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  1. bushtech

    Teaching myself LTSpice-XVII & Diptrace....

    Your progress curve looks horribly familiar. Bad memories flood bushtech's brain. Stumbles away muttering incoherently.
  2. bushtech

    Reflow Bga chip.

    Well done, glad it's working again.
  3. bushtech

    Cross Reference for a Hewlett Packard 1855-0566?

    Ooops sorry Harald, you're correct. I must have dyslexiao_O
  4. bushtech

    Cross Reference for a Hewlett Packard 1855-0566?

  5. bushtech

    Cross Reference for a Hewlett Packard 1855-0566?

    on that hparchive search for 1855.0566
  6. bushtech

    Cross Reference for a Hewlett Packard 1855-0566?

    According to this: hparchive.com/Bench_Briefs/HP-Bench-Briefs-1987-07-09.pdf it's a VN2222L
  7. bushtech

    Osram Parathom par16 80328 led voltage

    Oh horse manure, shorted my dmm probe on something, all 6 pins of mystery ic GAG7 shorted. fin
  8. bushtech

    Osram Parathom par16 80328 led voltage

    Thanks st Edd, still trying to get my mind around that one........... no filtering, ripple removal et alo_O You might be interested in two new arrivals: Still too scared to use the scope in anger
  9. bushtech

    Osram Parathom par16 80328 led voltage

    St Edd By W7 do you mean the diode marked D3?
  10. bushtech

    Osram Parathom par16 80328 led voltage

    Thanks for also stepping my knight in shining armour St Edd. Looking at photo in post #3 the centre pin on side closest to fet is connected to the fet leg closest to it ie the RH leg. Correct, no pin indexing on the chip, and I have studied it Apologies, bad picture, hope this one is better. I...
  11. bushtech

    Osram Parathom par16 80328 led voltage

    Thanks for that Martin. Busy retouching the soldering
  12. bushtech

    Osram Parathom par16 80328 led voltage

    First smps I've seen where the output of the ferrite TX directly supplies power to the device, although there is a third output connected to the pcb. Is that how they monitor/control output?
  13. bushtech

    Osram Parathom par16 80328 led voltage

    This light plugs straight into 220V so it's actually a smps problem. I get 330V on the "big" cap.Here's a better photo with some annotations: Is that white thing on the right hand side a resistor? I read 0.8Ω resistance (one side not lifted)
  14. bushtech

    Osram Parathom par16 80328 led voltage

    Got it open: The big cap on top is 6.8uf and the small 6 pin chip is GAG7. Haven't found any info on it yet
  15. bushtech

    Osram Parathom par16 80328 led voltage

    This light stopped working although it has extremely low hours, probably about 10. Now it's a pricey little blighter so I thought I'd take a look inside. The light partially opened: Looking inside, the two wires attached to the pcb. What voltage should I see there? I get about 1000mV dc which...
  16. bushtech

    Wrong wiring??

    Have you tried mantech: https://www.mantech.co.za/Stock.aspx?Query=+switch+push+buttonand
  17. bushtech

    Wrong wiring??

    jbrt: I think that you are not using them for their original intended use. The fact that they came with a push button would imply short usage times. Were you holding down the push buttons for minutes at a time? A push button is not meant for that. Then a switch is normally employed.
  18. bushtech

    Wrong wiring??

    I can't think of any reason to switch neutral instead of live. Maybe one of our more knowledgeable members can help. Maybe the power cables got replaced somewhere to make them fit the plugs in SA. And the person doing it didn't know how/ didn't care/colourblind:)
  19. bushtech

    Wrong wiring??

    To be correct the brown and blue incoming wires should be swopped over in the device. That would make the Live wire switched instead of the neutral. The overheating push button switches could be caused by underspecced switches or there is something wrong with the device and it is drawing more...
  20. bushtech

    Low Battery Voltage

    According to a manual I found you have open the logic door and remove the MCTB. The battery/ies are on there.
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