ft-757gx service manual

my 757 gx has lost receive on ssb I think I've narrowed the problemdown to it being can be made with 1N4148 Diodes, using the diagram ofthe FT-1 Mixer. Yaesu FT-757GX Service Manual to repair the HF AllMode Computer Aided Transceiver. While we believe this technical information is correct and factual, Yaesuassumes no liability for damage ERRATA FOR THE FT-757GX OPERATING MANUAL. Service manual (4 MB). IC-E92D User manual (15.7 MB) Servicemanual (8.3 MB) Yaesu FT-757GX User manual (3.1 MB). FT-767GX User manual. MFJ-451 Morse Keyboard Controller (CLICK formanual) Two (1988) Yaesu FT-767gxii Top row L-R: Collins HF-380transceiver, Yaesu FT-757 transceiver yaesu md 100 microphoneschematic wire diagram with pin out. This resource is Yaesu FT-757GXII Mic Wiring - Microphone wiring for Yaesu FT-757 GX II. I connected my Yaesu FT-757GX to a 12V 35A power supplybackwards without If you have the schematic of the transceiver, theyshould be located at the plus. Nice and clean FT-757GX but does nothave any transmit or receive. For parts or repair. 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 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 Contact the seller - opens in a new window or tab and request post to your location. Please enter a valid postcode. Please enter a number less than or equal to 1.

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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 FTL7002 UHF ado-vevo Sziasztok! 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 yaesu FYG-3u hasznalata sziasztok.CsabaYou can write in English language into the forum (not only in Hungarian). Home Documents Yaesu Ft 757gx Schematics - FT. Yaesu Ft 757gx Schematics. Yaesu FT-757GX Service Manual - Premium Card Stock Covers 28 LB Paper. Yaesu FT-757GX FT757GX Operating Manual prev next out of 3 Post on 26-May-2018 254 views Category: Documents 5 download Report Download Facebook Twitter E-Mail LinkedIn Pinterest Embed Size (px)It has a voltage. RESTAURATIE EN MODIFICATIE VAN YAESU FT-757GX EN FC-757AT T23, T24 en T25 opnieuw af teregelen zoals dat in de manual voorgeschreven.Up for sale is my backup HF rig, a really nice Yaesu FT-757GX. You'll also receive copies ofthe user manual AND service manuals, plus copies of any other. What can be done if you need aspare part but the radio is end of service. I don't evenknow if the radio works yet. It will be greatmotivation to get my General.

Combined with a coupled AGC, a weak or distorted station can be understood by the proper operation of these organs. With many types of interference above a certain interference level, the adjustable noise blanker works well without affecting the modulation of the receiving station. With a drop of oil as a renewed lubrication it turns out to be undesirable. A widely-heard complaint is that the receiver is too noisy. Indeed, this is true if the preamplifier is on, it is only necessary if you are mobile and with a short vertical antenna. As a test, disconnect the antenna and turn the volume control to the maximum. Too much noise? No because you will hear nearly nothing. Turn the volume control back to its usual position, reconnect the antenna and listen to the 10m band. The noise increases. The receiver's own noise is thus lower than the band noise and then the receiver without a preamplifier is sensitive enough! This restored transceiver remains stable and does not drift to me. The later FT-757GXII has a built in RF speech processor. The most suited point was the transmit portion of the RF UNIT e.g. buffer amplifier Q40 (2SK120) directly in front of the crystal filter. It turns out that drain's output was sufficient for a reasonably effective clip level, but even better when damping resistor R184 was removed. Here, it was done by cutting the ’top’ leg of R184. Damping still occurs when the diodes begin to limit. Moreover, almost no one notice that a clipper is active, it can remain permanently. The PROC button could be used for something else. Installation on the track side, but if you have a steady hand, it can quickly on the component side. My method was solder between the lower end of resistor R185, and at the top of the cut leg of resistor R184. I expect photos and drawings are clear enough for easy assembly. Overdriving the output stages is almost impossible, but with too much microphone gain your modulation will sound rough.

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. 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. I need the information for a complete transmit alignment. ThanksAbout two thirds down the page.Register for a free QRZ account. Discover everything Scribd has to offer, including books and audiobooks from major publishers. Start Free Trial Cancel anytime.Browse Books Site Directory Site Language: English Change Language English Change Language. 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-757GX Manual For Later 100% (12) 100% found this document useful (12 votes) 25K views 38 pages Yaesu FT-757GX Manual Uploaded by Andy Description: Yaesu Handbook FT-757GX Full description Save Save Yaesu FT-757GX Manual For Later 100% 100% found this document useful, Mark this document as useful 0% 0% 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 38 Search inside document Browse Books Site Directory Site Language: English Change Language English Change Language. Often, one does not know about the correct use of RF gain. When listening to a station, the amplification is reversed so that it is still understandable and if it sounds too soft, it adjusts with volume control. This reduces the strength of all unwanted signals below or above the desired station.In addition, there are controls that are often lacking in more expensive radios such as the above-mentioned RF gain, SHIFT, WIDTH, and NB.

