Question about Compaq FS 7550 17" CRT Monitor

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No power power supply not coming after replacing bad STR

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Check voltage at the primary filter then check voltege at pin no 1 of STR dc which should be approx input volt if not then clear the path if present then check check up down volt at pin no 3 if not persent then replace the small capacitor near it the problem will be solved

Posted on Dec 06, 2008

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How can i repair str z2062 power supply of my hp m1005 mfp laser printer ?


First of all; it is DANGEROUS to fix a power supply if you don't know what you are doing. Thus; don't even think about to open power supply tower, if you are not qualified enough.

If you are a qualified person, you can go on with below steps by taking risk on your own.

You must discharge biggest capacitors in order to avoid any fatal electrical shock. Even it is disconnected from electricity plug, power supply may keep high voltage in it for long time. Once you discharge big capacitors; you may diassemble power supply tower. At your question you mentioned about burned power supply which makes it a little bit easier. (I assume you discharged big capacitors) Once you open psu tower; do visual inspection on each capacitor. If there is a burned area start with it. Remove blowed capacitors and replace them with same valued new capacitors. If you can't see the values on blowed capacitors; you need to find board diagram of your psu. Otherwise you can't find suitable one to replace. Besides; check form of other capacitors. If there is a change on any capacitor's form, replace them too. The best way to find out dead capacitors is using capacitor testers. If problem caused by another type item; its not easy to find it as finding bad capacitors.

Nov 19, 2014 | HP LaserJet M1005 MFP Printer

1 Answer

No power supply regulating and str no x6757


The STR or voltage regulator is probably bad. If you are not familiar with soldering and using a multi meter for troubleshooting then I suggest buying another power supply they are not too expensive. Try e-bay. Good luck

Mar 23, 2014 | Computers & Internet

1 Answer

Sony TV has a power supply problem both ics irf1b7n50a in the power supply section are all shorting which number could I use as an equivalent. is there a way I could use a power modular with two power id's


Hi Saidi
Have you checked all the other components used in the main power supply regulator section circuit, before replacing a new STR? You should do it. There should be a reason for the failure to STR. You should find it, and rectify it, before replacing an other STR. Check all the small components, resistors, zener diodes, small value ceramic capacitors etc: Make sure all of it are OK. Especially give a keen attention to zener diodes used; if any. It will be best to replace these diodes, even if you do not find any fault with it with multimeter test.For more information go to http://electronicshelponline.blogspot.com/
Power supply schematics to some popular brand TVs are given. Pull up older posts. Good Luck.

Nov 26, 2013 | Televison & Video

1 Answer

I have a SONY STR DE915 receiver home theater amp. After 14 years, it decides not to power up! Are there internal fuses? Can i replace the power supply myself?


There are internal fuses that you can check. This model was notoriously bad for amp problems. These amps would burn up a lot of components when they go out.

Oct 11, 2013 | Sony STR-DE915

1 Answer

I have sony trinitron wega t.v and when i plug in to switch on.. Light does not come, no sound. Nothing. is it repairable.


hi,
yes , it is reparable. ur tvs smps power supply have some problem. check th fuse first. also check the over surge protector MOV is short or not. also check the STR power drive in the power supply. just relapse. below is the photo of MOV and STR. if u repalce the STR also try to replase the opto coupler also. added the photo of opto coupler.
ok

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Jan 06, 2011 | Sony FD Trinitron WEGA KV-32FS120 32" TV

1 Answer

Worked perfecutly but wont power up after a power outage. What do you think is wrong. Bass bost and hall lights come on.


The power supply is bad. Check for open fuses. If fuses are good, then the voltage regulator in the power supply may have damaged.

Nov 23, 2010 | Sony STR-DE315 Receiver

2 Answers

Ive got a str-dg520 reciever and have a loud hum coming from all speakers have tryed removing all wires then putting back in but still happens


Try replacing the big Electrolytic Capacitors in the power supply section. When they go the let the 50/60HZ hum into the audio from the mains supply.

Mar 02, 2010 | Sony STR-DG520 Receiver

1 Answer

No power on my Sony STR-DA555ES


i went to sony's webite and called direct and got a power supply for just under 200 dollars to my door better than paying 1500 for a new one i over loaded mine and plug to may things in the back of it but the part is available

Jan 07, 2010 | Sony STR-DA555ES

2 Answers

No power -- bad power supply?


The fuse thats leads to the power supply on the sony receiver blows everytime i try to plug in the receiver. What makes this happen and what can i do to get the receiver going again. Model STR-DE135.

Jul 02, 2008 | Sony STR-DE135 Receiver

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