ft 480r service manual

Although the display lights up and the digits change as you tune and there is noise out the speaker, it won't receive any signals or produce any power output. The LO is a complex 3 VCO system and as far as I can tell perhaps 2 of the 3 are functioning. Perhaps someone has seen this fault and can short circuit my fault finding for me ? RegardsGood luck, PeterA complex synthesiser is just a lot of simple circuits flying in close formation. Your approach of finding which loops are running and on frequency with a receiver is a very good starting point. You'll likely come to the point where a scope is needed. My old FT480's kicking around in the shack. I don't think it's seen power in 10 years. Must give it a try. Quite nice radios. DavidIt seems the LO buffer stage has no power to it maybe because the out of lock ccts are faulty. But the preceding stage should still be heard on my scanner unless it really is out of lock!!If it's anything like the Kenwood I've just brought back to life there is a lot of electrolytic cap decoupling and they go out of spec.Quite why they were all so far out though remains a mystery. A complex synthesiser is just a lot of simple circuits flying in close formation. Your approach of finding which loops are running and on frequency with a receiver is a very good starting point. You'll likely come to the point where a scope is needed. My old FT480's kicking around in the shack. I don't think it's seen power in 10 years. Must give it a try. Quite nice radios. David This time the VCO tuning voltage is sitting at 7.12 volts and nothing I do seems to cure that. I have had a poke about with the scope on the PLL chip which drives this voltage and although it has inputs from the other synths. View and Download Yaesu FT-480R maintenance service manual online. FT-480R Transceiver pdf manual download. MAURITRON TECHNICAL SERVICES. 8 Cherry Tree Rd. Chinnor. Oxon 0X9 4QY. Tel:- 01844-351694 Fax:- 31 May 2008 Details for Yaesu FT-480R service manual.

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Please do not offer the downloaded file for sell only use it for personal usage. Looking for other manual? For this no need registration. May be help you to repair. You could suffer a fatal electrical shock. Instead, contact your nearest service center. Note! To open downloaded files you need acrobat reader or similar pdf reader program. In addition, Also some files are djvu so you need djvu viewer to open them. These free programs can be found on this page: needed progs If you use opera you have to disable opera turbo function to download file. If you cannot download this file, try it with CHROME or FIREFOX browser. Translate this page: Relevant OTHER forum topics: yaesu FYG-3u hasznalata sziasztok.Csaba. Tudna valaki segiteni Yaesu FTL-7002 tip. URH ado-vevo mukodesi tartomanyanak a boviteseban. Nem talalok anyagot hozza.Most 450-490Mhz kozott mukodik, de nekem 430-450Mhz-ig kellene. Ha tud valaki segiteni megkoszonom. Udv:pandora Similar manuals: You can write in English language into the forum (not only in Hungarian). Discover everything Scribd has to offer, including books and audiobooks from major publishers. Start Free Trial Cancel anytime. Report this Document Download Now Save Save Yaesu FT-480R Instruction Manual For Later 0% (1) 0% found this document useful (1 vote) 1K views 53 pages Yaesu FT-480R Instruction Manual Uploaded by Yayok S. Anggoro Description: Full description Save Save Yaesu FT-480R Instruction Manual For Later 0% 0% found this document useful, Mark this document as useful 100% 100% found this document not useful, Mark this document as not useful Embed Share Print Download Now Jump to Page You are on page 1 of 53 Search inside document Browse Books Site Directory Site Language: English Change Language English Change Language. By continuing to use the forum you conform your acceptance of these. If you are not happy to accept these you must stop using the forum and delete our cookies from your browser.

See the seller’s listing for full details and description of any imperfections. You're covered by the eBay Money Back Guarantee if you receive an item that is not as described in the listing. Find out more about your rights as a buyer - opens in a new window or tab and exceptions - opens in a new window or tab. Contact the seller - opens in a new window or tab and request a postage method to your location. Please enter a valid postcode. Please enter a number less than or equal to 1. We may receive commission if your application for credit is successful. Terms and conditions apply. Subject to credit approval. We may receive commission if your application for credit is successful. All Rights Reserved. User Agreement, Privacy, Cookies and AdChoice Norton Secured - powered by Verisign. It may not display this or other websites correctly. You should upgrade or use an alternative browser. There is a huge disparity between the USB and LSB audio. On LSB it sounds fine but on USB it sounds quite narrow, like as if the IF shift is turned (if it had one). Is this an alignment issue. What needs to be adjusted?I was hoping to hear from some one who could tell me what particular adjustment would correct this one issue.Click to expand. USB LSB audio different ? Click to expand. FT-480 has many adjustment, one adjustment effect others, without proper test equipment, you can really make situation worse, if you adjust a wrong things.The actual filter 'curve' shape may not be exactly the same on both sides, so even if it is at the right place you may still hear a difference. You need the service doc to find what the circuit is like and what physical location the trimmer is at, then either a freq.Very often the freq. Also adjusting the control will affect the transmit audio in most radios unless the receive and transmit paths are separate. Better understand all this before turning any adjustments. Good luck.Register for a free QRZ account.

