ts-940s mrf-485 driver transistor changes (blue dot) more ts-950 Three new capacitors for the Kenwood TS-930 or TS-940 AVR power supply board. Display Data. . Subject: Re: [kw-ts940s] TS-930S PA Board config Steve Outstanding, please keep me up to date at your convenience on your progress, I am always interested in the restoration of these fine radios. Click here to see the article list for TS-440. 951 (20-1-1989) Unfortunately, the PLL Unit gets all the blame for the dreaded "Dots" problem in the TS-940, and for the Blank display in the TS-930. This is caused by one or more Dot display problem is a Common Fault on the TS range, google and you will find lots of repair ideas. Dual displays Main display is a large, two color -fluorescent dis- play. Be prepared and able to communicate in case of emergency with the largest selection at eBay. The go The weak spots are well known but easily fixable, Well, it is now 2021. I've owned several 440's and have been lucky enough not to have experienced a pll unlock. Discontinued! Replaced by the TS-950S. Frequency resolution: 10 Hz Frequency stability: 10 PPM Transmitter: Power input: 250-W PEP (160-10 m bands, ssa, Fig 2—Specttal display of the TS-940S output during transmltter two-tone intermodulation distortion (IMD) test. File /Kenwood TS-940 Adjustment Procedures/KB7JS TS-940 Alignment Procedures - Version 5. A pain to change, but can be done. Kenwood TS-440S (TS 440 S TS440S) Displays dots on certain bands Kenwood TS-440S (TS 440 S TS440S) Circuit Improvements Kenwood TS-440S (TS 440 S TS440S) mod for improved receive sensitivity of 0. 4kHz filter. When I turn it on, the freq. 6MHz Kenwood TS-940S (TS 940 S TS940S) service manual and specs Kenwood TS-950S (TS 950 S TS950S) The TS-940S is a competition class HF transceiver having every conceivable feature, and is designed for SSB, a large fluorescent tube digital display with analog-type sub-scale for frequency indication, new dot-matrix LCD sub-display for showing graphic characteristics and messages, all serve to provide maximum flexibility and ease of TSD 128*64 COG mono display module 128*64 dots Resolution 6 O’clock View Direction; TSD FSTN Grey 256x128 dots Graphic Lcd Module; TSD big dots matrix 320x240 Graphic Lcd Module; TSD 256x128 dots graphic lcd display STN Blue display; TSD 320x240 dots Matrix COB LCD module with bigger size; TSD 122x32 Monochrome Graphic Lcd Display Module. 2, Built-in 24 hour digital clock with timer 3. When this happens, The Kenwood TS-940S/AT was manufactured at and after 1986. 8V) says it is Locked, dots are coming from another VCO, not VCO5. Sign In Upload. It is essentially a switching power supply that converts the 21V DC line into Kenwood TS-440S (TS 440 S TS440S) Displays dots on certain bands Kenwood TS-440S (TS 440 S TS440S) Circuit Improvements Kenwood TS-440S (TS 440 S TS440S) mod for improved receive sensitivity of 0. These caps are known to fail, other caps in radio do not. The one on the Digital "A" Unit retains the dynamic memory used by the MCPU that retains operational settings. 17. io group. Can be as simple as going in and wobbling all the ribbon connectors or reflowing the solder joints on the PLL board (there were early techniques mechanized soldering and solder types that didn't last), or something in parts could be failed. I don't see any If the display dot problem only shows up on some but not all band, send me a note and I will see if I can help you. Service Bulletin no. At the time Kenwood considered it their top of the line competition class HF radio until it was later surpassed by their newer model TS950DX. I tried to get a good picture, but the display was too bright to show the difference, so I modified Kenwood TS-940S Caratteristiche e Prezzi. On the TS-930, the four-wire cable is routed to the Digital Unit,m on the TS-940, it is routed to the Digital "B" Unit. A pair of TS-940 SSB filters will give the 440 the same superb selectivity that comes with the The TS-930 is a digitally synthesized radio utilizing Voltage Controlled Oscillators driven by Phase-Locked Loops to produce accurate frequency selection. The TS-940 does not have the 28v/21V distribution terminal strip. Disabling the Timer. Sub-display consists of a 2-line, 16 digit liquid crystal dot matrix. 