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  1. 73's de Edd

    Loewe TV Chassis Q2500 Startup Failure

    Sir David . . . . . After I saw you mentioning the presence of the UB supply . . . .albeit a bit higher than is usually expected . . . .typically being 110- ---130 VDC, as has been encountered on different sets. But we don't know how much that value is being loaded down to . . . . with a...
  2. 73's de Edd

    Digital piano won't power ON

    Sir Alektron . . . . . Au contraire . . . . . .messr . . . . it's just that there is lots of conflicting info on those two unit schematics and the amassing and amending of that info. With my using your two best board shots of max relevance, and the amended schema . . . . we now continue...
  3. 73's de Edd

    Rewiring Garage Door Opener

    Sir ApexDestroyer . . . . . Your # 22 . . . . one noteworthy and thorough response ! Kudos . . . First . . . the response of the phone answerer-er-er at either OHD / Genie . . .whoever THE actual Sugar Daddy is being NOW . . . in not using their usual stock answer for such queries, and...
  4. 73's de Edd

    Thrustmaster T300 PCB component ID help

    Sir apptech . . . . . It's just being a transient absorber / protector, which I don't expect to be "loading down" and pulling your 5VDC down to nuttin'. The most revealing test would be to just lift it out of circuit and then test for your 5V. . . .which I still certainly feel . . . . ...
  5. 73's de Edd

    Thrustmaster T300 PCB component ID help

    Sir apptech . . . . . Well initially it was of Philips manufacture, then changed to NXP then to Nexperia . . .wonder what next week will bring ?. Looks like you might have yourself : https://www.mouser.com/ds/2/302/PESDXL1BA_SER-1151633.pdf Alternative sources are being from Littelfuse...
  6. 73's de Edd

    Tv repair

    Your STK403-070 . . . ALSO . . . . ties into the protection circuit by diodes AD16 and AD17, just as your AD18 and AD 15 were sampling for your your STK403-100.
  7. 73's de Edd

    Chinese Hiland 0-30V/Audioguru PSU build (down the rabbit hole)

    I was just using your page one schematic, where a 3055 was used as driver. So . . . . . .measure the DC voltage across the emitter resistors to see how well balanced the voltages are. Or if no voltage is on one of them, your whole load might be carried by the hot one with the cold one being...
  8. 73's de Edd

    Chinese Hiland 0-30V/Audioguru PSU build (down the rabbit hole)

    Sir bushmeister . . . .et . . . .Uncle Donald . . . . . ? ? ? ? or is that Scrooge ? ? ? ? ? my childhood and G-G Grandchildren are too far away. Q2 is a driver for the load sharing Q4 and Q6 pair, so it might be the warm one, of the 3 . . .'3055's.. Back on your Li ions references, you were...
  9. 73's de Edd

    Adding line in to AN7465S Multiplexor

    Sir clipper . . . . . So the purpose here was to permit you using two RCA plugs into the system so that you can input music into the car radios audio and speaker system from your Iphone. And as you have figured it out so far, if there is no tape in the unit, the tape post amp preamp LA6458 is...
  10. 73's de Edd

    Is it possible to fix old PC monitor

    Sir pharaon . . . UNISYS techno info ain't easily / readily available . . .especially when they source it out of Korea, from the back door of Hyundai. REFERENCING: Your very first photo, with the dominating large BLACK canned main filter capacitor for the AC line supply, being just left of...
  11. 73's de Edd

    Rewiring Garage Door Opener

    Sir ApexDestroyer . . . . . Re: GENIE Model IS550/A OBSERVATIONS . . . A "Smart House" would already have this feature being inherent. Sounds / seems like to me that you are randomly / piecemeal, cobbling together an ersatz "Smart House". Looking at the info on the Genie beam rail of this...
  12. 73's de Edd

    4P3T rotary selector switch for guitar

    Sir Scentral . . . . . Yep . . . . . this would then become your altered wiring layout . . . . . 73's de Edd .....
  13. 73's de Edd

    Kodak 850H Slide Projector Problem

    Sir Doug Dunlap . . . . . No problemo . . . .here you have it . . . . . .and your / its situation is probably being covered after page 18. (The full download version, does not have the Blue MANUALS LIB logo obscuring the graphics. )...
  14. 73's de Edd

    Kodak 850H Slide Projector Problem

    Sir Doug Dunlap . . . . . INFO is just below . . .what is YOUR units specific problem ? TECHNO REFERENCING . . . . . 73's de Edd .....
  15. 73's de Edd

    4P3T rotary selector switch for guitar

    Sir Scentral . . . . . YOU GOT IT ! . . . . . . in the words of Roy Orbison . . . Just confirm the Pick-up switching sequence that you were experiencing on the old unit. Also, its not being so clear in the photo . . . . . of that area which I highlighted in PINK. It seems that the other...
  16. 73's de Edd

    Reparing a PM2434 Philips microvoltmeter

    SAME . . . . SAME . . . https://www.utsource.net/itm/p/677721.html?utm_source=bing&utm_medium=cpc&utm_campaign=20160414-2&utm_term=BSV81&utm_content=BSV81 The pricing and availability aspects seem to be in order. But use the CHAT feature of that given website to get a final quote on priced...
  17. 73's de Edd

    Loewe TV Chassis Q2500 Startup Failure

    Sir DavetheBari . . . . . ( Whut's a Bari? ) I am finding Q2500 pages 1-3 as being full schematics in my documentation . . . To see if our documents are agreeing, see if these part numbers coincide. The great life resuscitator for the SMPS section should have been, replacement of Q624 . . ...
  18. 73's de Edd

    Is it possible to fix old PC monitor

    Why for . . . . .you no give us Brand and Model number . . .. .so that we can research what pin #1 of LOPT goes to ? In addition to D10. And I guesstimate ultor voltage at typically being ~ 1 KVDC per inch of kine screen size.
  19. 73's de Edd

    Multimeter DT9205A problem

    Sir matin . . . . . Why certainly . . . R14 will be a 9 ohm . . . . 0.5% tolerance R15 will be a 90 ohm . . 0.5% tolerance Possibly . . . if being in 10 AMP range . . . . R13 is being 0.99 ohms. OR if HARD to find you might use an easier to find 10 ohm and trim to tolerance by shunting...
  20. 73's de Edd

    Comedy Thread

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