Search results

Search Forums New Posts
  1. kellys_eye

    Portable Induction Cooktop Error Code EA, then Eb When Turned On

    If the thermistor checks out then you need to look at the 'other side' of the comparator circuitry that develops the status signal. It may just be a single resistor or it could be a reference voltage from a zener or stabilized source. There might even be an adjustment to set the switching...
  2. kellys_eye

    Portable Induction Cooktop Error Code EA, then Eb When Turned On

    No point in guessing what error codes mean - they are, if not listed in the user manual, meant for the manufacturers use only and they'll nearly always cite IPA (intellectual Property Rights) and tell you nothing! For the most part I wouldn't even bother trying to repair one. They are high...
  3. kellys_eye

    "Similar Threads"

    I made a motion earlier - does anyone want to carry it?
  4. kellys_eye

    TFT Screen problem (Toshiba TECRA 730CDT)

    Try changing the screen resolution/refresh rate.
  5. kellys_eye

    my busted psu

    Lots of paralleling on that board. You can see how the relays are used to switch between taps on the secondary and the diode 'packs' along with the smoothing capacitors are connected in parallel. It should be very straight forward to apply 'any' AC voltage to that board to trace the resultant...
  6. kellys_eye

    Help repairing car stereos: Delco 90's CD & tape player

    Yep, it's a ceramic resonator only a 2-pin variety, not the 3-pin I linked to above. They are readily available BUT they are also pretty reliable too so I'd be surprised if it's a dud or off frequency. The only way you can tell, without recourse to a frequency meter or oscilloscope, is to...
  7. kellys_eye

    Vintage Transformer Test - Which Pins?

    Gardner transformers are noted for their robustness and longevity so provided there is no obvious signs of overheating you'll probably find it works perfectly.
  8. kellys_eye

    How do I determine if an RF signal is transmitting? Re: Weather station

    If the three individual (?) senders are not displaying then the likelihood is that the RECEIVER is shot! as it's highly unlikely three senders would all fail at the same time.....
  9. kellys_eye

    Vintage Transformer Test - Which Pins?

    No, AC mains NEUTRAL goes to '0' and LIVE to either the '220' or '240' pin depending on your local supply voltage. You can 'add' 10V by using the '10' pin instead of the 0 pin to get 230V or 250V as the input. The OUTPUT are the terminals 250-0-250 (i.e. 500V center tapped) at 25mA max with a...
  10. kellys_eye

    Help repairing car stereos: Delco 90's CD & tape player

    It's possibly a ceramic resonator, 12MHz similar to this: https://www.digikey.co.uk/en/products/detail/murata-electronics/CSTLS3M58G53-A0/7595586?utm_adgroup=Resonators&utm_source=google&utm_medium=cpc&utm_campaign=Shopping_Product_Crystals, Oscillators, Resonators&utm_term=&productid=7595586...
  11. kellys_eye

    my busted psu

    Show a pic of the bottom side of the board too please!
  12. kellys_eye

    my busted psu

    The schematic doesn't match the circuit board for one...... The basic principle is simple - the standard series regulating circuit (built around a load of heatsinked power transistors) is fed from a DC supply whose output itself is determined by the range in use. As the output (selected)...
  13. kellys_eye

    my busted psu

    Check out posts with pictures in other threads - no one else seems to have any issues with pic quality. Give it a go - you have nothing to lose and, potentially, a lot to gain.
  14. kellys_eye

    Looking for a service manual / schematic

    The datasheet often gives a good insight to the operational aspects of the SMPS and here's the relevant bits for the 1203P60 device you mention: If the MOSFET shorts or the driver fails 'high' then it can be seen that this will cause damage to the bridge rectifier and (potentially) any parts of...
  15. kellys_eye

    my busted psu

    Are we gonna see any actual pictures of the insides etc? It would certainly help.
  16. kellys_eye

    70's style music lightbox

    "Color Organ" was another name for them.
  17. kellys_eye

    Looking for a service manual / schematic

    Just replace IC601 anyway - far simpler and, if you're ordering parts anyway, only a few $ (or less).
  18. kellys_eye

    Problem with Ramp signal Generator using IC 555

    More to the point, what are the defined values for the components used in the simulation software?
  19. kellys_eye

    Looking for a service manual / schematic

    Switched mode power supplies are pretty much all the same these days so fault finding follows a set method that those who know how (and that's the problem!) manage to follow quite easily. If you can post pictures of the board we can offer some more specific test instructions and, perhaps, talk...
  20. kellys_eye

    Looking for a service manual / schematic

    This was probably the cause of the issue to begin with. Such a shorted MOSFET will inevitably take out fuses, capacitors etc and since you didn't replace the actual faulty component the fault just re-occurred! Only this time it's taken out even more parts! You might find that Googling the...
Top