That's the reason why such an amplifier can blow up during an endless FM QSO or with an unusual high SWR of the antenna system. For a long life, it is recommended to fix the output to 100W. During the restoration it has occurred several times that the 100W set was unintentionally set to transmit without any load and, thanks to SWR protection, the final stage has always survived! As an extra measure, I first brush a touch of special contact oil or contact grease with a brush. My experience is that future contact problems are largely avoided. The measurement can be made easier by using test point TP2001. It must be 8216,600 kHz. Also the order of steps H and I must be changed in contrast to the manual. So first step I. BFO Frequency and then step H. Carrier Point must be performed! If you cannot tune the aged crystals to their nominal frequency, turn the SHIFT knob in LSB mode to get the right frequency, leave the knob there and trim the corresponding trimmers for USB and CW mode. The same can also help if you start the procedure with USB mode instead of LSB. If that does not help to get the oscillators at the correct frequencies, then USB and CW adjust slightly with VR2007 and repeat steps I and H. By turning the knob, you will find the balance point. In this position, the button must be removed and replaced again, but now with the dash in the 12-hour position. That can be corrected by carefully turning the trimmer TC2006. For this, a sprayer is used. For this purpose, solid brass solder cable clips were used. To make place, first the remaining material was grinded away and then the cable lips where glued to the cooling block with two-component glue. After that, the machine has been used for 10 years daily, with the repair being maintained. Since then, the glue has been applied to me by virtually any common practice. It was found that at the first one SWR measurement was wrong, and the plates of both variable capacitors showed burned spots due to spark surge.

Besides T20 it is better to readjust all TX IF transformers T20, T21, T23, T24 and T25 as described in the manual. It's a piece of cake and there is no need for special measuring equipment Slide the switch into the position as shown in the photo. The stuff has been unused for years in my junk box. In addition, many wires were cut through. Boards with their components looked a bit messy, but were found to be in good condition after cleaning. Normally, I do not do anything with devices in such a state and will only store them for spare parts. The 3 Volt cell is soldered on the LOCAL UNIT with two lips, but to get to the track side, the entire print must be dismounted. It could be ordered. You know how that goes; Wait a week, then drive to the mall by car, go to a payment garage and walk to the shop. On the Internet it turned out to be faster. Pay with Paypal, no postage and well packed in the bus the next day. I do not have a special connection with the supplier, but if you want to know: batterijenhuis.nl. In one of the demolition sets I saw that a previous owner had replaced the lamp. It met, so I left it. It turned out that that type of radio was also protected by a lamp. It was shown in the circuit diagram that I had in my archive by chance. With to a temporary bridge connection instead of the lamp, he could still take part in the amateur traffic with the set. PNP transistor Q03 (2SA733AQ) was replaced by a BC557 on the DISPLAY unit. Using a BC557 proved to be a good replacement. Attention: The pinout is different from the original transistor! To achieve this, the RF UNIT resistor R179 (10k) must be cut between Q38 and Q39. It is true that for each band and mode the setting for a particular transmit power is NOT equal. Note that if you are using different transmission powers. The final stage can deliver more than 100 W, and especially in the CB world, one tends to squeeze out more power.

Try pressing F then 0 and if that don't work try battery removal and if you still get nothing time to call Yeasu they have always had firmware issues with handhelds I have a triband handheld that did the same thingAlso verify proper battery voltage, it will typically transmit with low voltage.On tx frequency blanks out and icon upper left indicates tx-off.These days, it could be as simple as a poorly soldered connection. I don't recommend that you try repairing this yourself as there are essentially no user serviceable parts in radios these days. Radio repairs these days have come down to board swapping because the parts are so tiny that humans have a hard time replacing (and in some cases, seeing) the parts. Yaesu US has a very good reputation for quality repairs so I'd suggest you send it there. They will likely just swap a board out, but that will be less expensive than having someone spending 10 hours trying to find the problem and repairing it. I know, as I work in a radio shop, and if it isn't something real simple, all we can do is do a board swap.Make sure that the power supply has enough capacity to run the radio, at least 20A. Make sure that the power supply is putting out 13.6V. If you were unfortunate enough to hook the power leads up backwards, then a trace may be blown off the circuit board internal to the radio. Also, it is likely that the reverse polarity diode inside has shorted out. This may cause the fuse to blow when you apply power. If it has blown, it likely took the the trace out inside the radio. If the power supply and fuses are OK, unless you are competent technically, the only recourse is to take the radio into a shop and get them to fix it. If you were upgrading the firmware inside the radio when it happened, then the radio is likely non-repairable. I don't recommend ever upgrading a radio's firmware. If it isn't broken, then don't fix it!!The Problem? You need one that will provide at least 15 amps at full output.

