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Sony 909ip protect on becase of shorted output was it because i tried soldering while unplug

Unplug for almost a month i solder external hookup and when trying to test unit it instantly when into protect but i dont think i caused short i think audio card or something that looks like the amp its bad any help appreciated

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Posted on Jan 02, 2017

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petraman7
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SOURCE: Pioneer D711

Hi...
Is there an access cover with screws in it underneath?
MOst of the receivers have something like that.
I would also check the output PCB assby for shorts or opens.

Posted on Mar 24, 2009

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Sony trinitron troubleshooting
Three blinks to standby light to Sony Trinitron TVs denotes; [Three blinks - B+ over voltage protection (OVP), unit goes to the standby mode then displays the 3 blink fault. This is also a problem in the power supply circuit, check T603 and R672. ]. Check the output voltage from SMPS. It will be more than normal. Check all the solder terminals at the primary side of the SMPS, for dry solder. Re-solder all the suspected solder terminals, by applying a little more solder, without making any solder bridge short in between adjacent solder terminals. If you wish to get more details about blinking codes to Sony TVs, check the site linked here.http://electronicshelponline.blogspot.com/ Pull up previous posts there, either by its left side bar, or view it in Timslide option.

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I have sony model no kv-bm14m40 it blinks two times.The voltage on the CRT base which was supposed to be 200 is 235.what do I have to do to solve this problem. I appreciate any help JJ
Hello
Two blinks - B+ over current protection (OCP), unit goes to the standby mode then displays the 2 blink fault. Could be a short in the power supply of any of the circuits
The switched output voltage from the power supply is mor than normal. The normal secondary main supply voltage to this set must be around 135VDC. It is now been exceeded that limit, and the overvoltagg; current protection circuits in the set detects this situation and gives you tow blinks as its indication.
Normally, this fault is common to most of the Sony Trinitron sets. The main cuse for this fault is loose solderings at the SMPS power switching section. Just resolder most of the supected solder terminals by applying a little more solder, without making any solder bridge short in between the adjecent solder points. If needy, replace the secondary voltage filter capacitor [the electrolytic capacitor fitted across the 135VDC to ground. This must help you. OK.

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Tv in standby mode blinks 2 times then pauses and blinks again
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Check your TVs power supply regulator section for any loose sodering points in it. The regulated voltage comes from it is more thatn normal. Check out all the soldering terminals. It is best to resolder all the suspected solder terminals by applying a little more solder, without making any solder bridge short in between adjecent solder points. The fault symptom as reported by sony is:-Two blinks - B+ over current protection (OCP), unit goes to the standby mode then displays the 2 blink fault. Could be a short in the power supply of any of the circuits.
Check for any short circuit in the secondary section of the SMPS power supply section. Check the horizontal output transistor for collector to emitter short.
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2 Answers

My sony STR-DE345 amp says "protect" and there is
The manual says it thinks there is a short circuit on the amplifier output side. If it still says Protect after disconnncting all the speakers wires there is an internal problem. Take it to a hands-on tech.

If the problem disappears, you had a short. Attach speakers one at a time to isolate the cause.

http://www.retrevo.com/support/Sony-STR-DE345-Receivers-manual/id/387bh943/t/2/

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I have a vintage s9910 and the protection indicator lite went on and the reciever does not have sound.
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1 Answer

I have a sony Bravia 40in flat screen LCD model KDL40V3000 does not want to turn on has a red light blinking every 13 blinks it pauses i try to unplug the tv and reset the caple box but nothing happensrsam
Dont think that it is a case of resettting but a possible failure in the main board.The power supply works but is in the protect mode and so it switches offf. the faultt can vary with a faulty capacitorr to a shorted drvier.
It is important to open and look for the voltage short in the circuit by using a good multimeter and opening out the shorted circuit to confirm. Use a continuity test to check for short in large value capacitor/ display drivers/transformers.
If you notice bad solder joints do a touch up solderring job with care not to tamper or bridge circuits.
Credit if this helps.

Aug 21, 2010 | Sony Televison & Video

1 Answer

Sony str-ga7es stereo receiver/surround sound amp. Turn on and "protector" shows in the display. instructions say fix short. Not much help. ideas?
unplug it discharge output voltages with a 1k resistor then resolder the voltage driver ic's these ic's start with up, ie upc2558 , or stk350 etc. you will see the solder rings and cool solder joints around then. Use liquid flux and solder them back to the board. You might end up replacing them but youl never know until you try soldering them first. Larry's Electronics. ledstiles@hotmail.com

Apr 24, 2010 | Sony STR-GA7ES

1 Answer

PROTECT FLASHING
The protect circuit is doing it's job....probably the amplifier
output stage is shorted.....have a technician check it..make
sure any / all bad connects are soldered when chassis is out
for service......................T.

Jan 04, 2008 | Sony STR-DE345 Receiver

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