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F70 Error on SH-AC300

Hello... I have a problem on my SH-AC300. It displays F70 and unable to process any of audio input, either digital nor line (analog) sources. Does anybody know how to fix it? Many thanks, Don

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Unit has a blown internal fuse. replace it with exact type of fuse and see what happens. if it blows again, it will need to be returned to a service agent

Posted on Dec 10, 2007

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Its showing F70 error on display. Only workd on DVD mode, when i turn it on any other mode it just shows F70, switch power off. All fuses are ok, no any visibly damaged components


The fuse is a part of the problem it is for safety measures
the problem is in between the power supply regulators, capacitors and power amplifier circuit board.
usually a regulator or an output transistor can cause this error.
hope this helps.


its-showing-f70-error-display-only-hsr1hry0r110iqa53bzttpz3-5-0.jpg

Aug 08, 2014 | Panasonic SA-HE70 Receiver

1 Answer

Have a technics SHGE70 and trying to hook it up to a sony STR-K660P. the receiver has a red and white rcs for dvd audio in and red and whitre video audio in. thats all the rca outlets it has. i unhooked...


I see an EQ and a Receiver with NO Tape Loops or external audio sources mentioned.

Are you implying this used to be hooked up and working? Or are you asking how to integrate the EQ NOW after a move?

Normally the receiver would have a defeatable external loop for Tape recording. THAT is where the EQ or any other processor would go.

The following is mostly boilerplate for receivers WITH a tape loop. You need to understand what will and will not work even if you could attach the EQ.

--- Be advised that the engagement of any device in a Tape Monitor loop on a late-model Audio/Video Receiver will effectively tie the receiver down to stereo-only analog sound reproduction. I'll explain.


The connections themselves are fairly simple but it pays to understand what happens in the loop.


In general, any Line-Level external processor (EQ, dynamic range expander, etc) will go into a Tape Monitor loop on a receiver. A Tape Monitor, when engaged, sends the stereo analog signal Out to the Processor, massages it and returns it to the receiver via the Tape Monitor IN connectors to be passed on to the receiver's internal processes (volume, tone, whatever).


Old school analog stereo-only receivers consistently work this way. Newer digital and audio/video receivers introduce a couple of problems: 1) digital sound processing to simulate a variety of soundfields; 2) multiple output channels, either discrete or digitally-generated.


The latter requires that whatever signal is being processed experiences a maximum of one analog-digital-analog conversion.


EVERYTHING analog coming into the modern digital receiver is automatically converted to a digital signal for internal processing unless you choose a STEREO-only or STEREO-Direct setting. Consequently, no further external analog-digital conversions would be allowed if, say, a Tape Monitor circuit was activated, and a possible feedback loop could otherwise be created in a digital-sourced selection (output to its own input), so the unit is wired to treat the Tape Monitor as the first analog step in the process and defeats any pure digital sources.


In a multichannel unit, what would happen to the other channels if you sent ONLY the Front Left & Right out for processing? The rest would NOT be processed. That logical problem also plays into the decision to defeat digital sources if the Tape Monitor is activated. I don't totally agree with the engineers but that's the way it is. Nature of the digital beast. --


http://4.bp.blogspot.com/_TaoBB_L8lt0/TDi__0VSpoI/AAAAAAAAACc/uS9ODAazZi0/s1600/HPIM0718.JPG



If you wanted to Equalize a single external analog source you would have to connect the EQ Line output to either of the two analog inputs ("DVD" or "Video" in your case) and connect your external source to the Playback jacks on the EQ.


Mar 15, 2011 | Technics SH-GE70 Home Equalizer

2 Answers

Hello: I just purchased a DBX 128 and have no idea how to connect it up. I would like to listen to my records as well as tape using the expansion mode. However, it seems like it only hooks up to my tape...


Part 1

Let's establish a couple of things first.

1) You already have the turntable part working.
2) Your receiver has a defeatable Tape Loop.

Be advised that the engagement of any device in a Tape Monitor loop on a late-model Audio/Video Receiver will effectively tie the receiver down to stereo-only analog sound reproduction. I'll explain.


The connections themselves are fairly simple but it pays to understand what happens in the loop.


In general, any Line-Level external processor (EQ, dynamic range expander, etc) will go into a Tape Monitor loop on a receiver. A Tape Monitor, when engaged, sends the stereo analog signal Out to the Processor, massages it and returns it to the receiver via the Tape Monitor IN connectors to be passed on to the receiver's internal processes (volume, tone, whatever).


Old school analog stereo-only receivers consistently work this way. Newer digital and audio/video receivers introduce a couple of problems: 1) digital sound processing to simulate a variety of soundfields; 2) multiple output channels, either discrete or digitally-generated.


The latter requires that whatever signal is being processed experiences a maximum of one analog-digital-analog conversion.


EVERYTHING analog coming into the modern digital receiver is automatically converted to a digital signal for internal processing unless you choose a STEREO-only or STEREO-Direct setting. Consequently, no further external analog-digital conversions would be allowed if, say, a Tape Monitor circuit was activated, and a possible feedback loop could otherwise be created in a digital-sourced selection (output to its own input), so the unit is wired to treat the Tape Monitor as the first analog step in the process and defeats any pure digital sources.