6MHz Kenwood TS-940S (TS 940 S TS940S) service manual and specs Kenwood TS-950S (TS 950 S TS950S) Hi all Kenwood owners, My main display has one section that won't light up (#6). Programming the Timer. I have been perfectly happy with his service, everything came back working first class. The calibration marker circuit is . Also for: Sp-930, At-930 NO. After doing the regular checks for signals and voltages on the PLL's I decided to start looking for other issues that I got a TS-940S in Serial # 603XXXX series that has the "dot" problem. Timer Functions. : TRIO-KENWOOD COMMUNICATIONS VON/FROM/DE: Division of TRIO A COMPENDIUM OF INFORMATION ON REPAIRING YOUR OWN KENWOOD TS-930S TRANSCEIVER (MUCH OF WHICH SHOULD APPLY TO THE TS-940S AS WELL) By John P. View online or download Kenwood TS-940S Ham Radio Transceiver Instruction Manual. I had my TS-940 in storage for almost 10 years after retiring, and relocating to a new QTH. The TS940S along with other Kenwood transceivers are prone to a common fault - that of displaying a row of dots instead of a frequency readout. 19-07-1998 TS-940S Erratic display Author: Trio-Kenwood Communication, inc. Kenwood TS-440SAT "Dreaded dots problem" After 35 years of faithful, trouble-free service, my 440 has developed the dreaded dots problem. Ricetrasmettitore all-mode per 160-10 metri con 100 Watt di potenza. Chapter 5 Cycling the Key Groups. The Kenwood TS-940S is the same as the TS-940SAT except without the automatic antenna tuner. Reload Home Messages Hashtags TS-940 repair services? Kenwood TS-440S (TS 440 S TS440S) Displays dots on certain bands Kenwood TS-440S (TS 440 S TS440S) Circuit Improvements Kenwood TS-440S (TS 440 S TS440S) mod for improved receive sensitivity of 0. 4999, 19. In order to access all the available functions of the transceiver from the RC-2000 mobile controller, the functions are divided into 3 groups: A, B, and C. Alignment: Supply a signal to the receiver. Co MPU Data. The only tools that are needed for For this reason after repairing my unit, he would no longer consider repairing this model. inconvenience only — no da- A common issue with Kenwoods of that era. Memories ARE working. Band, Frequency, Mode, etc; When you encounter the strange behavior of the buttons, do a general reset. pdf By: Dave Phillips <utahdog@> Description: New update TS-940 Sub display LED mod: Author: W9DKC: Product: Kenwood TS-940S: Short Description: Upgrade from lamp to LED: Detailed Description: It's a simple mod that makes the display much easier to see and the LEDs will last much longer. Dinamica di 102 dB, IF con SSB slope-tune e regolazione da 600Hz a 2400Hz per il CW, notch sulla IF. Kenwood TS-940S Amateur Transceiver. 33 for 24 months with PayPal Credit * Condition: Used Used. Auto tuner, RF speech processor, I bought a used TS-940, on the Ham Radio Deluxe Beta 3. If I turn the xvcr off and back in problem is not there. Manuals; Brands; Display and Key Functions. I am still using the far smaller and simpler to use TS-50 that had originally listed for 1/2 the price of the 940 and get consistent praise for its audio. They work great. Built-in 24 hour digital clock with timer All-in-one type construction containing all components from AC power supply to speaker UAL: I am trying to fix a TS-440S VCO1 problem when is not possible to run on frequencies above 14. Procedure: Set the Dial frequency for approximately 1. inconvenience only — no da- 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. After removing the top and bottom case covers, you prop the front of the radio up 1 to 1 1/2 inches. But stopping, the "dots" displayed and PLL not locking. 2—75. Total Tranceiver Repair: - Power Supply failures serval times. Shop by category Kenwood TS-940S MAIN Display Unit X 41-160-M/13 in Excellent shape. dk: Advertising : Main Menu: Login : ts-940: ts-950: ts-990: ts-2000: ts-2400: ts-b2000: tw-4000: Hello! I have a 20 million serial# TS-940S (Mint!). Requests: 1. softmark (3692) 100% positive; Seller's other items Seller's other items; Contact seller; US $2,000. (Liquid Crystal Display) sub-display uses a dot matrix (5 x 7 dots) module of a maximum of 16 digits and 2 lines of data. Tnx as always. Updated 12-2018 TS-930S/TS-940S Meter LED Upgrade Kit Version 2 Instructions The TS-940S Power supply upgrade kit was designed to replace the original. I sent my TS-940 with the dreaded dots issue, as well as several other concerns, to Dave Lyndon (https://www. Dave Phillips. I have to wait an hour a half to 2 hrs before About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright (1) The LCD display is not showing ANY information. Kept in a smoke and pet free working ham shack. Kenwood TS-940S (TS 940 S TS940S) Erratic display Kenwood TS-940S (TS 940 S TS940S) RX AUDIO Kenwood TS-940S (TS 940 S TS940S) Amtor switching time To use low gain transistors, or to use high gain transistors (different dot Adjustment shown on page 91 of the Service Manual (available in the Files area last time I looked): Step 3, VCO5 should be 5. The TS-940S was happily not an exception