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  1. 73's de Edd

    Switching PSU drops 5v.

    Sir Simon_m74 . . . . . Looking at your second schematic supplied. With it using design waaaay back when no IC's were need to make a switch mode power supply ! Long live the discretes. If being power supply related . . . . . Look at the derived supply that is being one section up from the...
  2. 73's de Edd

    Hi everyone

    https://en.wikipedia.org/wiki/Tim_Tam#/media/File:Tim_Tams.jpg Make my drink choice . . . .MILK.
  3. 73's de Edd

    Garmin GPS overheating problem

    Sir Les Unwin . . . . . .. . . . One fine looking unit ! I believe I've tracked it down to a capacitor (ceramic, 16V,470, 105 degrees C). That high of a capacitance, of 470 ufd and specific temp rating would be indicative of an electrolytic type of cap, and not a ceramic. Do you have...
  4. 73's de Edd

    Trans former rewind

    Sir tooter . . . . . . . . WOW ! and that's being vewy-vewy heavy on the WOW! aspect That's a piece of cake . . . after all of the LAYER constructed units that I have either LABORIOUSLY torn down in order to modifiy or built from the "ground" up. THAT'S being a split bobbin ! You just check...
  5. 73's de Edd

    Regency air band scanner schematic

    Sir wb8yxi_Ski . . . . . Obviously THIS reference above, is not being your unit, with it using a quadrature FM detector. Give me some crystals values that you have installed in the unit, so that I can compare against only 1 other Regency TMR8 family series of schematics, that I have access to...
  6. 73's de Edd

    Kenwood Integrated Amplifier KA-3700 Fuse pops

    Sir BigDaddySmokeAlot . . . . . Using a DVM in its diode test function, then backed up with performing a low ohms test and checking out the 4 bead diodes that are towards the end, on past your blown fuses, will probably reveal one or more being dead shorted. OR any of the 4 large black...
  7. 73's de Edd

    Squawk Box

    Sooooooooooo the dome is not as sophisticated as I described it. Plus the motor shaft passes thru the central board hole, for its shaft o engage into the dome . The rotary rings ARE there to transfer rotary Led connectivity to the dome. The BLACK plastic " slippers" appeared just like...
  8. 73's de Edd

    Help Identifying blown component

    Sir Mark Bollack . . . . . Looks like you need to supply the whole schematic for getting any better initial analysis.. FROM . . . only that which I am able to see . . .seems Like the main power generated from the main SMPS is originating at the left side of inductor L4 as raw DC and then...
  9. 73's de Edd

    FVFM High Voltage rectifier

    Sir Raygers, . . . . IThe 2CL77 is being twice the diode that the old one was . . .plus I additionally like the supplemental isolative case / housings length. The whole unts circuitry design should already have a very high resistor / or string at the HV output. You just need to check the...
  10. 73's de Edd

    Yamaha CR 840 - IG 02940 IC

    Sir Phil Owens . . . . I think that your odds of having both bad at the same time is RARE ! More suspect is the power supply section. What are your capabilities,experience and skills, plus a basic DVM to use to analyze with? 73's de Edd .....
  11. 73's de Edd

    Squawk Box

    Sir bigkim100 . . . . . . aka . . .The " KIMSTER" Your more incoming info. . . . . means the capability to then analyze it more fully and give you even more related analytical feedback. I have seen one of your missing transmitter units, with its lil' piano wire whip antenna . Look at the...
  12. 73's de Edd

    Broken Y terminal on furnace circuit board

    Sir Allen Wiggins . . . . . A repair technician informed me that it is $ 650 to change out. OH-MI-GAWD That either is being a full blown " maternally copulating " rip off . . . . "artiste" Or . . . . . he jist plane don't evin knoes durt. First thing I would be doing would be to take...
  13. 73's de Edd

    Squawk Box

    No that is merely the fact that I showed the GREEN speaker wire as being two connections, one, being where the speaker connects to a pad at the side of the PCB and then its traveling over to the secondary of the output transformer via a foil path. The second speaker BLACK wire G1 connection is...
  14. 73's de Edd

    Squawk Box

    Sir bigkim100 . . . . . BEHOLD . . . submitted herewith . . .a full replotting and resubmission of your board photos, after anointing with Holy water and annotating with resplendently cryptic markings. If this device is being chonoligically dated to R2-D2, it would have to be of post...
  15. 73's de Edd

    Sherwood AM 7040

    Sir dire . . . . . That was being my final option, to be suggested, if the earlier "freebie" options didn't pan out. Here is what is being inside of a unit . . . . . http://freemansgarage.com/blog/?p=760 I do know that THIS guy, moi, has some old modems dating back to the days of 150 /...
  16. 73's de Edd

    Need Help regarding Yamaha RXV371. No Sound Output

    OK let's take one quantum jump ahead by seeing that there is being CB3, (Reference page 83) connector, at the main amplifier cable run from the power transformer secondary. We want to unplug that connector to see if disconnecting that MAIN raw power to the AUDIO amplifiers will result in the...
  17. 73's de Edd

    Philips dfr-9000 Blowing fuse

    SIR Naitsirk . . . . . Referring to the manual info just supplied to you, look at the pic on 4-1 below.. Take note of the large WHITE rectangular 1901 relay and also the WHITE HDPE 1001, two pin male connector over to its right. Unplug that connection that comes to it, which goes to the...
  18. 73's de Edd

    Repair car remote key HELP

    Sir Ahsenpk . . . . . I, for one, certainly couldn't make it fly again. Looks like there was a vertically mounted mini WHITE ceramic SMD fuse, being at the very top of the charred mass. BUT looks like your problem / fault was being prior to reaching it, and being of very LOW resistance to do...
  19. 73's de Edd

    Need Help regarding Yamaha RXV371. No Sound Output

    Sir Hemant Choudhary . . . . . Oh-tay y y y y y . . . in now starting with YOUR unit of the two YAMAHAULER units at hand. Here, you have both power supply sections . . . . .which I have now unitized upon one close up page. The top SBY PS is being continually on . . . 48 hours a day ...
  20. 73's de Edd

    Squawk Box

    Sir bigkim100 . . . . I hurriedly read right past that initial '70's . Seems like a minimum of two transistors would be needed for just the audio amplifier . . . . but the whole system might be based upon a + feedback loop to make the unit into a power oscillator, then the different switched...
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