In a multichannel unit, what would happen to the other channels if you sent ONLY the Front Left & Right out for processing? The rest would NOT be processed. That logical problem also plays into the decision to defeat digital sources if the Tape Monitor is activated. I don't totally agree with the engineers but that

Mar 10, 2011 | Audio Players & Recorders

1 Answer

Hello, Can somebody please tell me how I can hook up my Yamaha EQ70 to my Yamaha RX-V663? Thanks very much!


Be advised that the engagement of any device in a Tape Monitor loop on a late-model Audio/Video Receiver will effectively tie the receiver down to stereo-only analog sound reproduction. I'll explain.


The connections themselves are fairly simple but it pays to understand what happens in the loop.


In general, any Line-Level external processor (EQ, dynamic range expander, etc) will go into a Tape Monitor loop on a receiver. A Tape Monitor, when engaged, sends the stereo analog signal Out to the Processor, massages it and returns it to the receiver via the Tape Monitor IN connectors to be passed on to the receiver's internal processes (volume, tone, whatever).


Old school analog stereo-only receivers consistently work this way. Newer digital and audio/video receivers introduce a couple of problems: 1) digital sound processing to simulate a variety of soundfields; 2) multiple output channels, either discrete or digitally-generated.


The latter requires that whatever signal is being processed experiences a maximum of one analog-digital-analog conversion.


EVERYTHING analog coming into the modern digital receiver is automatically converted to a digital signal for internal processing unless you choose a STEREO-only or STEREO-Direct setting. Consequently, no further external analog-digital conversions would be allowed if, say, a Tape Monitor circuit was activated, and a possible feedback loop could otherwise be created in a digital-sourced selection (output to its own input), so the unit is wired to treat the Tape Monitor as the first analog step in the process and defeats any pure digital sources.


In a multichannel unit, what would happen to the other channels if you sent ONLY the Front Left & Right out for processing? The rest would NOT be processed. That logical problem also plays into the decision to defeat digital sources if the Tape Monitor is activated. I don't totally agree with the engineers but that's the way it is. Nature of the digital beast.



Okay, back to the hook-up:


You have to select any available 'tape loop' containing an overrideable analog 2-channel Out and In.


Receiver Tape Out (Rec) - to the External Processor (EQ, whatever) Preamp-, Rec, Line-In;


Receiver Tape In (Play) - from the External Processor (EQ, whatever) Preamp-, Play , Line-Out.



So, to sum up, you can only use the EQ or any outboard processor for analog stereo sources. If you actually want to use an analog recording deck you could place it within the typical Equalizer's own Tape Monitor loop(s). Many have two to facilitate equalized dubbing between decks.

Mar 05, 2011 | Yamaha EQ-70 Home Equalizer

1 Answer

Trying to hook up SH-AC500D to SA-AX720 Receiver. I wanna know the right wires to use. Thank you


Connect the 6-channel analog outputs of the AC500 to the 6-channel analog inputs on the AX720 using 3 RCA cable pairs.

http://archiwumallegro.pl/technics_shac500d_procesor_surround_ddigital_dts-1215399983.html

Digital sources will enter the AC500 and be converted to 5.1 analog output.

Be advised, that input on the receiver will not allow any internal DSP manipulation. WYSIWYG.

Feb 04, 2011 | Technics SA-AX720 Receiver

1 Answer

How to connect my eq to my harman kardon recevier model avr-247


The following is some boilerplate I made up that should explain some usage limitations.


Be advised that the engagement of any device in a Tape Monitor loop on a late-model Audio/Video Receiver will effectively tie the receiver down to stereo-only analog sound reproduction. I'll explain.


The connections themselves are fairly simple but it pays to understand what happens in the loop.


In general, any Line-Level external processor (EQ, dynamic range expander, etc) will go into a Tape Monitor loop on a receiver. A Tape Monitor, when engaged, sends the stereo analog signal Out to the Processor, massages it and returns it to the receiver via the Tape Monitor IN connectors to be passed on to the receiver's internal processes (volume, tone, whatever).


Old school analog stereo-only receivers consistently work this way. Newer digital and audio/video receivers introduce a couple of problems: 1) digital sound processing to simulate a variety of soundfields; 2) multiple output channels, either discrete or digitally-generated.


The latter requires that whatever signal is being processed experiences a maximum of one analog-digital-analog conversion.


EVERYTHING analog coming into the modern digital receiver is automatically converted to a digital signal for internal processing unless you choose a STEREO-only or STEREO-Direct setting. Consequently, no further external analog-digital conversions would be allowed if, say, a Tape Monitor circuit was activated, and a possible feedback loop could otherwise be created in a digital-sourced selection (output to its own input), so the unit is wired to treat the Tape Monitor as the first analog step in the process and defeats any pure digital sources.


In a multichannel unit, what would happen to the other channels if you sent ONLY the Front Left & Right out for processing? They would NOT be processed. That logical problem also plays into the decision to defeat digital sources if the Tape Monitor is activated. I don't totally agree with the engineers but that's the way it is. Nature of the digital beast.


