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  1. KrisBlueNZ

    Dehumidifer - Does not Power On. Faulty Power Supply Board.

    No it's not a choke. The circuit reference marked on the board is RF1 - resistor, fusible. And it doesn't look like a choke; it looks like a resistor! I'm not sure about the value. I think the bottom band, which you said was grey, is actually purple/violet, in which case the resistance would be...
  2. KrisBlueNZ

    Guitar help

    It's me that has the terminology wrong. I meant "phantom power", not "parasite power". You mean the plug backshell? No, there isn't much room inside there. Especially not when you have good quality components - plugs with strong cable clamps and thick cable. I don't think that's appropriate...
  3. KrisBlueNZ

    Translate stripboard layout to schematic diagram

    Yeah, that schematic seems to match the stripboard layout you posted. And I agree with the criticisms on that stompbox forum. The biggest problem I see with it is the huge DC swings at the output when you use the stutter effect. If you use it with an amplifier with decent bass response, you may...
  4. KrisBlueNZ

    Battery Charger Repair

    No, I don't think so. You only need one diode for a half-wave rectifier, and anyway, the charred parts don't look like diodes. I've never seen a diode with end caps like that!
  5. KrisBlueNZ

    Guitar help

    Hello and welcome to Electronics Point :) First, I have to know if you are the Crash Test Dummies bassist or not... Perhaps you're a fan and you're using his name? As Gryd3 says, you can't use the signal itself to power the LED - there's not enough energy, for a start. So some kind of battery...
  6. KrisBlueNZ

    Dehumidifer - Does not Power On. Faulty Power Supply Board.

    A multimeter on resistance (Ω) range can indicate short circuit, open circuit, or something in between. Set your multimeter to the resistance range, and with the probes held apart, look at the display. This is the "open circuit" indication. Your multimeter will show this when there is no...
  7. KrisBlueNZ

    Xmas Emergency! - tv power board IC question

    Hi there. Are you still interested in getting this set going? I didn't find service information for it, but from your description, I suspect this IC is a switching power supply, not a relay controller. In that case, when the original one failed, it probably took out a fuse or a fusible...
  8. KrisBlueNZ

    Yamaha RX V2607 amplifier won't power up

    Hi there and sorry for the slow reply! Are you sure that's the right model number? I can't find service information, and when I Googled that model number, all I found was this thread here!
  9. KrisBlueNZ

    Battery Charger Repair

    The other "W" reference components on that board, W5, W6 and W7, are diodes, with the line marking the cathode. If diodes were fitted in the W1~4 positions, they would have formed a bridge rectifier, but it's clear from the original solder that nothing was originally installed in the W2 and W3...
  10. KrisBlueNZ

    Sony Receiver STR - DA555ES Displays "protection fan" when turned on.

    No!
  11. KrisBlueNZ

    Sony Receiver STR - DA555ES Displays "protection fan" when turned on.

    I've seen it. It's a little way down my list of Electronics Point posts to catch up on after the Xmas/New Year break.
  12. KrisBlueNZ

    Changing strobe pattern?

    In reply to your last post. Yes, that schematic looks good. Yes, GM Electronic don't have a 2.2Ω 2W fusible resistor. They do have 10Ω 0.5W fusible resistors at http://www.gmelectronic.com/mrr-10r-fus-p119-384 and you could connect four of these in parallel. I haven't seen fusible resistors...
  13. KrisBlueNZ

    Changing strobe pattern?

    Sorry, I forgot to look into MOSFET driver options from GM Electronic. Here's what I found. If you can use SMT devices, options 1 or 2 would be best but they're not in stock and I doubt GM Electronic would buy a reel of 2000 of them just so they could sell you two. You could email them and ask...
  14. KrisBlueNZ

    How to crack electronic apti?

    What would be the point of pretending to have an aptitude for something you don't have an aptitude for? Do you want to spend the rest of your life doing something you're never going to enjoy?
  15. KrisBlueNZ

    Delayed Circuit connection

    I think you can get gaming keyboards with extra keys that can be programmed to do what you want.
  16. KrisBlueNZ

    Delayed Circuit connection

    Thanks Adam :-) Did you like my Schmitt trigger made from a bilateral switch? It seems like there's always a new way to do things!
  17. KrisBlueNZ

    Changing strobe pattern?

    Yes, definitely you want to minimise the distance between the 4467/8/9 and the MOSFETs. High current spikes flow through those signals and the loop area should be minimised. MOSFETs can be damaged by voltage spikes on the gate. Also, the signals from the MCU to the 4467/8/9 are low-voltage...
  18. KrisBlueNZ

    Translate stripboard layout to schematic diagram

    What Dave said, and there's a connection missing to pin 6 of the LM386. Again, that may not be all the errors. Where did you get the information you used to draw up the off-board components? Can you post a link, so we can check that as well.
  19. KrisBlueNZ

    Soldering problem

    Good advice here. I'd just add that it helps to clean the crud off when you've finished working - isopropyl alcohol on a soft toothbrush, then on a cotton swab is good - so you can actually see what you've done!
  20. KrisBlueNZ

    Looking for feedback on an electronics idea

    Like Dave, I seriously doubt that's the case. The only exception would be niche repair services for high-quality high-value commercial products that are designed to be serviced.
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