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  1. 73's de Edd

    Replace power MOSFET in subwoofer plate amp, Sledge STA-1000D

    That cryptic "house number " on the 8 pin IC is as useless as the like crypic numbering on the power FETS. I really don't know of any 8 pin controllers that alternatively feed TWO power FET's . Am I correct in not seeing any other IC's nearby to U101? On the power wiring . . . . I was...
  2. 73's de Edd

    Yamaha receiver won't turn on

    OK then that means that you need to monitor the GREEN dot voltage on each unit and pass back the different voltages that are being experienced by both units.
  3. 73's de Edd

    Yamaha receiver won't turn on

    Sir Rick79 . . . . . Verily, verily now I ask thee . . . . . Is it to be the relay . . . or is it not to be the relay . . . . On the schema snippet with the power relay, I have marked up the area of concern. The relays coil and spst contacts for power switching are highlighted in...
  4. 73's de Edd

    Garment Steamer

    Did you not try the continuity and cycling test to confirm that the old unit is cycling and still being a viably useable unit ??? With its fault . . .actually being insulatively and thermally isolated from making a proper heat sinked sampling of the heating source. Also didn't the numbering...
  5. 73's de Edd

    Need Help Rebuilding Hamm's Beer Rippler Motor

    Sir Clarkr . . . . . Relevant to weak starting torque: Check that ceramic magnet rotor and be sure that no loose chips have sintered off and are present on it, to end up between its outer circumference and the 9 stator pole pieces. Sticky tape or constantly kneading modeling clay removes...
  6. 73's de Edd

    I need the manual for the "Microta Digital Logic Probe 22-303 manual"

    Vell ve 'chust got in undt fresh shipments uf manuals dis mornink . . . . . . . und vud you be wantink vit der right handed or left left handled model ? https://www.scribd.com/document/57582763/Micronta-Logic-Probe-22-303
  7. 73's de Edd

    Need help identifying part

    Arun Kamath . . . . . Looks like WARHAWK . . . . . retreated. BUT he did leave us some of his goooooood Fotie-grafs ! And I never got my questions answered, for making any more in depth analysis. Can you do that now . . . after re-reading my earlier info ?. I think that resistor might still...
  8. 73's de Edd

    Help fixing TV Panasonic TX-P42UT30E

    You are fine on the referenced diodes. Go back and READ the procedure for EVALUATING the condition of the sets power supply, with the subbing in of the lamp for your testing WITHOUT having to use that resistor/thermal fuse link.
  9. 73's de Edd

    Sony Tape Deck TC FX 420R

    Sir Keith Mills. . . . . Initially take DVM and place BLACK probe at marked BLACK square on schematic for ground referencing and then take RED probe and do a DC volts test at the RED triangle to confirm ~13VDC and walk down to the emitter of Q501 to confirm that it is regulating down to ~...
  10. 73's de Edd

    Garment Steamer

    Sir Secret Agent # R791945 . . . . . When I initially saw your post I suspected a fault that was not being associated with your thermal sensing /switching/ thermostat unit. That was being, your use of common tap water in the unit, which could lead up to your potential and probable situation...
  11. 73's de Edd

    Replace power MOSFET in subwoofer plate amp, Sledge STA-1000D

    Sir Ninian Fife McAfee . . . . . . MY OBSERVATIONS and SUSPICIONS . . . . With just a quick rundown of those markups. The left YELLOW boxed area . . . with the BLUE PCB within . . . is the units class D amps small signal portion which feeds via the ribbon cable, to the input of the...
  12. 73's de Edd

    Help identify a resistor without bands

    In that case . . . . . make it 2 watt.
  13. 73's de Edd

    Help identify a resistor without bands

    I'll go for metal film element construction and stay at 2-3 Watt until you put in a side by side dime for size comparison . . . .or a penny . . . . if you are presently being hard up .
  14. 73's de Edd

    wiring capacitor on speaker crossover

    Yes, all of those descriptions are being relevant to a bipolar electrolytic capacitor. Is there an electrolytic being at those rear mark ups that I have shown.. . . . or just other parts connections ? As it is . . . . .your bipolar electrolytic and its shunting .01 are being complete and at...
  15. 73's de Edd

    wiring capacitor on speaker crossover

    Here's the way I am seeing it . . . . . and I can't believe that I saw the whole thing . . . That missing capacitors hole set is probably one of a set of TWO electrolytics that are being twice the capacitance needed, so that there will be an effective halving in value when being used in...
  16. 73's de Edd

    Turntable Repair - Stopped Spinning

    Sir kapnKronik . . . . If the drive motor spins freely by finger power, I would skip initial suspicion of it. Looks like the static voltages of the power supply circuitry are being within reason. Looks like your motor is in the power loop to ground thru the Q101 power transistor and it...
  17. 73's de Edd

    Which other transistors can I use

    To me . . . .Looks like it's just displayed and being all solved for you. Just stick with the specified low drop out regulator instead of a MORE common 7805, so that you will thereby be able to drain down that 9 V battery to its lowest level while still retaining a regulated output. Also...
  18. 73's de Edd

    Constant device failure

    Three quick-initial thoughts come to mind. . . . . . Is the house old enough to have been constructed during that era . . . ( '65ish---'73ish) . . .of some contractors use of aluminum house wiring Also, there is the possibility of there being a poor/ intermittent/ higher resistance...
  19. 73's de Edd

    Need a solution for a sensitive sound sensor

    Back in and end up parking so that you can then pull out forward facing and then be able to leave in a forward direction. I once lived where the traffic was so continual from both directions, that this was THE solution That affords a close and forward view of any traffic and also the...
  20. 73's de Edd

    Help Yamaha psr e343 won't stay on

    I have another schema that uses "500" numbering of those parts in that area but it looks like you have pulled TR501 while mine shows TR502 as being the MAIN power switching transistor, which is a TO-220 cased PNP transistor. Do you have that TR502 part being located / used on your board ? I...
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