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Repairing Sagem Fast 2804 Router

Discussion in 'Repairing Electronics' started by Mr_Max, Aug 29, 2017.

  1. Mr_Max

    Mr_Max New Member

    Joined:
    Mar 16, 2006
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    Hi everyone

    I have a Sagem router, it wasn't powering up properly 2 Leds were blinking fast in Red every time I try to turn it on
    After checking the Pcb I found out that when I put my finger on that area over the resistor in the red rectangle, the router powers up normally
    and IC SP8K4 gets very hot to touch, when I touch it again the router goes back to the problematic state & the two red leds blink again.
    I though it's a dry solder for the resistor and tried re-soldering it, but it didn't make a difference, it only responds when touched by the tip of my finger
    or when I connect multimeter leads to it's both ends, I tried (without soldering) connecting a 2.2K ohm resistor in parallel the mentioned resistor but now the router failed no leds are blinking and IC ISL6445 gets very hot

    Sagem_Failure.jpg Sagem_Failure_2.jpg
     
  2. Les Jones

    Les Jones Well-Known Member

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    I can see what looks like a splash of solder shorting out the two right hand pins of IC SP8K4. Also measure the resistance of the resistor in the red rectangle. I think it is 850 ohms.

    Les.
     
  3. Mr_Max

    Mr_Max New Member

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    Thanks a lot for your reply, I removed the splash, the Resistance measures 1.4K ohm the same reading before and after the current problem.
    Still IC ISL6445 gets too hot to touch !
     

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  4. dave

    Dave New Member

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  5. RODALCO

    RODALCO Well-Known Member

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    Put a 12 Volts computer cooling fan underneath the router. that will keep the router a lot cooler.
     

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