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  1. 73's de Edd

    i need to find those variable capacitor

    OH ! . . . . . het is in mijn thuisland. . . . https://www.benl.ebay.be/sch/i.html?_odkw=air+variable+capacitors&_osacat=0&_from=R40&_trksid=m570.l1313&_nkw=Ham+Radio++variable+capacitors&_sacat=0 Remove HALF of the plates from one gang and it will reduce to around 70pF - near enough for your...
  2. 73's de Edd

    Carnival Game Control Board

    That board looks straight out of 1970 and hopefully, will be using "cutting edge" TTL in it. Plus it has a pooched radial electrolytic, failing by oozing its guts, just as you used to see them.
  3. 73's de Edd

    Sony STR-DE305 Stereo Receiver/ Amp unit - no display nor output

    Sir Chas . . . . . Let's just do an initial static testing of the output drives of the 15 pin IC701 . . .with its pin # 1 referencing being at the clipped corner of the unit. BUT . . . we might as well do the voltage tests at the bases of the power output transistors, for ease of access.. It...
  4. 73's de Edd

    AOC 2236Vw lamp hookups

    Look at this and see if it helps you find your way out of the forest . . . . . . . . Pin 1 of connector CN801 to Pin 1 of connector CN802 receives the HV drive to the CCL tube while the pin 2's are current sampled to ground and feedback is sent to the controller IC. 73's de Edd .....
  5. 73's de Edd

    Sony hcd991AV.transformer

    Both are 1/4 watt carbon film 0.15 ohm fusible resistors. BUT YOU MUST FIND WHAT IS BAD ON THE BLUE AND PINK LINES . . . that is overloading and causing them to burn up. Or . . . . . as Ferdinand Marcos used to say . . . . .when Ismelda was having a bad shoe day . . . . KAILANGAN MO HINDI ANO...
  6. 73's de Edd

    Sony hcd991AV.transformer

    Sr Michael villasana . . . . . We can't read yours . . . . . maybe . . . . you can read ours . . . even using one eye. Feed back to us if any fuses (BLUE) were blown open or are now bad . . .and hopefully you have not replaced and tried out and made a Five dollar repair change into 50...
  7. 73's de Edd

    Strange symbols in Cct. Diags.

    Much akin to . . . I cnduo't bvleiee taht I culod aulaclty uesdtannrd waht I was rdnaieg. Unisg the icndeblire pweor of the hmuan mnid, aocdcrnig to rseecrah at Cmabrigde Uinervtisy, it dseno't mttaer in waht oderr the leters in a wrod are, the olny irpoamtnt tihng is taht the frsit and lsat...
  8. 73's de Edd

    Digital piano won't power ON

    Sir Alektron . . . . . HEY ! . . . . where did you get the new cartoons ? . . .Disney . . .or Looney Toons ? Give me a link to their stored site / access. So I can be using the proper assigned numerical designations, when referring to a part in the future. To date . . . . I had only...
  9. 73's de Edd

    Motorola Transistor Replacement

    Sir Kepo . . . . . Forgot to ask later, after having initially noticed. But possibly you had to mechanically / physically tear down a bit to get down to the single naked board state. Perchance is there a rectangular, insulative mounting mica spacer on each transistor and an inner thick...
  10. 73's de Edd

    Sony STR-DE305 Stereo Receiver/ Amp unit - no display nor output

    Sir Chas . . . . . Your post # 21's photo reveals a slow blow fuse that BLEW both VERY-FAST and VERY-HARD. It not having had time to blow s l o w l y when your +51vdc and -51VDC . . . for a combined and summed series 102VDC . . . .were suddenly shorted out by the POWER transistor...
  11. 73's de Edd

    Digital piano won't power ON

    Sir Alektron . . . . . Scanning 25 pages of schematics . . .all condensed down to this now most relevant info . . . It's marked up so that I can relate down to the most minute circuitry action if so required. INITIALLY though, it looks like we have confirmed the +VCC voltage making it from...
  12. 73's de Edd

    Need help to identify a component!

    Sir deeredoctor . . . . . Definitely a thermal inrush, current limiting thermistor that you have there . . .BUT in a very small power handling profile . . . just looking like its starting its decline, from the very first time powered up and starting a timely decline to result in a failure in a...
  13. 73's de Edd

    Switch Identification

    Sir Stephen Hall . . . . . DON"T GUESS ! . . .let me tell you . . . its being a Push-on Push- off switch from a PFAFF models 1221, 1222, 1222E & 1222SE #70-112000-02. sewing machines work light. With repeated use, its mechanical latching works may have failed within the switch housing ...
  14. 73's de Edd

    Comedy Thread

    Re . . . post #161 Doing supplemental "Goggling" . . .with all my might . . . . best as I could come up with, was . .F.E. being " Flat Earthers " and their implied need of our planets side profile shadow /umbra being cast upon another celestial body.
  15. 73's de Edd

    Digital piano won't power ON

    SIr Alektron . . . . . Lots of parts have different numbering assignments, comparing schematic and actual board but . . . . . the +5VDC Dee Switch Mode power supply section ground zero is being within your RED OVAL of photo #39069. ( Being content, within your post # 41 . ) You have a...
  16. 73's de Edd

    Please Help in circuit repair

    Sir Bhaven . . . . . i found one faulty part which was TVR 07511 I suspicion that part to not be faulty. I don't see your varistor in any of the photos, but the green round unit is definitely a surge thermistor, used at power turn on. What is the state of your pigtail fuse which is...
  17. 73's de Edd

    Strange symbols in Cct. Diags.

    Sir Michael @ Studio1 . . . . . The component in question is a SM Capacitor (C799) just under the red DA=5V. rail and on the [ADINR] rail. What does this particular symbol signify? There seem to be lines between the two parallel lines which signify a Capacitor. The reason I ask is having to...
  18. 73's de Edd

    Electric weed eater motor output question

    Sir Duanee30 . . . . Looks like you can use the old drill holder block with some heavy duty cable ties , around it and the handle. Additionally, with some blocks and spacers mounted to the plywood to hold the motor proper up to the proper height. Model number included . . . for tieing into...
  19. 73's de Edd

    Home alarm speaker wiring

    Sir P4ul . . . . . " the guy took down . . . an . . . . . alarm speaker " If that is indicative of a plurality, and more than one speaker, can't you just look at another unit and see how it is hooked up, to get its relative color coded connective wires ? 73's de Edd .....
  20. 73's de Edd

    Denon AVR-1912 E2/EA

    SIr Michael @ Studio1 . . . . . I researched your cables marked on ID # for its associative UL and RU member codes and it seems both Pioneer and Denon use this ribbon cable source. ONLY . . .¥ 0.72 . . . . .BABYCAKES ! . . . . .if they deal in onesies- twosies . . . LINK REFERENCING . . ...
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