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  1. 73's de Edd

    Power supply dead. Pictures inside... repairable?

    . Sir dmul . . . . . . . Those two connections, being of particular interest, are the primary of the SMPS power transformer, and if in flow soldering manufacture, were not FULLY solder wetted, progressive high current intensity at those junctions could have created a progressive...
  2. 73's de Edd

    sunbeam electric blanket no heat

    This small circuitry is wired in between the two halves of the heater wiring of your blanket for temp sensing and it sends back a corrective signal to the main SCR based controller unit. I now can make out the R1? of the first of 2 resistors, being side by side , then there is a Pee-in- Pee...
  3. 73's de Edd

    Power supply dead. Pictures inside... repairable?

    . Sir dmul . . . . Too wide of a pad for this boards dedicated diode layout protocol. Under all of the smoky carbonization I am reading that as R31 which is a 0.5 ohm SM resistor. I think that a nearby connectivity related transient problem resulted in a power semi blow up that then...
  4. 73's de Edd

    Foot Switch help

    . Sir Hornnumb2 . . . . . It probably will be as is shown here with the high probability of the center pin being equipment ground and then you differentiate beteeen the color codes of the right and left switches. One switch set will be Yellow Orange while the other will be Red Brown...
  5. 73's de Edd

    Use for old circuit boards

    control horns YEAH . . . . .some of which can get on up into the 122 db ear piercing noise thresholds . . . .are used to ward off nearby aircraft . Or you might also see a control horn . . . . such as are used on scale models. Initially, I guess that he just wanted to strip all of the...
  6. 73's de Edd

    sunbeam electric blanket no heat

    Ohhhhhhh . . . Esteemed grand . . . great potato . . .and Revered Pooh Bah extraordinaire . . . . We SURE could have used its model number . But any chance that it is being this series and its controller might look like this ?. also It has to have the 3 prong plug making GOOD and FIRMLY...
  7. 73's de Edd

    Marshall MA100C problem

    Sir Blackwellefty . . . . . . THAT was being the bottleneck . . . . and now we're on a roll . . . . and you are doing GREAT! You have to realize that at my end I am TOTALLY . . . blind, deaf and dumb . . . heavy on the dumb . . ., nor can I smell , feel, touch nor thoroughly physically...
  8. 73's de Edd

    Bypass motor on motor help

    . Sir bline22 . . . . Now . . . with your provided model info I was getting an initial referencing knowledge base of 268 hits and then subdividing those on down and weeding to ~127...
  9. 73's de Edd

    Sony Trinitron XBR blinking screen

    But . . .But . . .but . . . you forgot the model number to be able to lead you . . .as you probably dont even know what a G2 is or how much you have to feed them every day.
  10. 73's de Edd

    Bypass motor on motor help

    . Sir bline22 . . . . . " Congranulations " on your having found the round, black activator " maggit " for the magnetic reed switch. At least, give us the brand name of the unit to search with. In the interim, I just went to getting an all encompassing patent drawing. On this unit, its...
  11. 73's de Edd

    Trying to identify and locate component or suitable replacement

    There are several . . . Normally Unused . . . components on the board and one at the top right corner that cannot be made out. There is an option of using the combined bifilar choke or individual chokes on both legs of the power supply feed lines. Also there's an option of using an extra...
  12. 73's de Edd

    Sony Trinitron XBR blinking screen

    MODEL YEAR PLEASE. if 10 yrs or more, Ill bet on a a gassy picture tube, Pulls too much current and an IC detects and tries to correct but overbiases and it blinks. BAAAAAAD picture tube. Confirmation . . . .drop down conrast / picture adjustent as well as a little brightness and see if it...
  13. 73's de Edd

    Transistors... help

    . Sir Ian Schmidt . . . . . Looks like two very good transistors with VF junction voltages of 498 mv and 485 mv on one set of junctions of one transistor and VF junction voltages of 498 mv and 483 mv on the set of junctions of the other transistor. Very closely matched . . . . .just like...
  14. 73's de Edd

    Bypass motor on motor help

    . Sir bline22 . . . . . Looking at your #39 posts picture and the VERY long shaft that is facing us, There is definitely one flat on that shaft and possibly another at 90 degrees to that one. I suspicion that the unit not reassembling-alignig up and moving on down to close is due to that shaft...
  15. 73's de Edd

    DC motor Speed Control with high current and potentiometer

    Sir Stefanus Adrian . . . . Having built my own constructions for going on 75 years now and my MASSIVE accumulation is such that I would already have all parts . BUT the aspect of design, board layout and final construction and then any de bugging . . . . . and then seeing that something like...
  16. 73's de Edd

    Old expired '83 brain needs rework

    How can I tell if the TCI I have is solidstate or not? Well thats going to be a given, with it definitely using transistors and possibly using an IC or two in processing the signal from the sensors to trigger the IGBFETS that drive the spark coils. Using that testing technique, every thing...
  17. 73's de Edd

    Lcd computer monitor repair

    Sir Mr.fix it_101 . . . . . Looks like X2 gen is nothing but a stinking marketeer . . .while TATUNG is being the REAL ESTEEMED GRAND POOH BAH and involved party. The unit seems to be using a 48 watt 12+ volt external BRICK for deriving its initial raw DC power. I now give you the inboard...
  18. 73's de Edd

    Question about scopes

    https://www.electronicspoint.com/posts/1713900/
  19. 73's de Edd

    Lightsaber Mod!

    Sir billyf2l . . . Indeed . . . . . all of the timing and functions are within, and inaccessible for alteration, under and within the units BLACK epoxy blob . . .Circuit On Board. Of the three functions, I am sure that the first is a wanted function and the second is where the REAL playtime is...
  20. 73's de Edd

    CMOS 4001 Repeating Timer

    Try much much lower values of C1 to initially get the operational speed faster, to visually confirm that the circuit is actually working. Seems like that required capacitance is / will be having excessive leakage,as to even think of that loooooong of a timing interval. Then . . . . I also...
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