Question about Panasonic SA-HE7 Receiver
Thanks in advance to anyone who can help me with my issue. As you may have guess (given the location of this post) I have a Panasonic SA-HE7 which has served me well for almost three years. However, now after about ten minutes of operation, the power will cut and F70 will display on the screen. The only way to remove this is to power off the unit and allow it to cool, after which I will get the same ten minutes of operation before the problem reoccurs. Having searched the F70 issue online, it appears that it usually indicates a blown fuse. However, in this case, the user would not be able to use the unit at all which suggest this is not the case. Also, when I remove the case, of the three fuses inside, all appear to be intact. Another thought I had was that the fan may not be kicking in, hence the apparent overheating, however this is not the case. The fan will start as normal once a certain level of volume is reached. Any help/ideas/comments that anyone can provide would be greatly appreciated. Thanks again James
I now also have this problem. I don't fully understand the instructions given above, can someone please give more detail?
Posted on Dec 11, 2009
Solution #2 worked fine
model panasonic sa-he75
Posted on Nov 26, 2009
I think more detail is needed. What leg of the R1702 resistor do you solder the wire too? One of the legs seems to be connected directly to the base leg of the R1702 transistor. So do I want to solder the wire to the other leg?
Posted on Mar 09, 2010
Hi James. I had just a SA-HE7 for repair. It had a F70 error after 30 min. The solution.: On the DSP board the power on de collector of Q1702 fails. That was because the busses through the board interupted. I have connected a wire between R1702 and the collector of Q1702. I have tested the set now for several days, and the F70 problem is resolved. I hope that this is also the solution for your problem. Regards Ron. Radio TV Service Zeeland. email@example.com
Posted on Jul 05, 2007
Very handy info. After checking all the fuses (all fine). I came across this thread. Fixed the fault by simply refreshing the solder joints on the those components, and others that looked sus around the area.
Posted on Jun 21, 2015
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