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  1. 73's de Edd

    Help repairing Samsung VHS/DVD Combo - No power

    I did not know that you had a cap meter . . . test the 330uf capacitors..
  2. 73's de Edd

    Unresolved issue related to power-in

    Sir Benny7440 . . . . . Your unit was made for 220 VAC line use which rectifies to ~ 320-340VDC, but they additionally used a doubler circuit and ended up with ~ 640 VDC feeding to the mosquito shock grid. In your case, with having only 120 VAC input, it needs to be voltage quadrupled. The...
  3. 73's de Edd

    Help repairing Samsung VHS/DVD Combo - No power

    Sir WyluliWolf . . . . . O.K. I saw the displays wild up and down, swings with ~78 VDC on the low side and up to ~160 VDC on the high range. With that range of the swings, I believe that you will find low capacitance E-cap on the 5.8 VDC supply that the regulation circuitry makes its corrective...
  4. 73's de Edd

    Projector color wheel wiring

    Sir camilozk . . . . . In its former life, your 3-PHASE BRUSHLESS DC. MOTOR was typically connected to this family of driver chip. See a typical application on page 10 and the pins 5-8-9-and 10 connections to the motor...
  5. 73's de Edd

    Wiring on Pedal Assist Bike

    Sir joseph Jerome E. Sanchez . . . . A CONTINUANCE . . . . Reference to post #11 and its 2nd photo down where we see that the male connector from the sensor plug mates with the female connector that goes down to the control electronics. With that plug in process, there is being a...
  6. 73's de Edd

    Yamaha T-60 Tuner

    Let's start with finding the audio R and L channel output jacks on the rear of the unit. Over to their side is a slide switch that I believe will transition between the present 10khz station separation to your needed 9khz interstation spacing for AM, and I believe that will coincidentally...
  7. 73's de Edd

    Yamaha T-60 Tuner

    Sir multimaxfm . . . . . I'll just bet that you will wait for another 15 years . . .maybe ? . . . . for that specific photo request for that specific, somewhere rare vintage unit. Here goes . . . REFERENCING . . . . . . Top left corner is a block diagram of unit Bottom left corner is...
  8. 73's de Edd

    Help repairing Samsung VHS/DVD Combo - No power

    Looking at your blue marked test point come down the heatsink to the WHITE block ceramic cased power resistor. To the left are 4 diodes that constitute a discrete build up of a full wave bridge rectifier, the furthest diode of the four at the edge of the board is the one where you want to use...
  9. 73's de Edd

    Wiring on Pedal Assist Bike

    Unfortunately . . . . View attachment 43281 Did not make the trip . . . hopefully, that was being a full face on photo of the meter or at least its brand and model number.
  10. 73's de Edd

    Microphone Replacement

    Sir rauld . . . . . Both are being Electret microphones . . . . . .and they are superb little units . . .but your solution may just be in getting it on up MUCH closer to your mouth. But it needs a shielded wire run, and the polarity for both units are being as per the one that is shown...
  11. 73's de Edd

    Electrolytic capacitors: Opinion required please

    Sir Ray Pooley . . . . . To err is human . . . .and I think that you have erred . That product brand offers either rosin flux based or acidic / base active agents . In your situation, the choice ended up in a strong base active agent that is dissolved within a isopropyl alcohol solvent /...
  12. 73's de Edd

    Fix A Noisy Refrigerator

    All of my past experiences have been related to fan /bearing shrieks. Give us the brand and model and the area that the noise seems to be originating from, and is it also having a separate freezer section ?
  13. 73's de Edd

    Help repairing Samsung VHS/DVD Combo - No power

    Sir WyluliWolf . . . . . . ( not to be confused with Wily E. Coyote. ) To FULLY allay your fears and worries ingrained in your mind . . . ..about . . . " that zener diode". It seems that zener diode is directly across the power supply section that is derived from the transformer winding terms...
  14. 73's de Edd

    Casio CTK-2080 not turning on

    How about a almost microscopic fracture of one of the units PCB's and a resultant hairline crack that extends across several foil paths. When touching . . . . . connection is made . . . . .when flexed or vibrated . . .discontinuity occurs. Or possibly the same situation, if a plug /...
  15. 73's de Edd

    Transistor Tyristor x-FET

    Mah' fren . . . .and you are mah' fren . . . . . . You have done went and founds yerselfs a SCR, with its Anode Cathode and Gate elements . Organ- i-cally speaking . . . . . now refer to : https://ssl.tonewheelgeneral.com/build_page.php?category=Components&subcat=Semiconductors And you will...
  16. 73's de Edd

    Wiring on Pedal Assist Bike

    Sir joseph Jerome E. Sanchez . . . . emilio arrenales santiago catalan de la garza VON gonzalez y hernandez . . . . . la Tercera With reference to your supplemental photos . . . .their views have now heavily favored the BLUE wire to be the sensor to microprocessor controller, informational...
  17. 73's de Edd

    Help repairing Samsung VHS/DVD Combo - No power

    Sir WyluliWolf . . . . . . I think what you may have yourself, there, is being a " soft " failure. Should it have been a HARD failure, fully expect a blown line fuse-Rectifiers- and that Power transistor. The final fault analysis should probably reveal either a time evolved onset...
  18. 73's de Edd

    Unresolved issue related to power-in

    Sir Benny7440 . . . . . Take the applied final info of yours at the bottom and now see if the parts layout and connections at the top, are now properly making a reverse engineered duplicate of the units board. NEW PCB REFERENCING . . . . . 73's de Edd . . . . .
  19. 73's de Edd

    Unresolved issue related to power-in

    Sir Benny7440 . . . . . I'm still being limited by the blurry pic and being unable to see the three caps side of the board close up . Instead, will you confirm if I have accounted for all of the boards Copper Foil pads and the present placement of parts connections. Look at each pad and count...
  20. 73's de Edd

    LCD screen to wide ribbonImage control PCB

    Photo for confirmation . . . . . .
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