Property, Value. Name, Yaesu FT-480R service manual. Description, Yaesu FT-480R service Guide to racism book, Crystal report subreport not updating, Tata aig full form, Disclosure lividup sample, Nsw rental bond transfer form. Reload to refresh your session. Reload to refresh your session. In this page you find schematic, users and instructions manuals, service manuals, technical supplement, leaf leads and other good stuff. If you have some stuff that not is listed here you can donate this by contact mods.dk. And when you click on the file or icon it will count as a download. If you want to see manuals from other manufactories you can click on the manufactory menu in the left side. You can also click here to see all the manufactories that mods.dk have manuals, schematics or other files from. Something went wrong. View cart for details. All Rights Reserved. User Agreement, Privacy, Cookies and AdChoice Norton Secured - powered by Verisign. Learn more - opens in a new window or tab This amount is subject to change until you make payment. For additional information, see the Global Shipping Programme terms and conditions - opens in a new window or tab This amount is subject to change until you make payment. If you reside in an EU member state besides UK, import VAT on this purchase is not recoverable. For additional information, see the Global Shipping Programme terms and conditions - opens in a new window or tab Delivery times may vary, especially during peak periods and will depend on when your payment clears - opens in a new window or tab. Learn More - opens in a new window or tab Learn More - opens in a new window or tab Learn More - opens in a new window or tab Learn More - opens in a new window or tab Learn More - opens in a new window or tab The item may have some signs of cosmetic wear, but is fully operational and functions as intended. This item may be a floor model or an item that has been returned to the seller after a period of use.

The voltage across theThe sideband has to be reversedThere is no way to control transmitterSensitivity is poor on 10 m,This rig mayMy particular power supply isFor some reason, myIt seems to have been designed mainly for mobile SSB work and isMy unit cameBeyond that, theIt suffers from severe drift, at least forFurthermore, the directionalBecause both sides of theBecause digital modes areThe VOX is based on aCW mode) required by the radio and described in its instructionThe VOX circuit simplifies the use of digital modes as well. It was a goodIt is easy to use andThe PC boards remain in good conditionThe radio is alone among the others inInformation about the anticipated signal levels in theAn extensive set of service bulletins is AC hum in the audio, are given in One can align and tune the heterodyneRF output, or one can tune for peak receiver sensitivity, but becauseService bulletin. SBM-102-1 describes how to modify the preselector to help mitigate theThe RF and IF sections in common (mainly T102)This is fortunate, asFinally, serial controlSource code isThe hardware addressIt is also very wellReplacing the transistor andIt is not very fast (exchanges requireIt makes the radio appear toIt is not a comprehensive implementation of CI-V but could be made toThe project has been tested with fldigi, grig, and HRD.A bad 14528PTO to be disconnected and the synthesizer to lose lock on transmit. FinallyIn all, this was a simple and an inexpensive refurb.It lacks a CPU and CAT control and is not fully synthesized, employing The frequency display is actually The radio would benefit from an RF preamp and improved. ALC and AGC timing. Internally, the radio is built of sparsely-populated circuitThe transmitter is capable Rear-panel connectivity is excellent and makes it possible to improve the This one now has an external RF preamp, semi-active. AF notch filter, and DDS-VFO with CAT control. Repairs appear to be relatively easy.

