Looking for specialists advices on a couple of challenges with my newly acquired receiver.
Just bought one HK 330B to pair with Dynaco A25 after a long period of research throught AK threads.
once i fix the couple of little issue with the receiver, i,m hoping i will be happy with it.
Btw, i am really a newbie at fixing receivers but i am here to learn. This is my second project, the first one being a yamaha CR-1040. thats my experience to date And i havent succeeded in fixing it yet, but one day i will !
Ok, so here it goes : the 330B has the following issue.
The left channel has static. Also, when the volume is completely turned down, i can still hear whatever source is sending signal to it. Raising the volume affects both channels, turning it down only lowers right channel.
I also have this issue which was covered in another thread and discussed between Dlucy, captouch and others
http://audiokarma.org/forums/index....se-harman-kardon-330b-resistor-values.476040/
i would replace each of these resistor with 1K 1W (R2) and 2.2K 1W (R4) if this is an acceptable replacement value. I think increasing the value to 1W would make it a better fit based on the feedback in the thread above.
Schematics can be found here :
https://www.hifiengine.com/hfe_down...ardon/harman_kardon_330b_service_addendum.pdf
I am wondering if the dried up resistors (if not dried up resistor then almost fried resistors) on the main and sub rectifier board could be the cause of the static and persistent volume on the left channel. dont hesistate to school me on this topic, i am here to learn.
Also, there seems to have been some tampering with one of the fuse holder. Not completely sure this is totally safe so any advice welcome.
Production code and serial of the receiver are the following : 4343 22936 A which, according to info i have seen on AK makes it a taiwan made receiver. With luck, this is the best production run
Hoping someone with expert knowledge can help
Regards
Jpkwd
Just bought one HK 330B to pair with Dynaco A25 after a long period of research throught AK threads.
once i fix the couple of little issue with the receiver, i,m hoping i will be happy with it.
Btw, i am really a newbie at fixing receivers but i am here to learn. This is my second project, the first one being a yamaha CR-1040. thats my experience to date And i havent succeeded in fixing it yet, but one day i will !
Ok, so here it goes : the 330B has the following issue.
The left channel has static. Also, when the volume is completely turned down, i can still hear whatever source is sending signal to it. Raising the volume affects both channels, turning it down only lowers right channel.
I also have this issue which was covered in another thread and discussed between Dlucy, captouch and others
http://audiokarma.org/forums/index....se-harman-kardon-330b-resistor-values.476040/
i would replace each of these resistor with 1K 1W (R2) and 2.2K 1W (R4) if this is an acceptable replacement value. I think increasing the value to 1W would make it a better fit based on the feedback in the thread above.
Schematics can be found here :
https://www.hifiengine.com/hfe_down...ardon/harman_kardon_330b_service_addendum.pdf
I am wondering if the dried up resistors (if not dried up resistor then almost fried resistors) on the main and sub rectifier board could be the cause of the static and persistent volume on the left channel. dont hesistate to school me on this topic, i am here to learn.
Also, there seems to have been some tampering with one of the fuse holder. Not completely sure this is totally safe so any advice welcome.
Production code and serial of the receiver are the following : 4343 22936 A which, according to info i have seen on AK makes it a taiwan made receiver. With luck, this is the best production run
Hoping someone with expert knowledge can help
Regards
Jpkwd
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