to the rule; there were a lot of sites returned when I did some basic searches using "Google" (i. 0V +/- 0. I need now to print off all the above ideas and start some measurements. The purpose of this document is to help HAMs determine whether or not his/her TS-930S/940S RF power amp is in working condition, and if tests indicate that it is not, to provide some guidance with how to find the problem and repair it. Readjustment of the PLL unit will correct this tendency. The TS-940 update is even simpler, I don't think you will encounter any problems, just follow Jeff's video. The CAR Unit also has a pair of PLL"s that can drive the Unlock signal, which is sent to the Control Unit But, It is essential to determine which PLL's are unlocked, any one of which will produce the dreaded "Dots" on the display. 2V To see the lock status of VCO5, probe pin 2 of IC18 on the PLL board. My solution: to swap the 940 with a friend even dollars for a TS-50 he had new in the box. Pre-Owned. In built-in, and with its new whisper-quiet cooling system, the TS-940S is a complete, all-in-one type transceiver that brings tomorrow's sophistication to today's serious enthusiast. Kit comes with 2 Superbright LED's, limiting resistors, and a full set of color instructions with pictures to help you get it done. If any of the function buttons are pressed, a frequency is displayed,1/2 sec,then return to dots. The glue was fully removed from board and some components were replaced, as The TS-2000(X)/ TS-B2000 transceiver has many function controls. I bought two pair of HUAGAO drivers for my PA's. Marker. It has some issues and I have found these groups are a great resource-- I currently have a TS 940S . com) last year. The one on the Aux Display only retains the date-time clock on that display. com This unit functions as designed – smooth operational main VFO tuning – the sub-display is bright and clear, as is the digital frequency display (see pics). I have a used pair of red dot Motorola’s and their Beta tests at 23 and 25. If it's not happening on all bands this link might help. Third-order products are Model TS-940S NOTES: 1. When you turn on unit frequency comes up then goes blank with dots at bottom Lost receive /transmit none of the controls work such as ATT/AGC/Meter functions /basically every knob on left side . This problem has been a bane to TS-940 users for a long time. 6. 05 MHz in 10 Hz steps, in accordance with the TS-940S operating frequency of 150 kHz to Possible cure for TS440 showing dots only on display The most common reason for the the display to show only dots, is that one of the phase locked loops is not locked. If the timer switch is set to ON, @ Sub-display consists of a 2-line, 16 digit liquid crystal dot matrix. Group C Keys. Opens in a new window or tab. 8 MHz (inside The symptom you have is the classic PLL Unlock, and should be represented by the frequency display showing only dots, but will briefly display the frequency if you turn the main There are actully 6 PLL's in the TS-940, and any one of them can cause the UNLOCK condition that renders the frequency display as a row of dots. It was caused by several broken solder joints on the bottom side of the PLL board. Fast & Free shipping on many items! Kenwood TS-940S MAIN Display Unit X 41-160-M/13 in Excellent shape. The TS-940 LCD Display Superbright LED upgrade turns that dim old LED module on the front of your 940 to a bright beautiful Cool Blue display. I have a 940 thats been a great radio for me. 9 posts • Page 1 of 1. shows again even when rotating the dial. Following the TS‑900, the TS‑930, TS‑940, and TS‑950 were launched. Cut the trace as shown in the pic. Size . However, the most First, you should first determine if the "Dots" appear only within one of three band segments. 6MHz Kenwood TS-940S (TS 940 S TS940S) service manual and specs Kenwood TS-950S (TS 950 S TS950S) I have read with interest your, and many other, articles on the Kenwood 440 display problem, but I have been unable to see a problem similar to mine and wonder if you have an opinion. pa. Clean the copper for the resistor to solder to it. This group is for both, and I mistakenly described the TS-930 wiring. To prevent parts from working loose, Kenwood used this clear "goop" to hold them in place. I regret not buying more before they sold out. 4 dB (a Model TS-940S NOTES: 1. Flag this item Kenwood Marine Radio TS-940S user manual. i had to let the 940 go, and that was tough, Every once in a while when I power it on I do get the DOT display, turn it off and back on and its normal. This forum message list include all message for Kenwood TS-940S "DISPLAY FLASHING"These radio are notorious for display issues and solder joint failure. 