Re: Sony Home Cinema Amp STR KSL5 problem


"Ray L. Volts" <raylvolts@xxxxxxxxxxxxxxxxxxx> wrote in message
news:MB3Af.18399$sq.10742@xxxxxxxxxxx
>
> "Ray L. Volts" <raylvolts@xxxxxxxxxxxxxxxxxxx> wrote in message
> news:6v3Af.18398$sq.13135@xxxxxxxxxxx
>>
>> "Davy H" <dave@xxxxxxxxx> wrote in message
>> news:1137752419.388128.54630@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
>>>I have a SONY a home Cinema system (STR KSL5) which after about 2 mins
>>> shuts down with the word PROTECT in the display screen. I have checked
>>> all the speaker outputs and they are fine, no shorts. I have removed
>>> all the speakers and the same problem occurs. The fan works so doesn't
>>> seem to be an overheating problem. This PROTECT fault occurs even when
>>> the volume is turned right down therefore not driving the amp. Anyone
>>> have any ideas what might cause this fault? and how to rectify it?
>>>
>>> Thanks
>>>
>>> Davy H
>>>
>>
>> Sounds like an overheating (i.e., thermal intermittent) prob to me if
>> it's shutting down after 2 mins. That the fan is functioning doesn't
>> preclude a thermal defect in one or more components.
>>
>> Get a can of component chiller (Freeze-It, et al) and spray each
>> component in the amp chain, beginning with the higher-current devices at
>> the final output stages. Allow the chilled part to warm up before
>> proceeding to the next one.
>>
>
> This is what I get for usenetting when I'm barely awake. Obviously, if
> the protection circuit has shut down the final stages, they won't warm up
> again until the thermal fault is corrected, as power is likely not being
> applied to them. You may have to give blanket coverage to several
> components at once to bring the unit out of shutdown. Once you've
> determined the general area at fault, you can hone in on the specific
> part(s) that is/are causing the problem.
>
>
Bad joints on the output IC pins are very common on Sony A/V amps, and cause
the unit to go into protect like this

Arfa


.

Relevant Pages

  • Re: Outsourcing Security to an Arab Country
    ... near the ports themselves running security. ... port security to have as much skin in the game as possible. ... I want them to protect not only their business or financial interests, ... fault, my fault, nobody's fault...no matter what else happens, I'm gonna' ...
    (rec.gambling.poker)
  • Re: Sony Home Cinema Amp STR KSL5 problem
    ... >> shuts down with the word PROTECT in the display screen. ... >> all the speaker outputs and they are fine, ... >> have any ideas what might cause this fault? ... Allow the chilled part to warm up before proceeding to the ...
    (sci.electronics.repair)
  • Re: Messages received multiple times/Compacting causes error in DIRECTDB
    ... Please respond in Newsgroup. ... Protect your PC ... > doing this any attempt to compact causes a page fault in Directdb (no hit ... > can then compact Inbox and the problem is gone ...
    (microsoft.public.windows.inetexplorer.ie6_outlookexpress)
  • Re: Glass fuses.
    ... This may not protect the equipment in time to save it. ... The thermal inertia is nothing compared to the sustained arc through the glass tube. ... There are FF rated fuses for semiconductor loads, but quite frankly it's still hit and miss whether a standard triac will survive a blast. ... On my own gear I make the triacs as easy to replace as a fuse and generally include basic onboard diagnostics to guide the technicians to the fault. ...
    (rec.arts.theatre.stagecraft)
  • Re: stereo amp cleaning
    ... Any protection circuit is there ... simply to protect the speakers from an amp failure, ... I was going to mention tubes but I'd already gone on too long... ...
    (sci.electronics.repair)