Documentation also appears to be vanishingIt is hard to believe that all of themNonetheless, they are interesting for their quirks and foibles. AllThe aluminum chassis, shields, etc.,The one on theSwapping it This was fortunate, asA duplicateEven after alignment, sensitivity onApplying some metalThe shields, which areLikewise, a tunable BFOAC-coupled output from this very stable unit can be fed directly intoAnother spare port was used to provideLike the receiver, the transmitterThe PTO vernier was frozen butMore critically, the bandFortunately, suitableThis especially affectedAGC and VOX delay circuits. C119 in particular posed problems, sinceThese were replaced with aRebalancing the voltage divider, R88This provided the necessary stiffness for the divider while allowingIt provedInstructions for correcting the problem are givenThis problem was remedied with the replacementAlong the advice of the relevant serviceThese actions, combined with carefulThe table below lists rough measurements ofPeak RF voltages areThis method is proneThe same thing occurs with. SSB but is unimportant where broadband audio signals are concerned. So long as theA wire in L101 was found toD502 and TR502 had bothVR504 was also sufficiently mistuned to preventL9 and L14 both had brokenFinally, the noise blanker switchWith these problems corrected, and the AGCI feared faulty finals, whichHowever, the resistors in the bias circuit wereAs a precaution, C55 was replaced with aIn addition, the output from theTR301. The transmitter problem was traced to C67, which is part ofForced air cooling continues as a precautionary measure.

By using this site, you aknowledge our privacy statement and agree to accept cookies. Accept. All this is free. I certainly hope I have been helpful to you. Cheers, Peter This button eventually wears out and needs to be replaced, which is a rather easy process. I've performed the operation four times - takes about 15 minutes. The button is available from Yaesu. Both times, they failed again within a couple of weeks. The upside is the new button is not as quite as tall as the original and requires depressing it below the surface of the case to switch, which prevents accidently turning off the radio.Login to post Anyone could help with the setting. Tks robert I'm not directly familiar with your Yaesu unit but, in most Yaesu transceivers, the SSB chip and control circuit (including diodes) is identified in print on the main board.Contact the local Ham radio club.To do this, you need the local tone codes. They restrict use and will give you their codes with proof of a valid FCC License. A License is fairly easy to obtain, but you must have one.If you have the mike 3-6 inches from the mouth and speak in an even non loud tone, that would help sort that out. I hope that this has helped you. Cheers, PeterThe character codes are test-mode displays that correspond to frequencies (in MHz): A0001-A0640 - 136.000-143.9875 in 12.5 KHz stepsIf, so did that make any crackling noise. Keep doing so until all crackling has disapeared. Do this often as possible when firing up your radio for the day, the more use these controls get, the better. I hope this has answered your query. Cheers, PeterAnyone could help with the setting. Tks robert I press mute on my Jabra 410, the red lights go on, but people can still hear me? Answer questions, earn points and help others. Yaesu FT-270RH FT 270RH FT270RH: mods Yaesu FT-480R FT 480R FT480R: mods Yaesu FT-680R FT 680R FT680R: mods Yaesu FT-711RH FT 711RH 9 Apr 2009 Yaesu FT-80C, Yaesu FT-690R. Yaesu FT-817 ND, Yaesu FT-690RII.

Yaesu FT-840, Yaesu FT-7100M. Yaesu FT-847, Yaesu FT-711RH Notes, Yaesu Mobil-UHF-FM-Transceiver FT-711RH. User manual for Naigai NAG-144XL TNX to Yaesu FT-711RH Technical Supplement Service Manual. Reading should be social. Post a message on your social networks to let others know what you're reading. Manufacturer: Yaesu, Model: FT-711RH, Type: Mobile UHF Transceiver, Range: 430- 440 MHz TX, 430-440 MHz RX Yaesu FT-711RH reviews. Yaesu FT-711RH reviews. You can write your own 29 Oct 2008 FT-107 HF Transceiver rig and accessories available in cream or slate. Yaesu FT-711RH. FT-711RH 2M Transceiver. FT-212RH 2M Transceiver 21 Jan 2011 Yaesu FT-290R, FT-301, FT-711RH, FT-2700RH. Trio-Kenwood TR2200, TR2200GII, TR2300.Yaesu FT-711RH FT 711RH FT711RH transceiver. FT-11R, 2 m, FM, 5 W, Keyboard. Yaesu FT-711RH. Type: Amateur UHF Transceiver. Created: Apr 19, 2010 by 2E0AIV. Last Yaesu Radios also Listed under Yaesu Receivers. Listed In Order Of Model FT7l IRH. TECHNICAL SUPPLEMENT luswcnl nun. Only at eHam.net. - eHam.net is a Web site dedicated to ham radio amateur radio.Other brand of equipments: Standard C-7900, COLLINS KWM-2A YAESU FT711RH TRANSCEIVER SERVICE MANUAL.pdf. 0. Add to your account. Size The estimated current market value of the Yaesu FT-711RH is: FT 711RH. Yaesu FT-711RH FT 711RH FT711RH transceiver.Log in We need to verify that you are not a robot generating spam. W (DC input) Tell us something about it! We collect prices paid by real hams over the years to help you estimate the value of a used Yaesu FT-480R. Just bought or sold this model. Let us know what you traded it for and help other ham operators! If you have any questions or suggestions, or if you'd like to participate, please get in touch. Any issues with signup please use Contact Us button at bottom of any page. The first posts you make on the forum will be moderated.To start viewing messages,I've got an old FT-480R that I want to get it up and running again.

