sony amplifier str k750

alimaj · 5th January 2009, 12:13 AM

Hi I have this amplifier hoping to get some help. After power is applied the word UNLOCK shows then PROTECT .Does anyone knows how to unlock, I would be grateful for your help. TIA. alimaj.

Nelson Pass · 5th January 2009, 03:26 AM

Does it do this with no speakers attached?

alimaj · 5th January 2009, 11:00 AM

Hi NELSON ,it occurs with the speakers disconnected, as well as connected. thanks . alimaj.

AndrewT · 5th January 2009, 11:03 AM

is this Sony using frequency and voltage detection to prevent grey imports?

alimaj · 5th January 2009, 11:27 AM

Hi Andrew I do not have a SM , I do not know if it uses that type of detection ( which I am not familiar with). Thanks. alimaj.

alimaj · 8th January 2009, 12:01 AM

Hi I have been able to get the amp .out of UNLOCK ,it is now in PROTECT.This amp. is similar to STR-DE 495P9 EUROPEAN MODEL).Is there anyone with experience with this problem, please share your experience. alimaj.

5th January 2009, 12:13 AM	#1
alimaj diyAudio Member Join Date: Jun 2006	sony amplifier str k750 Hi I have this amplifier hoping to get some help. After power is applied the word UNLOCK shows then PROTECT .Does anyone knows how to unlock, I would be grateful for your help. TIA. alimaj.

5th January 2009, 11:03 AM	#4
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	is this Sony using frequency and voltage detection to prevent grey imports? __________________ regards Andrew T.

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5th January 2009, 03:26 AM	#2
Nelson Pass The one and only Join Date: Mar 2001	Does it do this with no speakers attached?

5th January 2009, 11:00 AM	#3
alimaj diyAudio Member Join Date: Jun 2006	Hi NELSON ,it occurs with the speakers disconnected, as well as connected. thanks . alimaj.

5th January 2009, 11:27 AM	#5
alimaj diyAudio Member Join Date: Jun 2006	Hi Andrew I do not have a SM , I do not know if it uses that type of detection ( which I am not familiar with). Thanks. alimaj.

8th January 2009, 12:01 AM	#6
alimaj diyAudio Member Join Date: Jun 2006	Hi I have been able to get the amp .out of UNLOCK ,it is now in PROTECT.This amp. is similar to STR-DE 495P9 EUROPEAN MODEL).Is there anyone with experience with this problem, please share your experience. alimaj.

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