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  1. 73's de Edd

    Identifying diode

    Put your meter in diode test and take a reading and swap leads and take another reading to see if its reading as a diode. Also test the unit as being a resistor . . . .but that 47 reading would be backwards . . . and 74 is not a normal sequence / value. I also have seen tubular ceramic...
  2. 73's de Edd

    Denon AVR-1912 E2/EA

    Sir Michael . . . . . Consult my post #23 for referencing and you will see that from its origin at the CP13 connector pin 7 and then its routing thru the boards that I have highlighted in PINK, that the +8VDC supply line branches out / duplicates and uses redundant dual connections into /...
  3. 73's de Edd

    Motorola Transistor Replacement

    Sir Kepo . . . . . Looks like I mispositioned a 2K resistor to the left side of the 1K resistor , with that paired cable also hiding another resistor that would then be to the left of the 2K resistor. Also what terminal or parts node does the end of the obscured YELLOW wire tie into, if...
  4. 73's de Edd

    Denon AVR-1912 E2/EA

    Sir Michael . . . . . SUPPLY ROUTES RELATED WITH +8VDC SUPPLY. . . . . . 73's de Edd
  5. 73's de Edd

    Denon AVR-1912 E2/EA

    Sir Michael . . . . . O.K. here I have the two power supplies initial prep work, with its added annotations of your initially mentioned areas of testing. You say . . . . Regarding the REG_CNT (p.110), there are five Full Wave Rectifier Ccts. on this pcb which is attached by Edge Connectors...
  6. 73's de Edd

    Motorola Transistor Replacement

    Sir Kepo . . . . . All of the clues are there . . . . FR varnished board circa . . . a . .la . . . . .1976-1977 It is being a Motorola brand and they OWN that very specific casing profile MJE802 . . . . . NPN Motorola darlington Fill us in on what the numbers are on the two small signal...
  7. 73's de Edd

    Component Identification

    " a vintage GE alarm clock " . . .doesn't cut it . . . need its G.E.model number. That equates with as much interpretable info as . . . .a vintage FORD car . . . . Ditto on the need to just completely replace the lamp if . . . . .the light was flickering . . . during the last gasp of it's...
  8. 73's de Edd

    Auto Dialler user guide

    Why for . . .you no expose back . . . .to see if a model or manuf I.D. is printed back there ?
  9. 73's de Edd

    PSU advice

    Make sure that the transformer is not compromised with a shorted turn. This reference is warning of a potential pitfall that might be encountered in the physical mounting of one of these big heavy brutes. One might be attempted to use a pair of small gauge U bolts and their associative flat...
  10. 73's de Edd

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

    Sir Chas . . . . Indeed . . . I do now see that I had posted info relevant to another persons equipment . . . . here is your units specific info, below : The most suspect failure condition would seem to be a Collector to Emitter short being present on one or more of the Q703 and 704 and...
  11. 73's de Edd

    Denon AVR-1912 E2/EA

    Sir Michael Studio1 . . . . . Just confirming that I have the right manual, are both your manuals page 42 and the Adobe page being 42 and that page content being relevant to the main power supply and the side of the cabinets, small SMPS that is mounted vertically in the unit, just to the...
  12. 73's de Edd

    Ideas to start my project.

    After reading the demands and seeing absolutely mostly "do ables", but then seeing the : Tire pressure Air and oxygen content in the car while parked. I would be wanting to check out his electronics knowledge and credentials to see, if in fact, he is PRIMARILY an athletics instructor and drew...
  13. 73's de Edd

    elastomeric Zebra connectors

    Was that repair where there was initially a foldover graphite particle ribbon cable that he totally pulled and then "poked" wiggled and eventually fanagled a Zebra strip between the vacuum electro deposited 100 um layer of strip contacts on the display panel and the PCB propers, gold flashed...
  14. 73's de Edd

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

    Sir Chas . . . . Suspects . . . . . . . . are being marked in bottom left corner area with fine RED lined rectangles and BLACK stars . . .will fill you later if the pins of the IC902 are not silk screened on the board. SPECIAL PHANTOM BOARD LAYOUT INFO . . . . . 73's de Edd
  15. 73's de Edd

    Need help finding replacement transformer for oven control board

    Sir BoS . . . . . So you actually did not need to see the placement and wire codes of the push on connectors to the board ? But are trying to work on the board itself ? We never did have the EXACT power transformer specs . . .just guesstimating. But as our Honorable and Esteemed . . . Blaine...
  16. 73's de Edd

    Digital piano won't power ON

    Sir Alektron . . . . Isn't it great to have so ma a a a ny choices . . . now, just take yer' pick. ( HINT . . . . use same-same- or the 2nd-3rd or 14th down wire leaded radial units )...
  17. 73's de Edd

    Digital piano won't power ON

    Sir Alektron . . . . . GREAT SHADES of the very-very last of the late 1980's . . . . . . here we are having some state of the art digital design. Battery came off leaving one leg behind. DRATS ! I've even got some MORE bad news . F.I.O. . . . . . for all you battery hounds . . . in...
  18. 73's de Edd

    May i know what kind of components is it?

    Sir Wilson2308 . . . . . From the photo of the inside of this even HIGHER UPSCALE BRYMEN * meter. (* The actual manufacturer of your TECHGEAR re-branded meter). It just seems like this resistor is being a current shunt on the 10 amp function or its next lowest current function. PICTO -...
  19. 73's de Edd

    May i know what kind of components is it?

    Sir Wilson2308 . . . . . Seeing the hard grey ceramikote conformal coating and a sloping spiral hump underneath it.I lean towards it being a wirewound resistor. That being , instead of its other alternative of it being a metal film resistor. A STRONG neobdmium magnet placed at its mid point...
  20. 73's de Edd

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

    Sir Chas . . . . . Initial Question? OK, so you have the complete manual downloaded from Libmanuals site and all of the 50 pages of just its schematics. Our point of interest will be ~ its Page 201. Did you only get a HTML version with its limitations of having to use that portable...
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