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Tried repairing Onida DVD dfx7100 smps faulty, problem with condensor 160v 4.7mfd, zener diode C18, but oscillator IC was blown and could't see the number. Please send me IC number. Thanks, Thangkho

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If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
Circuit diagrams to power regulators [SMPS] to many popular brand devices are given.

Posted on Apr 04, 2015

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6ya6ya
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Posted on Jan 02, 2017

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techman
  • 3130 Answers

SOURCE: your assistance

The Sony part number for these diodes is 8-719-108-12 and yes they are 9.1 volt zener diodes @ 1 watt. I have the service manual for this set if you need it put can only send a large file like this trough a proggy called pand, so if you go to pando.com and get the proggy and leave youe e-mail addy I will send you a copy of this service manual. Good Luck

Posted on Mar 27, 2007

  • 2326 Answers

SOURCE: Mitsubishi cs40507 blown zener diode

It should be at the back cover, just where the model number is. If you have the TV open, it may also be found inside, maybe on or around the tuner area.

Posted on Feb 22, 2008

  • 1 Answer

SOURCE: 54cm Goldstar tv Model no: CZ 20A 90Y

ordinary zener diode

Posted on Mar 28, 2010

  • 2 Answers

SOURCE: tv does not power up

I have seen the schematic, d982 is a 13v 1/2w zener
-GR

Posted on Jun 03, 2010

SOURCE: memorex tv model mt 2274

i have memorex mt 2274 tv's complete service manual ( 2.73Mb size) - everything is given in that manual - kindly send your email address to me i will attach that manual & send to you (free of cost) - below i have shown sample picture from that manual - check components number & value given in this sample picture with those on your tv board to confirm this manual matches with your tv's main board - i got that manual from below shown website .....iam service engineer from bangalore ( computers, laptops, ups, printers, etc... -

vishnuswamy.jpgvishnuswamy_1.jpg

Posted on Jun 14, 2011

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1 Answer

On the power supply unit for compaq fp5315 model pe1233, what value is the zener diode zd984 on the print side of the power board?Titus.


If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
Circuit diagrams of SMPS section of many popular brand devices are given. Search the site by type in the "brand name" to your device, or the IC number used in the "Search box at the top right of the display window of the Homepage" to get gathered related posts.

Nov 27, 2015 | Televison & Video

1 Answer

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

My hitachi 29in ctv power supply 110vac had a problem on zener diode will blown if we switch on the tv. what spare parts to change so that the power supply zener diode will not blown again and the supply...


The secondary output voltage comes out from is more than it should be there. That is why, the protection zener diode blows off, as soon as you switch ON the set. First find and repair the power supply regulator, for correct output voltage. Refer its repair book for details. After repair include the zener diode in place. OK.

May 08, 2012 | Hitachi Televison & Video

1 Answer

When power on SMPS is totally dead chek the fuse; fuse is ok switching transistor also ok pls help


If power out of the SMPS is the issue then a short on the secondary side can also be the issue in which the optocoupler can shut off the feed to the SM driver.
So if your voltage is present at the SM driver and the oscillation of the invertor chopper is good, check on Sm transformer for fault or the secondary ccirrcuit may have short.
If oscillatiion is not present , check and change the Oscillator IC.There are feedback loops into the circuit and the diode/capacitor can also be faulty.

Aug 31, 2010 | Health & Beauty

1 Answer

Burnt Zener diode... Voltage spec??


On the cathode of the zener diode look for a filter cap and check its value the voltage of the zener should be less than the working voltage of the zener. Basicly its likely being used as a shunt regulator as protection and regulation of the voltage. When the zener hits a certain threshold it will breakdown and start conducting to ground until the supply regulates and then it will recover. If the filter cap for that voltage rail was 25V I would guess that the zener would probably be regulating between 12 and 20 volts. I'd pick a 15V Zener its probably +- %10 on the original and any system should be able to take a %10 tolerance as a general design rule.

May 07, 2009 | Emerson Televison & Video

1 Answer

No power at all on dvd players


check if the fuse is burnt, if burnt check the following
bridge diodes,
semi conductors- transistor or ic at power supply
zener diodes,
resistors
all this are at the supply

Apr 17, 2009 | Televison & Video

1 Answer

Sony DVP SMPS unit fault


Hello,
You can get complete power supply as one part from Sony. You can't repair it on component level because components are not available.

Jul 18, 2008 | Sony DVP-NS575P DVD Player

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