Mine 1st Welcome thread and asking for help

Discussion in 'General Electronics Chat' started by Formingus, Nov 19, 2014.

  1. Formingus

    Thread Starter Member

    Nov 19, 2014
    37
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    Hi to all.
    Hope i am welcome in this community?
    Been member on some other forums but unfortunately didn't get what i search for (team play or leak of help)
    Hope that at last this will be what i am searching for according to activity, views and replays on threads.

    I want to mention that i am good skilled on Mobile (flashing - unlocking) and PC software diagnose repair with over 10 years but non skilled on PCB Repair. I am not totally beginner on PCB Repair , so maybe this will make things easier to get help from you guys. Those was few words about me.

    Going strict to the subject (will post screenshots so members can easy understand what i am looking for)
    Don't say buy a new one. I Know its cheap part but point is that i want to learn :)

    I Have Canon 10D charger with Input 110v-240v AC50/60Hz and Output 8.4V DC 1.2A
    Voltage with connected cord on PCB is 235V so obviously current, cord and connector on board seems to be ok. But when i measure battery output connector it gives me 0.00V and sometimes 0.06V. I will avoid talking of mine opinion where can be problem (power reductor or what ever) because as i say i am beginner for diagnosing those problems. So Please check attached photos and tell me which part's or should i check.
    If somehow i make post in wrong section kindly asking moderators to move it at right section



    Thank you in Advance
     
  2. ISB123

    Well-Known Member

    May 21, 2014
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    Is regulator getting hot while the device is operating?
     
  3. Formingus

    Thread Starter Member

    Nov 19, 2014
    37
    0
    No, nothing get hot. Only red light blinking for hours and hours and battery will not charge.

    thank you for replay
     
  4. ISB123

    Well-Known Member

    May 21, 2014
    1,239
    527
    Did you test the bridge rectifier output?
     
  5. alfacliff

    Well-Known Member

    Dec 13, 2013
    2,449
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    one of the first things in troble shooting is to visually look for anything unusual, the black cylinders are electrolytic caps, they tend to go bad often, look for bulges in the top or signs of something leaking out the bottom. look for burnt or cracked parts, discolored qareas of the pc board, and such.
     
  6. alfacliff

    Well-Known Member

    Dec 13, 2013
    2,449
    428
    find some scrap pc boards to practiced your soldering on, it takes a steady hand and a clean tip on your iron to solder properly. practice with solderwick or a a solder sucker removing parts without trashing the board.
     
  7. wayneh

    Expert

    Sep 9, 2010
    12,139
    3,054
    Do you have a proper battery for this? It's possible that the charger shuts off the output until/unless it sees a voltage on the output pins, indicating a battery has been connected with the right polarity.
     
  8. Formingus

    Thread Starter Member

    Nov 19, 2014
    37
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    Thas't why i post images , not to much familiar with those sentences , it will be highly appreciated if you tell me how

    New thing , after long time on current when i touch Capacitors on picture i get whoopie by current (is normal to get hit by current on capacitor ? see picture its 22hf 400v)
     
  9. Formingus

    Thread Starter Member

    Nov 19, 2014
    37
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    Friend by black cylinders you mean capacitors ?
     
  10. Formingus

    Thread Starter Member

    Nov 19, 2014
    37
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    In this point i have good skills, so i can solder even mm parts , remove anything and so one, Problem is what to remove , replace

    Thank you
     
  11. Formingus

    Thread Starter Member

    Nov 19, 2014
    37
    0
    Yes , battery seems to be ok , when i bought camera i get full set , bag , optical, 2x batteries and so on. Tested with both batteries same thing

    Thank you
     
    Last edited: Nov 19, 2014
  12. ISB123

    Well-Known Member

    May 21, 2014
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    Rectifier bridges are are small IC with 4 pins(2 on left and right).
    [​IMG]
     
    Formingus likes this.
  13. Formingus

    Thread Starter Member

    Nov 19, 2014
    37
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    The only rectifier on this board is this one and its says br1
    But the problem is i cant read with microscope either number so i dont know his values

    Now the hard part :( . Please can you advice how to check ? With power cord connected ? Multimeter selection ?
     
  14. ISB123

    Well-Known Member

    May 21, 2014
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    Measure the output at +/- pins using AC setting on multimeter.
     
  15. Formingus

    Thread Starter Member

    Nov 19, 2014
    37
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    Hear is what i did, sorry for bothering and thank you for trying to help me
     
  16. Formingus

    Thread Starter Member

    Nov 19, 2014
    37
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    Multimeter on diode mode 5.75 and 0
     
  17. Formingus

    Thread Starter Member

    Nov 19, 2014
    37
    0
  18. Formingus

    Thread Starter Member

    Nov 19, 2014
    37
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    Is possible all capacitors to be burned out? Desoldered from pcb measure 4 of them , no one gives values
    Will check with another multimeter too , but is possible all of them to be burned ? and if is possible who can be reason ? BTW They look healthy
     
  19. b1u3sf4n09

    Member

    May 23, 2014
    115
    14
    Which capacitors are you measuring and what are their values? How are you measuring them? Not all multimeters are capable of measuring polarized capacitors. For example, my MS8268 multimeter will not measure aluminum electrolytic capacitors, but it has no issue measuring ceramic or film capacitors. Also, make sure to check the range of the meter to ensure the capacitors in question are within this range.
     
  20. wayneh

    Expert

    Sep 9, 2010
    12,139
    3,054
    If you've already gone to the trouble of removing them from the PCB, I'd replace them with fresh ones. It will only be a few dollars, and will extend the life of the device. Capacitors grow old. Be careful to check the physical dimensions and lead spacing of the new replacements, in addition to the voltage and capacity ratings.
     
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