Search results

Search Forums New Posts
  1. S

    5 pin relay weirdness

    A lot of times this happens when you have corroded electrical contacts (reduced voltage). Are the relay plug-in contacts clean? Are any of the wires to the relay socket, or elsewhere in the circuit corroded at the contact ends?
  2. S

    Akai AA-1150 problem

    I think the next step is to Google your model number and see if you can find a free schematic for your receiver. Looking at a picture is often helpful, but a schematic is like gold when troubleshooting.
  3. S

    Akai AA-1150 problem

    I suppose your guesstimate might be right, but it doesn't make sense to me that individually (one speaker at a time) speaker prrotection does not kick-in. But when both speakers are used, protection engages. My first thought is that perhaps you have your polarity at odds between the two speaker...
  4. S

    Akai AA-1150 problem

    My first suggestion is that if you bought it new from a store, take it back under warranty. My second suggestion is to check your speaker specifications. It sounds to me like maybe your speakers are not rated to handle the output of your receiver's amplifier.
  5. S

    Aiwa AD-F810 Tape Deck

    Yep, sonds like the drive belt. It's up to you if you don't know anybody who'd help you out with this. If you're willing, unplug the unit from power, find and remove the chassis housing screws, and open the unit up to look inside. It's the only way you're going to know for sure if it has a belt...
  6. S

    Safety measures when working with electronics?

    Everything above is good advice for personal safety. I want to add that you need to be aware of the safety of the small electronic components that you'll probably be working with. Higher voltages are dangerous to people, but static electricity is dangerous to semiconductor electronic parts. I...
  7. S

    fried L298N, stepper motor fun...

    I'm not sure why you're wanting to limit your current. Is this a power-saving project, or limited power supply issue? My input here, is that the stepper motor is going to try to draw the current it requires to operate. If you aren't careful, one of these attempts you're going to fry your...
  8. S

    Which one has the lower noise level？Wheatstone bridge or direct measurement?

    I agree with Colin Michell's analysis. As a general rule of thumb, the more components (and types of resistors), and the longer the leads, the more noise you're going to pick-up. I am curious as to why you considered the possiblity that adding a Wheatstone Bridge would somehow reduce the noise...
  9. S

    How to make a rotating socket?

    You need circular conductive rings, with wiper contacts to complete the circuit. Think of an old-style wafer switch as a similar example of how the circuit is completed. There are probably commercially available units that will do what you want. For example, the lighted disco-tech balls found in...
  10. S

    Reference temperature of resistors

    Resistors have different ratings,compositions and tolerances. I'd contact the manufacturer with your application for specific details about their parameters. If you're wondering, you're not going to get one all-encompassing answer for all resistors. If you have one specific family of resistors...
  11. S

    Help Identify IC for SoundMixer PSU

    I've spent 1/2 an hour trying to get a good print of your schematic so I can read it, with no luck. It'll be tough to ID the exact IC without markings, but I can't see enough on the schematic to even hazard a guess at the IC's function. Can you enlarge the section of the schematic in question?
  12. S

    I am confused plz help

    I just did a quick Google search of your amp. (You should too, for more complete information). It was designed as a mono (as opposed to stereo), amplifier for use in guitar applications (but can be used for other mono purposes). Hope this helps.
  13. S

    Repairing old style black and decker toast r over Model #tro200 ty-4

    This is one of those times when I don't think there is a 'safe' repair answer. Using something other than the same alloy could result in a fire. If it's nichrome, the alloy used as heating elements in a lot of toasters, the alloy acts as a resistor that heats when power is applied. Bridging that...
  14. S

    Help Identify IC for SoundMixer PSU

    And are there any markings on that IC? I can't tell from the pictures.
  15. S

    ID this capacitor

    I don't know for sure anymore, the new start-up Pacific Rim fly-by-night mfgrs seem to be coming up with their own marking system. Typically, I would consider it a Date Code. The '11' would be mfgr year 2011, and the '40' would be the 40th week of the manufacturing year.
  16. S

    I am confused plz help

    We can probably help you out if you give us the model number. Typically, an audio amplifier takes an input signal from some other device, a radio, CD player, record player, or the like, and amplifies the audio signal so you can hear it on speakers. Just hooking a pot/speaker up to it, without...
  17. S

    Two phones into one headset.

    I'm not exactly sure what you're expecting to do, but I'll mention my experience. In the service I had to monitor multiple receivers, and used 'split' headphones. One headphone side plugged into one receiver, and the other headphone side plugged into another receiver. That way I could listen to...
  18. S

    ID this capacitor

    The designator on the board below the device is 'VDR3' VDR is 'Voltage Dependent Resistor', or to us techs, a 'Varistor', NOT a Capacitor. It might be easier to identify its value if you check data on varistors.
  19. S

    YAMAHA DSP-Z9 amplifier

    The first thing is to open the unit and look for any blown internal fuses. Make sure you unplug the unit from power, before you open the chassis cover.
  20. S

    stranded wire max.current

    The AWM 2464 is the Underwriters Laboratory rating for the 300V @ 80 degrees C. I checked the Alpha Wire Website and saw no references to amperage. I'd send them an email and ask them.. What you're going to get is a graph that shows a function of maybe Voltage/Wattage vs Temperature/Time. Alpha...
Top