20 Most Recent Panasonic SC-HT730 System - Page 3 Questions & Answers

sned it back.....

- 82k  ^  0k  is normal   it is called consumer output. when you go into the + zone   that is studio grade pro audio.  so this is not your problem... i think  either you have a bad output or bad speakers...... try some other speakers,but careful !  not to blow them with loud volume  if they are not set up for this unit.  hope i could help   also try other on board sound settings when trying other speakers       imanfix

If the sound is distorted and is effected by the volume control, the problem is in the "front end". This is not a common problem, but is significantly less expensive to fix than the output section. Try turning off any surround mode and run the unit in plain stereo. Does the distortion still occur? I suspect that it will not. Update this with that info and I should be able to list the probable parts that need to be replaced.

Dan

REPLACE RSN IC(SOUND AMPLIFIER THEN CHECK AND REPLACE 2 -3 SMALL TRANSISTORS TWO 2SC3199 AND ONE 2SD592 THEY RE ON THE AMPLIFIER BOARD,EVEN WHEN RSN IC IS REMOVED SHOULD NOT SHOW F61 AFTER YOU'VE REPLACED THOSE TRANSISTORS

Look at the back side of the TV .
There will be [more than one] composite video in & out
How composite video port looks like typical 3 RCA jacks - std color of ports are Red, White & Yellow. The yellow one is the one - which carries video signal. You can connect - a RCA cable from output of SC-HT730 [yellow] to back of TV.

Most probably there will be at least one Component video behond your TV set [ if the set is HD Ready one] - in other words, If your TV supports component in.
Component Video ports are namsed as Y Pb Pr - if you have so, connect output from SC-HT370 to back of TV.

Recommendation: choose component video - if that is supported in both. That gives much better picture quality.

For some reason this Panasonic unit does not offer surround sound in TV or VCR mode.  I guess their engineers decided it wasnt an important feature!!

What kind of connection are you using? If you are using a component connection or a RGB connection this could be causing your problem check the leads and if so replace new leads.

If you get a F61 error when the unit is powered on then the output ic is bad.Subwoofer has the power amp built into it.You may have damaged the IC with a mixup in the +/- speaker hookup and the common ground connection in the A/B box.Seems your subwoofer will need service.

Unplug all of the speakers and power on.Its possible that one of the speakers is causing the protection circuit to activate.If powered on and subwoofer works start reconnecting one speaker at a time( after powered off) and retest each time.One Speaker may be bad.Its also possible the output ic is failing under a speaker load.There are no fuses related to this issue.If its not a speaker problem then the subwoofer will need to be serviced.

You must determine if subwoofer amp or speaker are bad.Take the good surround speaker and move it to the bad side.If the good speaker does not produce audio the the amplifer is bad.If you use the good speaker in either surround output and it works then your speaker is bad.If you take the small speaker apart the panasonic part number is stamped on the magnet.Locate a service center that will order it for you.

okay, this seems like either the fuse hase blown in the actual mains plug, or the mass fuse inside the device, it looks like this very small glass fuse, same size as an ordinary fuse, its just seethrough. see if you can get a replacement for it, you may need 2 open the unit to check if it has blown, it will be black or a "burnt" colour from inside! if you dont want to open it, take it to any electronics store, they are bound to check for you, but these fuses don't cost more that $1 or 50pence!

hope this helps

this is easy       either bad cord or bad internal power supply.

First, try re-initializing the main unit: While stopped and ?DVD/CD? is the source, press and hold STOP (the small solid square on the unit AND [>10] on the remote control until ?Initialized? disappears from the television. Turn the unit off, unplug it, and turn it on again. Make sure that cd mode is off by Pressing [SHIFT]+[CD MODE] and try your DVD player again. (Make sure your discs are clean, and try several to make sure that is not the problem) Let us know how it works for you, and if we can help you in any other way. Best regards, nightdiver

maybe the sound setting is in mono mode versus stereo surround,this only occuring on older model surround systems.   if that doesnt do it , try unhooking  and then hooking the speakers back up  or ; maybe they are even...................switched      hope i could help            i  man   fixxxxxxxxxxx

The nearest you will get is the service manual. Dowmload the service manual and follow the dissasambly and reassambly instructions to the letter, otherwise it will not work correctly and the timing will be out. https://elektrotanya.com/panasonic_sa-ak20.pdf/download.html

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Try disconnecting all of the speakers except the left and right main speakers. If it works, check the wiring at the back of each speaker to make sure there aren't any shorts between the terminals. Better yet, just inspect the terminals both at the audio unit and the backs of the speakers. Stray strands of wire reaching across to the other terminal or exposed wire on the other side are a common problem. If you have that all cleaned up and still have the error, you may have shorted transistors in the output amp of one of the channels, very likely the subwoofer. This may be caused by shorted speaker wiring, or the amp may have failed on its own. In either case, you would have to replace both of the output transistors for that channel (they may be built into a power amp module, in which case the module must be replaced). This requires soldering skill, and the knowledge to identify the transistors and check them with an ohmmeter. Most of the time, it's a basic job for any skilled electronic technician. (I did run into one model that would have required two days of disassembly labor just to get at the failed transistors - I told the customer that wasn't designed for service and he would be better off buying something different to replace it.)

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