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  1. 73's de Edd

    B & O Penta amplifier repair and Tr equivalents

    punkieys17 . . . . . . Did you actually find fault with D5 and D6, with them being so remote from the typical problem area ? Or . . . . . after having found so many bad parts in the power audio area, that you are now being fully into the frenzied . . . . . "off with their heads ". . . ...
  2. 73's de Edd

    Multimeter repair

    . Sir pidja105 . . . . Just an initial stab, but is the battery "hot"? Then put the unit in ohms mode and then use your wetted fingers in progressively compressing the probe tips and switching thru all of its ohms ranges to see if you can get that 1 to change to any other digit...
  3. 73's de Edd

    help in fixing national panasonic stereo model RX - F80 - 2

    pharaon . . . . . I was being very careful with checking out the wiring. I am able to find the specs on the C1217G small flat pack I.C.s. which are associated with the tape recorders /players pre amp stages. However, I can not find any info on the 20 pin 102?0 ( RED wire blocks view) small...
  4. 73's de Edd

    Replacing a faulty SMPS

    . Sir HellasTechn . . . . . . Well . . . .in further contributing to your info pool . . . this is supposed to be the manufacturers schematic for your boards power supply, I have the whole boards schematic if further needed. That power supply failure must be a common problem, as...
  5. 73's de Edd

    Yamaha RX - V 675 wont power up

    . Sr Fernandes . . . . . . I' m from Brazil and I have a Yamaha RX - V 675 it doesn' t powering up anything and it doesn' t stay in standby. I interpret that as the set not coming on, or at the least, of the power and /or / the standby LED just blinking and immediately going off I checked the...
  6. 73's de Edd

    59 ohm resistor

    Jon . . . . . . How in the world could a common alarm circuit really,really,really require a "59" ohm value of resistor yet be so liberal as to spec it at %5 tolerance? Is that value printed on the part or using color bands ? Those bands could shift coloration when being subjected to...
  7. 73's de Edd

    Replacing a faulty SMPS

    Sir Hellas . . . . . DEFINITELY . . . . . No transformer for me either . . . . . with its mere 142 turns on the primary of #22 and even less on the secondaries of 7 and 3 turns of #26. Do a preliminary test of all diodes and electrolytics and then get one of these and go-for-it...
  8. 73's de Edd

    capacitor

    Sir Adrian Polley . . . . . My self., I would want to know some rudimentary initial measurements and output levels. First was that ICP testing out like having a short between two of its leads ? I NEVER have seen one with 3 leads unless the center lead is custom formed to be connected to one...
  9. 73's de Edd

    Akai GX-365D What's this "DL" in capacitor description?

    . Sir RD Smith . . . . . How-to-do-it-to-it . . . . . . . . . You really do need a helping hand . . . after all I have already told you Order these electrolytics: http://www.mouser.com/ProductDetail/Nichicon/TVX2C330MCD/?qs=sGAEpiMZZMtZ1n0r9vR22SmzhV1iNnMtpFvS/jm%2b0oo=...
  10. 73's de Edd

    Amplifier Repair - electrolytic capacitors expose metal top?

    looxuser . . . Can I assume that its safe to inject that isolation cap signal we are using to any IC's that indicate an audio input / path please? . . . . .YEP. You mentioned need for another cap. . . . .That's for when we get to the testing of the electronic function switch I now see...
  11. 73's de Edd

    Motocycle gear change counter

    . Sir Napo. . . . . Could you perceive the utter simplicity of merely using properly VERTICALLY (for required space saving) mounted and properly spaced apart magnetic reed switches and a gear shift tracking, vertical round cylindrical magnet, to activate the particular associated reed...
  12. 73's de Edd

    Making new AC DC transformer for La Z Boy chair

    . Sir Jonawald . . . . . . Well at least we can see that part or all of this hand unit is supposed to be running on 5VDC, supplied by the 7805 regulator on the end. And if you have popped transistors, I might suspicion them to be the larger Q407, Q403 and the hidden one under the hook up wire...
  13. 73's de Edd

    Making new AC DC transformer for La Z Boy chair

    . Sir jonawald . . . . within Post 31 "This goes straight to the remote" And I am interpreting "remote " as being a small unit that you press buttons on to change channels or TV volume . . .be it infrared / ultrasonic sound , or even in "olde dayes" directly wired. With you probably...
  14. 73's de Edd

    Akai GX-365D What's this "DL" in capacitor description?

    . Sir RD Smith . . . . . http://www.chemi-con.co.jp/e/catalog/pdf/dl-e/dl-sepa-e/dl-summary-e-150701.pdf I would think that our 2016 vintage of caps would now be equal or superior to those. Of the two DL caps pointed out : C104 ( the upper one on the PCB) is just used in a conventional...
  15. 73's de Edd

    Looking for a 12v 3.5+A MOSFET

    Mine too . . .for all of their IRF 500-600-700-800 series BUT that was being back in 1990, improvements have certainly changed the performance / price ratios. Noting my last qualifier. The 510 is $ 1.37 and the mentioned PSMN022-30PL is .88. 73's de Edd
  16. 73's de Edd

    Looking for a 12v 3.5+A MOSFET

    . Sir Alec . . . " Why 'soitanly" . . . . a . .la . . .Curley . . . . .looks like one can usually decrypt from within the long string of "gibberish" being within an URL root addee . . .and in doing so, we come up with the specifically directed, right to their stock bin, info as being...
  17. 73's de Edd

    Amplifier Repair - electrolytic capacitors expose metal top?

    looxuser . . . . The next move is proceeding to confirm operation of yet one more gain stage that is being just before the STK power module that you just tested successfully. You will be using the same tuner derived test audio coming in thru that isolation cap. It can be connected to...
  18. 73's de Edd

    Diode J46?

    Nigel . . . . . . I'm here . . .but . . .but . . .but but but , I'm not being Sir Dave . . . . Looks like you can handle the precision resistors, with the only remaining unknown variants now being the: The 2 block ceramic capacitors, are being .0068 Ufd at 10% tol at 100Vdc working voltage...
  19. 73's de Edd

    B & O Penta amplifier repair and Tr equivalents

    . Sires . . . . . Would a mo' bettah schematic of that little jewel , be of any further assist ? I'll be, safely, way up on the very top row in the audience at the peanut gallery, when it comes time to "Crash and Burn" 73's de Edd .
  20. 73's de Edd

    Digital Walking Cane

    For me . . . . .I'll pass . . . . . . .and checking my desk calendar . . ..I further see that this is not being April the 1st . . . . . 73's de Edd
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