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    S-10 Weak Power Supply Fix
    #1
    Join Date
    Jul 2011
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    Traverse City, Michigan
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    Another S-10 hardware problem, seems the power supply IC regulator part # SD 4841 is only rated for 10 watts. Barely enough to run the receiver let alone any external motors or switches. This might be why some people have had re-boots, especially when moving a motor. Other S-10 are using a #SD4844 that specs out at 16 watts, may be why some users say "whats the big deal, mine works fine". Just do an Ebay search for SD4844 and you will find them. If you don't want to solder in a new chip, you can buy the entire power supply from china if you want to gamble for like $10 and change. However some people have reported that those supplies have the same weak SD-4841. Better off to just change out the chip. This might get some of these S-10s going that the thermistor didn't fix.






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    #2
    Join Date
    Dec 2010
    Location
    Calgary, AB
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    13,910
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    Thread stuck!

    Thank you..

    click click b00m
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    #3
    Join Date
    Dec 2012
    Posts
    7
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    Thank a lot for this info

    I will check my S10 PSU

    My S10 reboots when using 110VAC But it run without reboot when using 220VAC !!
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    #4
    Join Date
    Dec 2012
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    7
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    Yes, my S10 PSU has SD4841p PWM Controller.

    My quistion is can I replace it with LD7550BBN PWM Controller which is available in my S9 PSU ?

    After I read datasheets for both pwm , the pins is different..

    So, it can not be replaced by 7550
    Last edited by SharinTv; 12-13-2012 at 01:25 PM.
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