2. It is possible to save yourself a few dollars and lose nothing in quality by buying the parts to upgrade your Kenwood radio for Sub Display Battery . He said it was one of the best Ham Radios he has owned. Specification/Remarks 40. Custom preview. My TS440S,at power on, displays a frequency for about 500msec,. Keyboard Frequency entry, large fluorescent display and LCD Sub-display. Accordatore automatico, processore vocale RF, VOX. 2x 63 volt 2200uF replaces the Kenwood 2200uF 50 volt with voltage safety margin and one 2200uF at 35 volts cap. 1. Jim is correct, look at the DC-DC converter first. Diagram. Share. Recently when i first turn the radio on i have the dots in the display, all bands freq readout when vfo dial is turned then dots when stop. Find many great new & used options and get the best deals for Kenwood TS-940S Ham HF Radio Transceiver ( FOR PARTS ) at the best online prices at eBay! Free shipping for many products! Kenwood TS-940S Ham Radio Transceiver Pdf User Manuals. Built-in 24 hour digital clock with timer All-in-one type construction containing all components from AC power supply to speaker UAL: NOTE: If disregarded. However it always foes away and the radio works fine after 45-60 seconds. Having just experienced PLL unlock & drop-out of TX + failure of the sub display (PLL loss will do this), I opened up this 7mil s/n radio I inherited fm my Stepdad Scott There are two batteries in the TS-940. Also for: Tr-9000, Ts-700a, Ts-140s, Ts680s. 5x5 Dots à by dustBUST. However, more than 20 years have now passed since the TS‑950SDX was launched. dk: About mods. com. momentarily displays then disappears. Used. Unlike its hybrid predecessors, the Kenwood TS-940S is an all solid state HF transceiver with an optional A typical TS-940S transceiver will actually output 150 watts or more in CW mode, but CW power output should be held to no more than 110 Watts. When I rotate the LCD Contrast adjustment clockwise the display starts showing a hash of lines, but no readable info. ). The original Kenwood Digital Unit simply blanked the frequency display when an unlock condition was detected in the PLL, the PIEXX Unit enhanced this by telling you exactly what was happening. Ever since I had the radio (4 years ago), the LCD display fades in and out. Now find diode 130 and cut it Click here to write a new message or comment for TS-440 Note that the message is not related to any article. Power Control and at Unit. Kenwood TS-940S 160-10 meters 120 VAC. -- 73's Dave KB7JS Failure is an option, but it If you own a Kenwood TS-440 (or know someone that does), odds are you are familiar with the "dots on display". Built-in 24 hour digital clock with timer All-in-one type construction containing all components from AC power supply to speaker UAL: View and Download Kenwood TS-940S instruction manual online. See pic I attached. There is a section titled "Possible cure for TS440 showing dots only on display". Graphic Display. The internet is a great source of information for trouble shooting many older radios, transceivers, and boat anchors of all types. Dot problem on TS 940 marcstuart I have the dreaded dot problem which comes and goes. Then all is good no issues. The unit may After months and months of looking and compairing specs, I finally settled on a 940S/AT. TS-940S improvements, modifications, problems, circuits, etc. Sub-Display Function. Possible cure for TS440 showing dots only on display: The most common reason for the the display to show only dots, is that one of the phase locked loops is not locked. The digital display started going from normal to "dots" and back again. There’s a very nice write-up about this, applicable to at least the TS-930 and TS-940: Dual displays Main display is a large, two color -fluorescent dis- play. Add the 1K resistor across In the TS-940, if you have a PLL Problem, the main frequency display will be rendered in a row of Dots instead of numbers, indicating one or more of the PLLs are unable to control their oscillator and have entered an Unlocked state. They performed identically to the OEM drivers, and I didn't have to change any settings, even AM output regulator See the circuit description on page 12 of the TS-940S Service been performed on the Power Supply upgrade kit in both TS-930 and TS-940 radios, and the cumulative results show that the receiver is actually quieter with which woudl render the receive mute and set the Frequency Display to a line of Dots. VS-1 was used in many other Kenwood sets over the years the year including the TS-440 / TS-940 / TS-711 / TS-811 and TW-4000 transceivers. $83. Please click the button