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Kb-3150 94v-0 burn IC 301 S11L what is that IC? PWM ? Which analog to replace? Thanks

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My PIXMA MP970 printer abruptly lost power. is it due to fuse problem and where is the fuse box?


Dear
The printer has the step down SMPS which supply the low voltage (generally 24V DC to the other component. It contains high voltage risk also the high frequency. Sound knowledge is required while repairing the SMPS also appropriate precaution. If somebody is present having electrical knowledge during repair is better.

First disconnect the electricity supply cable from the printer
open the smps, check visually for any physical abnormality of individual component, then check the fuse for open,if its open check the MOV,mosfet,capacitor,bridge/zener diodes for short if found replace with same value,
take a series lamp of 15W incandescent bulb, connect the smps, check the voltage at secondary output. utmost care should be taken with attention of co-worker while checking live circuit.
If there is no voltage, check primary component at area of PWM IC /replace PWM ic (smd).

Again FATAL ELECTRICAL SHOCK AND FIRE MAY HAPPEN IF CARE NOT TAKEN.

Thanks.

Feb 13, 2015 | Canon PIXMA MP970 InkJet Printer

1 Answer

How do i fix my panasonic crt tv model tc-21xy3 no power


The power supply circuit is faulty. Generally you have to be good with electronics to do it by yourself. Unplug the tv before opening and servicing! Check the fuse, check the capacitors and replace inflated ones, check the transistor that gets signal from the PWM IC. Check the power to the PWM. Replace the small capacitor that stabilize the voltage of PWM. Replace the optron. If your PWM is burned out, you have to check the entire powering circuit - diodes, resistors etc. and replace all at once with PWM. Only one faulty element will burn down entire circuit again.

Oct 09, 2014 | Panasonic Televison & Video

1 Answer

How do i get parts for behringer b215d my power ic is burn out


Regards, urgent help.

I have a powered speaker Class D, and the PWM isdead. change the IC 3525, is controled by a NE555 which is shutting down. works when connected to a higher voltage 150v, but turned it off, I think by overheating. I already changed mosfets, and ICs. I think that may be some component failure is triggering the protection, someone could help me. I'm a musician and I depend on this car for my livelihood. Thanks

Jan 06, 2012 | Behringer B215D Powered Speaker (550 Watts...

1 Answer

I need sheme for YPLM-M003B of LG L1717S-SN.IC in primar of power supply is burned.


I have this power board,LAF0001 pwm is the only use IC.

20 pin Inverter IC labeled (0zl68GN VKo257 5T 0647B1)
and 2 8 pin dip IC

Sep 10, 2011 | Televison & Video

1 Answer

What do the control knob numbers mean. Does the lower the number mean less humidity?


If you have an analog unit the humidity extraction knob should be turned to Maximum.

If you have an LED screen, the arrow down button is what determines the amount of humidity to be removed and maintained. In this case, the lower the number does mean less humidity.

On an analog unit, it's the higher numbers that determine the lower humidity levels.

I hope this helps you and thanks for choosing FixYa.

Aug 16, 2011 | Comfort-Aire BHD-301 Dehumidifier

1 Answer

ATX-300-12Z was hit with a power surge (thought we had a surge protector). Green light on power supply blinking at 2X/second. No power at USB devices (or anywhere else.) PC was on when surge hit.


There were 2 Switching power supply circuit inside the ATX PSU. There's a Standy PWM circuit whichSupply +5V to the PWM IC of the Main PWM. Stand by pwm still working or insufficient voltage, lower than +5V. This is the reason you still have Green light. Check or replaced small filter capacitor around 100 MFD 16V, open resistor or shorted diode that was nearest of the PWM IC..
Watch out for charge voltage on big capacitors.

Rleo

Dec 30, 2010 | HP ATX-300-12Z (ATX30012ZBD) 300-Watt...

1 Answer

Hello, I am trying to fix the monitor LG L1951s that does not power on, I found the 68uF*450V capacitor bad, replaced this one but problem ramains. I have measured most of the componets on the power board...


The 68UF 450 is for the primay smps driving side, are you getting about 160vdc on that cap?
The PWM IC get the kick start DC voltage from the main bridge rectifier thorough a bunch of high resistance resistor to drop the 160vdc down to aboit 15vdc, once the PWM IC start working, one the winding will be the supplying the voltage to the IC to keep it running. If the DC output side detect short cirsuits (drawing too much current) it will go into shutdown, you need to find out if the inverter circuits has short circuits. The 5vdc and the 12~18vdc power supply will be running the minute you plug it in, you can solder in a 12v bulb at the DC output that feeds the inverter circuits (you can solder it directly on the DC filter caps for the 12~18 VDC filter caps of the inverter circuits). See application notes how this IC is used.
http://www.fairchildsemi.com/an/AN/AN-4129.pdf
http://www.fairchildsemi.com/ds/FA%2FFAN7601.pdf

No blown MOSFET on the primay side?
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide

http://s807.photobucket.com/home/budm/allalbums

http://en.wikipedia.org/wiki/Capacitor_plague

Aug 21, 2010 | LG L1951S-SN (Silver, Black) (Black,...

1 Answer

No power on


if sb +5 is ok then check one by one these component :-
check main swithing transistor for open
check diode, capesetor and 3.3 ome resitor it may be open after then check
+ 12 to +18 volt for pwm ic and ,

if votage is not missing then change pwm ic

Apr 21, 2009 | Dell - NPS-200PB-73M (NPS200PB73M) Power...

1 Answer

Explorer unable to read dvd+rw disc


Here, If u write into Blank cd\dvd using nero software, it will show the datails about ur disc status of remain sapce and used space.

And if u already write a files into on disc,
select ur combo drive, see thats properties.
0
Thanks & Regards

Manikandan.S

Dec 10, 2008 | Microsoft Windows XP Professional With...

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