Okay, back to the hook-up:


Any of the following audio connections on the HK will work: Tape, Vid1 or Vid 2.


Receiver Tape Out (Rec) - to the External Processor (EQ, whatever) Preamp-, Rec, Line-In;


Receiver Tape In (Play) - from the External Processor (EQ, whatever) Preamp-, Play , Line-Out.


So, to sum up, you can only use the EQ or any outboard processor for analog stereo sources. If you actually want to use an analog recording deck you could place it within the typical Equalizer

Feb 04, 2011 | Harman Kardon Audio Players & Recorders

1 Answer

How do I link my technics ge 70 graphic equaliser to my technics cd player sl-pd7a and my technics md player sj-md100 with phono rca leads . Thank you Simon


It would help to know what other electronics (receiver, maybe?) is involved.

If neither of those devices is a recorder, why do you need to connect them to the EQ when your receiver/preamp may have the facilities to connect the two playback devices directly; and the EQ in a Tape Loop?

Scenario A)

Assuming you REALLY want to have the CD and MD input through the EQ because you can't attach them any other way...

CD audio OUT to Line In; MD audio OUT to Playback;

EQ LINE OUT to whatever analog electronic inout you have in mind.

To hear and Equalize the CD set the Input Selector to Source, EQ REC button OFF; to hear the MD equalized set the Input Selector to Tape, EQ REC button OFF.

====

Scenario B:

You have a receiver with only ONE Line Level Aux input and a Tape Loop.

Insert the EQ in the Tape Loop. Attach one of the disc players to AUX and the other to the TAPE conenctions on the EQ.

====

Scenario C

You have a Home Theater System or Audio Vido Reciever.

The following is some boilerplate I made up that should explain some usage limitations.


Be advised that the engagement of any device in a Tape Monitor loop on a late-model Audio/Video Receiver will effectively tie the receiver down to stereo-only analog sound reproduction. I'll explain.


The connections themselves are fairly simple but it pays to understand what happens in the loop.


In general, any Line-Level external processor (EQ, dynamic range expander, etc) will go into a Tape Monitor loop on a receiver. A Tape Monitor, when engaged, sends the stereo analog signal Out to the Processor, massages it and returns it to the receiver via the Tape Monitor IN connectors to be passed on to the receiver's internal processes (volume, tone, whatever).


Old school analog stereo-only receivers consistently work this way. Newer digital and audio/video receivers introduce a couple of problems: 1) digital sound processing to simulate a variety of soundfields; 2) multiple output channels, either discrete or digitally-generated.


The latter requires that whatever signal is being processed experiences a maximum of one analog-digital-analog conversion.


EVERYTHING analog coming into the modern digital receiver is automatically converted to a digital signal for internal processing unless you choose a STEREO-only or STEREO-Direct setting. Consequently, no further external analog-digital conversions would be allowed if, say, a Tape Monitor circuit was activated, and a possible feedback loop could otherwise be created in a digital-sourced selection (output to its own input), so the unit is wired to treat the Tape Monitor as the first analog step in the process and defeats any pure digital sources.


In a multichannel unit, what would happen to the other channels if you sent ONLY the Front Left & Right out for processing? They would NOT be processed. That logical problem also plays into the decision to defeat digital sources if the Tape Monitor is activated. I don't totally agree with the engineers but that's the way it is. Nature of the digital beast.


Okay, back to the hook-up:


Receiver Tape Out (Rec) - to the External Processor (EQ, whatever) Preamp-, Rec, Line-In;


Receiver Tape In (Play) - from the External Processor (EQ, whatever) Preamp-, Play , Line-Out.


So, to sum up, you can only use the EQ or any outboard processor for analog stereo sources. If you actually want to use an analog recording deck you could place it within the typical Equalizer

Feb 01, 2011 | Technics Audio Players & Recorders

1 Answer

Help trying to run the tv through the stereo where do the leads go from the tv into the stereo


Specifics regarding equipment would be helpful since we have no idea what connectors are available on either end of this problem.

TV's are usually not the root source of anything and are not known as hi-fi audio sources but almost everything THEY hear comes from one (cable/sat/dvd/Blueray).

Generally, I would get the BEST digital audio from the original TV-related source and bring it into the receiver/control amplifier for processing if possible. Failing that, use analog RCA cabling from the source to any available Line Level input but be mindful that multichannel info is only carried digitally.

If theTV does have an RCA analog audio input you could also run your cable/sat box analog audio output into it for lo-fi TV listening (news, weather) through the TV speakers, if it has them.

Dec 24, 2010 | Technics Audio Players & Recorders

1 Answer

Panasonic SA-he75, displays an F70 error.


The F70 error is a code for "protect". See the link below for a general explanation of protect mode. Specifically for your unit, the output amplifier IC has failed. This can be replaced, but the parts cost will be in the $100 range. Please update this if you have further questions.

Thanks,
Dan

Link: http://www.fixya.com/support/r5390728-protector_means

Oct 08, 2010 | Panasonic SA-HE75 Receiver

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