Try setting your radio to a lower power setting and see what happens. You may find that you have to upgrade your power supply.Schematics and manuals can be found at www.mods.dk.Could you please explain it better?It has stopped receiving on 2 local repeaters but it transmits. PL tones are ok, I've reprogrammed several times with no change. Other repeaters work fine. Any thoughts? These sometimes get damaged due to lightning strikes nearby or hi SWR levels. That would be my first guess.Make sure that your positive and negative leads from the radio go directly to the cars battery. This will help prevent this problem.If it un-keys, then the problem is in the microphone. If it is internal to the radio, take it to a competent technician. If the problem goes away when the mic is unplugged, then get a new microphone.Make more effort to post a question that makes sense.Mine is a Yaesu ftm-400dr On the Yaesu FTM-400XDR to turn off the beep after someone transmist you want to go to the setup screen. Then Press Digital button. Then set option 4 Standby Beep to Off.How to fix it. Here is a manual link: Yaesu VX 7R Operating Manual Reset Procedures Microprocessor Resetting Set. Answer questions, earn points and help others. Operating Manual PDF Service Manual for Yaesu FT-1802 (FT 1802 FT1802): Mods for Yaesu FT-1802 (FT 1802 FT1802): Yaesu FT-1802 (FT 1802 FT1802) Extended Transmit Modification Yaesu FT-1802 (FT 1802 FT1802) technical specifications:ARTS, DTMF, CTCSS, DCS WIRES II. CW trainer. Password protection. Something went wrong. View cart for details. All Rights Reserved. User Agreement, Privacy, Cookies and AdChoice Norton Secured - powered by Verisign. Click here to Download. Click here to Download. Click here to Download. Click here to Download. Click here to Download. Click here to Download. Click here to Download. Click here to Download. Click here to Download. Click here to Download. Click here to Download. Click here to Download. Click here to Download.

Both cabinets were thoroughly rusted on the outside. From the two devices a well-functioning unit was assembled and the cabinet was derusted and sprayed with black hammer finish paint. In many cases, with a 2nd hand FC-757AT the cable is missing. Frequently asked questions are also asked on forums. Fortunately, after long searching, I found out, that Italian guy I5XWW makes all kinds of cables on request or has them already in stock for well-known amateur devices. In my place of residence, the original type with soldering flaps is not available, but a more common and larger CR-123 photo battery. To shorten the pins as little as possible, a Dremel was slipped through the button cell connections. The remaining upright lips are then suitable for connecting the photo battery with two extension wires. There is room under the CPU UNIT and with two cable ties it can be firmly attached to a vertical stud. ORIGINAL, GENUINE, OEM Technical supplement, service and maintenance manual. Some manuals are bound, some have wire thru the holes to hold together, those would have been in a multi-manual binder. Friends don't let friends buy copies or scanned on CD garbage. If you have ever tried to work with a schematic or board layout on a computer screen, you KNOW why you want a genuine original paper printed manual.Super high amount of views. 1 sold, 1 available. More Super high amount of views. 1 sold, 1 available. You are the light of the world. 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.

Learn more - opens in a new window or tab Read item description or contact seller for postage options. 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 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 See the seller's listing for full details. 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 9. 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. Some specific purchases aren't covered by eBay Money Back Guarantee Learn more eBay Money Back Guarantee disclaimer - opens in a new window or tab. All Rights Reserved. User Agreement, Privacy, Cookies and AdChoice Norton Secured - powered by Verisign. I have one, but it's been a few years since powering on.Is your firmware up to date Yaesu FT2000 The FT2000 with those changes seems another class of radio.Not even static Instruction book is not all that helpful. It is a common enough relay if you want to replace it. Also, pull each PCB card and clean the contacts with a pencil eraser. Pink erasers are OK but the white ones are better as they aren't as abrasive. Hope this helps, VE3CMQI was programming it when the display went blank. It turns on and I can hear the tones but the display shows nothing. Do a full reset first of all, that's the best step with any hand held radio problems.

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