Help identifying resistor.

Inspector 24
Inspector 24 Posts: 1,308
in Electronics
Can someone help identify these:
ztdptgatm8fb.jpeg
6t07rplqd80p.jpeg

Look like resistors to me but not sure if the values, 1 watt is easy but what is 150j?

Trying to repair my old Yamaha AVR I found bad solder joints and a burned resistor, thread here: http://forum.polkaudio.com/discussion/168638/halp-yammy-rx-v3000-clicks-off-immediately#latest

Thanks!!!
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Answers

  • gimpod
    gimpod Posts: 1,793
    With that green end it doesn't look like any resistor I've ever seen, could it be some kind of a thermistor ?

    You really need the schematics and parts list to be sure.
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  • Inspector 24
    Inspector 24 Posts: 1,308
    Agree, do small ceramic capacitors get made like this? Googling tells me an upper case J denotes Joules...and 150 Joules equals 1 watt/second....But that may mean nothing....I did buy some 1w 150ohm resistors ****-u-me-ing that might be it, but I really don't want to blow it up by guessing.

    Know of a source for the schematics/parts list?

    Or if anybody knows what this little guy is and where to get more?
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  • gimpod
    gimpod Posts: 1,793
    Here's a link to the service manual. Looks complete.

    go-gddq.com/upload/2010-01/10010611523232.pdf
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  • [Deleted User]
    [Deleted User] Posts: 7,658
    That is probably a 1W metal film or metal oxide resistor, what is the part number on the circuit board?
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  • Inspector 24
    Inspector 24 Posts: 1,308
    Oh you are good Gimpod...my google powers need work, I just kept finding regular manuals.

    I'll take a look at it close tonight.
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  • OldmanSRS
    OldmanSRS Posts: 419
    edited February 2016
    Nevermind. I thought it looked like a custom 105J cap rated at either .15 uF or 15 pF. Looking at the your photo of the power supply, it looks like a power resistor, perhaps 150 0hm?
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  • F1nut
    F1nut Posts: 50,561
    what is 150j?

    Letters are used to indicate the tolerance. J would be +/- 5%.

    I agee with Ken that it's a metal film or metal oxide resistor. So, you need to replace with the same type. The value would be 1 watt, 150 ohm 5% tolerance.

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  • Inspector 24
    Inspector 24 Posts: 1,308
    Awesome. Progress. I'm up skiing all day, hopefully have time to check those schematics tonight. And I'll post pics of the resistors I got, hopefully they're the correct ones. :#
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  • Inspector 24
    Inspector 24 Posts: 1,308
    Ok here's what I got:
    ujtb0u02ekrp.jpeg
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    LSi15 LSiC - RX-V3000

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    Parasound HCA-3500 - HCA-2003A - Marantz SR7005
    Sim2 D60 - Dragonfly 106" Panny 500

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  • Inspector 24
    Inspector 24 Posts: 1,308
    edited February 2016
    From the service manual, they are R404, R405, R413, which are apparently 15ohm 1w Metal Oxide Resistors...So I'll be making another trip to the store...Everybody agree here?
    nc8mtunb8c71.png
    3eclcx11c4wm.png
    gi3680n7z1lp.png

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    Parasound HCA-3500 - HCA-2003A - Marantz SR7005
    Sim2 D60 - Dragonfly 106" Panny 500

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  • bikerboy
    bikerboy Posts: 1,211
    Since you pulled 4 of them, measure them. Some should be close to what you think the schematic states..
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  • Inspector 24
    Inspector 24 Posts: 1,308
    edited February 2016
    Finally getting back to this, they were in fact 15ohm, grabbed some new ones and went to it. Quite a bit larger than the factory parts which I'm fine with...took just an ounce of creativity to fit them in the same space and the foil on the PCB had dela
    minated requiring a little point to point wiring.
    9kk39dzvlwi6.jpeg
    6b21rqzklhqu.jpeg

    Also took the opportunity to clean up the volume pot so it works again and repair a bunch of other poor looking solder joints including a bunch on the display, bringing all the dead pixels back to life.

    o1biwz78806m.jpeg

    Glad to have it back. I prefer the the sound of the LSi's on this amp over the stand in Marantz SR7001.
    Thanks for the help everybody!
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    LSi15 LSiC - RX-V3000

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    LSiM707 - 706c - 702f/x - Dual HSU VTF-15H Mk2
    Parasound HCA-3500 - HCA-2003A - Marantz SR7005
    Sim2 D60 - Dragonfly 106" Panny 500

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