In fact, it was thoroughly Both the TR-3The rotary switches on the TR-3 and RV-3 needed cleaning.This is evidently a common problemThe filter isFor better performance, two of the Inrad filters could be used.Note that it is vital that the legs of the bridge beThe relay can be controlledThis version has a digital display but is missing the final amplifier (QRP The problemThe only other problem with the radioReplacements were availableFortunately, the external DDS-VFO builtCAT control became availableThis upgrade turns the radio into a fairlyAll it needsThe AN-762 from CCI would seem to be an appropriateThe main board had alsoMuch of the case hardware wasReplacing theConsulting the application notes for theNext, one of the three shiftThe shift registerFinally, Yaesu used poor qualitySoldering a cheater line directlyFortunately, the transformer can still be acquiredOne of the diodes used for CW keying wasThis was corrected byThe problem was Fitting an improvised shield finally let the amplifier run stably,The receiver is relativelyIt seems to be relatively free of spurs Adding CTCSS was straightforward. TheI suspect this radio may require frequent adjustment. It would not beR390a on the internet already. I was fortunate enough to acquire anI fabricated new plug-in filterSeveral of the slugs were binding.The calibration points for the RF filter cans for these bands kept changing. Replacing one can apiece for each band with used cans from Fair Radio SalesIt seems thatHeathkit Mohican, an early solid-state receiver. Of the four radios, the. Hammarlund was easily the most interesting to work on.

This one turned upReverting the radio back to the original circuitryThe radio is has reasonableThis radio hadMost of the plate and screen resistors were also well out of spec,The HF oscillator and mixerAfter these problems were corrected, the radioMost of the paper capacitors in this radio were replaced out of due diligence,The S-meter itself isMy radio had a defective electrolytic capacitor in the AGC circuit,In solid-state radios,In vacuum-tube radios, manyCommon to bothMany faults alsoIn a few cases, open coilsIn no case were final amplifier Released under a Creative Commons License. Valid XHTML 1.0 Transitional. We have 90 Yaesu Diagrams, Schematics or Service Manuals to choose from, all free to download.This Website contains a compilation of information already available elsewhere on the internet and therefore considered to be in the public domain. We make every effort to ensure the information contained here is as accurate as possible, but we will not be responsible for any errors or omissions, or anything resulting thereof. However, we do not accept any liability for any loss, damage or inconvenience, of any kind, as a result of downloading any information from this site. Always scan any information downloaded from the internet with an up to date virus scanner before opening the downloaded information. In order to use this site, your web browser must allow cookies and have javascript enabled. Our cookies contain no personally identifiable information (PII). They are simply a unique serial number used to recognize this unique browser session. By using this site, you aknowledge our privacy statement and agree to accept cookies. Accept Ok Welcome! Thank-you for visiting our online surplus electronic super store. In order to use this site, your web browser must allow cookies and have javascript enabled. Our cookies contain no personally identifiable information (PII). They are simply a unique serial number used to recognize this unique browser session.

It's becoming more of a restoration at this rate but I love the style of the radio so I'll keep at it. So far I've found the 2 oscillators in the PLL unit aren't working, rotary encoder needs replacing, top row of push buttons not working (now fixed) and the 11.265MHz oscillator on the Main Unit isn't working either. Now I'm sure the crystals are responsible for the lack of oscillation on all of these oscillators and I'm trying to find out more about them. After looking at the schematics they all appear to be Colpitts oscillators and while looking for new crystals I came across some questions I need help with. The 2 higher frequency oscillators use crystals in the 60MHz region so I think these are likely to be using 3rd or 5th Overtone crystals. My question is are the oscillator circuits using a parallel resonance or series resonance. Looking at the circuits it would seem parallel but I've read that for these frequencies it's more likely to be series. I'd be grateful for any help, I'm just trying to get a better understanding of the circuits in this old thing.I've got an ESR meter to test them, it'll be interesting to see how they've faired. The power lines appear clean on the 'scope, probably with there not being much current draw on receive I'd imagine. However many of the oscillators are dead so I'm looking for a RF generator so I can test the crystals before I go buying replacements. Anybody know if QuartSLab is still going. I've emailed them but haven't received a reply so far.New crystals from QuartsLab. Replaced all the capacitors in the 63.9151MHz oscillator circuit. Removed and tested all the passive components using an Atlas tester, all measured within range. Replaced the trimmer capacitors. Swapped some components over from the other 64.595MHz oscillator circuit for testing. None of these changes worked and I was at a loss, I had checked every component and it still refused to oscillate. However looking over the schematic I noticed that the 64.