to reload the page. e. 08 WIP. / TS-940 repair it yourself. When the TS-440 was made, it could be used mobile. Chapter 6 Satellite Kenwood TS-940S. inconvenience only — no da- I got a TS-940S in Serial # 603XXXX series that has the "dot" problem. Update. esc to dismiss. After the IC has been changed reset the main microprocessor by pressing and holding the A=B key, and then turning the power switch OFF and then back ON. Clock works When I press mode it switches freq shows but goes out again All push button functions work and freq EMBED (for wordpress. ,then goes to steady dots. In the past I have owned some of the mid to top rigs, including a 1000MP, TS-870, TS-850, TS-570D, TS-430 (still us as back-up), TS-180S and FT-920. Features The display is now stable no matter how it is pivoted. Kenwood TS-940S (TS 940 S TS940S) Erratic display: Intermittent control or display problems that are difficult to correct with the reset procedure may be caused by a faulty ROM socket. 500MHz the rig works OK ) . Could you advise me what to do? Skie Kenwood TS-940S SPECIFICATIONS. HF Transceivers. The 5x5 Dots. All Messages By This Member #1927 and LCD dot-matrix 16-digit sub-display. What happens when you have either VFO A or VFO B selected and the Dots display, then use RIT and Main encoders? View and Download Kenwood TS-940S service manual online. If I tapped/slapped the top of the transceiver or tap the PLL board, it would also cause the rig to jump off freq. The problem is that as this goop ages, it becomes brown and conductive, and that's not good! Subject: Re: [kw-ts940s] TS 940 problem Joe I may want to buy that hulk if you don't find a better alternative. Dynamic range of 102 dB, SSB slope tune, 600Hz to 2400Hz CW variable bandwidth, IF notch. First seen on DaFont: October 13, 2005. That's the classic symptom of the dreaded TS-440S pll unlock. Verified purchase: No. KENWOOD TS 940S HELP ITS NOT WORKING. Using the keypad entry, tune the radio to 9. ttf. or Best Offer +$6. DCK-2 option allows operation from a 13. 2k to 2. 1 lb), with AT-940: Other features: Dual Get the best deals for Kenwood TS 940s Parts at eBay. An item that has been used previously. These Instructions are TS-440 specific, but the basics also apply to the TS-940, TS-811 and TS-711. There are six PLL's in the TS-940, four are located on the PLL Unit, the other two are located on the CAR unit, which is tucked into a closed frame on the back of the Digital "B" Unit. VFO-B , the number, and the analog scale. Please check our Used List. Group a Keys. The item may have some TS-940S. 00 shipping Possible cure for TS440 showing dots only on display The most common reason for the the display to show only dots, is that one of the phase locked loops is not locked. When I press the bandswitch buttons, the freq. Cheers Dave--73s Hi all I have a Kenwood TS-940s when I power it on I get nothing on the display and no sound good to it, I have checked the power with a multimeter in different locations to see if there is power So I am getting Power There is a glass fuse in the middle of the radio and that's working fine Is there another fuse that would power up the front panel. 25. KENWOOD TS-940S HF Transceiver, Kenwood MC-43S mic and power chord. Low signal (near 0V) says it is un-locked. 4999, and 30. Of all of these rigs, I really think I VFO display have started to flicker. Also, I tried purchasing one of the 28V Older topic. 22. One morning he turned it on and it was just dead. The USB and LSB carrier If the display (TS-440) Possible cure for TS440 showing dots only on display English language (TS-440) Undocumented feature English language (TS-440) Serial interface English language (TS-940) TS-940S LCD Clock Display Erratic Operation English language (TS-940) TS-940S SSB Talk Power Improvement English language new dot-matrix LCD sub-display for showing graphic characteristics and messages, all serve to provide maximum flexibility and ease of operation. org item <description> tags) Want more? Advanced embedding details, examples, and help! Favorite. io Notification #2490 The following files have been updated in the Files area of the kw-ts940s@groups. com If the TS-940S frequency display shows only dots and Search help: Support (FAQ) How to donate: Help mods. Ashtec Legend Posts: 9156 he was useing the radio on fm for a bout 30min then the frequency digits out and a tone come on theres no tx or rx no dots on the display you can not do eney think with it. Download . I was gifted an older Kenwood TS-940S by an Elmer. It's not an uncommon problem for the old 440 to have. /KB7JS TS-940 Alignment Procedures - Version 6. ber cejp ljfsm lqyx btxut eefdhsw kbw lhj tlg fndi