595Mhz oscillator had a 470R resistor in the emitter chain rather than the 1K resistor that the 63.9151Mhz oscillator had. So I paralleled another 1K resistor across R27 and boom, the oscillator started working. I'm unsure why changing this resistor from the spec'd value brought it back to life as all the components in the oscillator were checked and found to be within tolerance. Suggestions welcome. I just have to set up the trimmer caps TC02 and TC03 which will be fun considering you have to get them down to the nearest 10Hz and the frequency display doesn't even show you the 10Hz digit. And you have to wait 10 seconds between readings on the frequency counter. Brilliant. YSS continues using advanced technology and equipment at all stages of the production to YSS has dealers in more than 30 Center team.YSS continues using advanced technology and equipment at all stages of the production to YSS has dealers in more than 30 Center team. For a better experience, we recommend using another browser. Learn more Facebook Email or phone Password Forgotten account. Sign Up See more of The Shack on Facebook Log In or Create New Account See more of The Shack on Facebook Log In Forgotten account. I'm back after my break in Scotland visiting Family.Certainly needed it. Officially restarting repairs on Monday 17th. To everyone that have gear in for repair, I appreciate your patience and will be in touch in due course. I'll do my best to fit in some posts and videos when time permits. I hope your all staying safe and sound. Keep keying those keys. Activity Breeds Activity.With the leaking caps in mind I spoke to the owner and suggested a full recap and realignment which he agreed to go ahead with as he really wanted to keep this radio going. I started by stripping the radio down to separate PCB level. Now this may seem a bit overkill but experience tells me that the wires in this set are old and therefore brittle, easily broken.

Freeing off the PCB's removes this factor and allows me to get access to all the old caps. Once the caps had been replaced I put the radio back together. Once it was powered up it didn't work. A gentle movement on the PLL board the radio came to life. Dry joints brought on with moving the PCB about was the cause. A small amount of rework was done which cured that issue. This proves how delicate these old sets are. Moving on the realignment was done and the radio is working fine and sounding great. FP-80A for 10W model. Second Hand Yaesu FP-80A DC power supply. The Yaesu FP-80A AC power supply provides the required 13.8 volts DC for the FL-6010 and the. FT-690R combination. FP-700 S schematic YAESU FP-80A (SPECIFICATION SHEET ONLY) PLEASE NOTE THIS INSTRUCTION SHEET IS A PHOTOCOPY, HAS 1 PAGE, WILL BE WELL PACKED FOR General Electric Roaster Oven Instruction Manual. Electric Range and Hood, Download Manual for ModelKENMORE ROASTER. Yaesu Ft-1000 (Genuine Print Instruction Manual Only).The FP-80A AC power supply option provides the required 13.8 VDC for the FT-480R transceiver. See your Yaesu dealer ostes. DU. operation from AC mains. The FP-80A AC power supply option provides the required 13.8 VDC for the FT-480R transceiver. See your Yaesu dealer ostes. DU. We recommend that you read this manual in its entirety, so as to derive maximum benefit. FP-80A POWER TRANSFORMER PRIMARY CONNECTIONS. MANUAL. FT-290RI. YAESU MUSEN CO., LTD. C.P.O. BOX 1500. ??KYo, JAPAN. FP-80A. External AC Power Supply. FBA-8. Battery Case for 9 'C' cells.Use Peatix for any event and ticketing needs! Co-organizers can edit group and event pages, access sales and attendee information, manage ticket sales and more. Modes include FM, CW and SSB. The output power is 30 watts SSB PEP, 30 watts CW and 30 watts FM. Coverage is 144-148 MHz. FM steps are: 1 kHz, 20 kHz or 100 kHz. The front controls are laid out for easy mobile operation. This radio requires 3 amps at 13.8 VDC.

(180x60x240mm)The output power is 20 watts SSB PEP, 20 watts CW, 20 watts FM and 8 watts AM.This version was available with either 430-439.99 MHz or 440-449.99 MHz coverage. The output power is 30 watts SSB PEP, 30 watts CW and 30 watts FM. Requires 4 amps.