Question about Panasonic PV-7451 VHS VCR

2 Answers

Panasonic VCR pv-7451: No sound in "normal" mode

Hi, when I playback a casset tape in "normal" mode the VCR does not playback any sounds, but when I switch to HiFi mode it has sound. This is troublesome because I have lots of tape that's in normal mode only (no HiFi), and all of them I don't have sound. Is the VCR broken? Did I miss a connection or a button somewhere? I tried all the menus. Help! Thanks!

Posted by on

  • 4 more comments 
  • Daniel Sun Jun 28, 2006

    These are prerecorded tapes.

    I just tried recording a tv-channel with the vcr again:
    I set the audio to "mono", recorded for about 30sec.
    When I played it back, again, HiFi option gives sound and the Normal option has no sound.

    Thanks for your help.

  • Daniel Sun Jun 28, 2006

    How exactly do I "turn off" HiFi? That's what I've been trying to figure it out? I sure sound dumb here, but there's no such a button on the VCR, and the button on the remote doesn't do anything, lol.

    The tapes in question are ALL Normal. There's no HiFi Option for them when I press the "HiFi" button on the remote, and so no sound from the tapes.

  • Daniel Sun Jun 28, 2006

    Just to make things clear, when I put in a pre-recorded tape that is NOT HiFi (normal only) I do not get any sound from the VCR.


  • Daniel Sun Jun 28, 2006

    Thanks for that suggestion. I took the top off, and cleaned what you suggested according to this guide:

    waited 5 min, popped in a tape, and still the same result: sound exists under HiFi, and No sound under "normal".

    I wonder if it's a circuit thing?

  • Daniel Sun Jun 28, 2006

    The "HiFi" button is found on the remote and no such switch on the VCR itself. If the tape has both HiFi and Normal, I can switch using the remote; but sometapes only have Normal, and pressing the remote doesn't do anything.

    When I play a tape that has both HiFi and Normal selections - if I select HiFi with the remote it produces sound, and if I select Normal it has no sound.

    When I play a tape that has only Normal as its selection, it has no sound.

    I have opened the top and cleaned as the person suggested.
    Is there something else I could do?

    Thank you

  • sloots Aug 11, 2008

    I have a panasonic vcr I do a lot of taping but recently the picture is there but no sound. Cornelia



2 Answers

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that got 5 achievements.


    An expert who has written 50 answers of more than 400 characters.


    An expert who has answered 200 questions.

  • Expert
  • 275 Answers

This is a wierd problem. First, You cannot do a manual selection for Mono / Stereo (HiFi) for recording in most Consumer Home VCRs. It is auto select, depending upon make, model, etc. Output of course can be selected - Mono, Stereo, HiFi, etc. Now, Most HiFi VCR machines have their Stereo / Hi Fi Audio heads on the Drum assembly, and the Normal /Mono audio Head on the Audio- Control Head. It is entirely possible that just the Audio - Control head has become 'dirty'. If you are good at these things, Unplug your VCR, Open the top cover, and, taking a cotton bud soaked in a few drops of iso-propyl alcohol (any Aftershave lotion will do) clean the Audio control Head. It is found as a small steel block on the mechanism, near the Capstan Pinch Roller ( a great big black roller). Wait for a couple of mins to allow the alcohol to evaporate, and then close the VCR. Power it up, and try playing the Pre-recorded Normal Tapes. Let me know if this has solved the problem.

Posted on Jun 28, 2006

  • Pravin Gupta Jun 28, 2006

    I have attached a image of how a Audio Control Head looks.

  • Pravin Gupta Jun 28, 2006

    AC Head Picture


  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert whose answer got voted for 500 times.

  • Master
  • 3,130 Answers

Are these prerecorded tapes or ones that you recently recorded? Or are they all normal audio tapes?? Try a pre recored and turn off the HI fi audio and thats an easy thing to do as put it in normal and mono.. Get back to us so we can assit. Not enough info as could be 100 things.

Posted on Jun 28, 2006

  • Larry  Dillon
    Larry Dillon Jun 28, 2006

    First off Please dont contridict me SIR!! As I do know what im talking about!!! There called ACE Heads not ac!! ie "audio-control-erase" heads. And if one became so dirty that they didnt pick up normal audio, they also couldnt track properly, as they also have the control or speed control head on the same head. AND sorry to say sir Ive seen an switch on several VCR's that do allow switching between differant audio tracks. look at the panasonics as well as the JVC's been doing this since they were only 3/4 inch versions . This persom probably has an electronic problem as a coupling cap or processor IC as a problem



1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Panasonic pv-v4624s says heads need cleaning. how do i do that?

You need a head cleaning tape, it is made just for this purpose. Walmart has them.

Sep 06, 2016 | Panasonic PV-V4624S 4-Head Hi-Fi VCR,...

7 Answers

No sound when using Sony Camcorder


Did you check that you didn't mute the sound when recording?

May 11, 2008 | Sony Handycam DCR-TRV18 Mini DV Digital...

1 Answer

Hello! the problem is that the cassete holder failed to switch to "compact cassete mode", and it is blocking.

vhc-c adapters? is that what you mean, is the battery that brings the tape out of the shell dead (aa)
retracting the tape means that the vcr does not recognise one of 4 safety states and rejects the tape to avoid damage

Apr 11, 2016 | Televison & Video

1 Answer

Vcr/tv how to get the carriage unstuck

It sounds as if the drive belt or wheel that controls the carriage has perished and failed. There is normally a micro switch on the side or rear of the tray, that senses the presents of a casset. If it is closed with stikky tape or clay you may be able to simulate a casset in the machine and with manual force help the casset to open or close. alternatively a small lamp in the centre of the tray senses the tape. then you have to cover the lamp or two sensors on left and right side of the tray, to prevent detection of the broken or missing tape.

Nov 15, 2015 | Televison & Video

1 Answer

Vcr hi-fi light blinking

You just have a dirty main video head. You can get a head cleaner tape or you can buy a tin of Servisol Video 40.
To clean with the Servisol, remove the top cover of the VCR. You will see a big shiny video head. Spray that head with the cleaner. You can also wipe it over with a cotton bud if it is very dirty. It's a good idea to clean all the surfaces that the video tape touches. If you don't know which, when you first take off the cover with the VCR on power, put a video tape in a press play then watch where the tape runs. Eject the tape, then clean with the spray and a cotton bud. You can even spray the cotton bud and then clean with that if you are not happy just spraying into the unit.
Make certain that the sprayed areas are dry before trying a video. It dries very quick anyway.

Jan 29, 2014 | Panasonic Pv-7451 Omnivision Vhs Vcr W/...

1 Answer

Panasonic 13" TV VCR Combo Unit White PV-C1332W put tape in and plays sound but just static shows on all movies?

You need to clean the video head. With these types of sets it's best to use a tape cleaning cassette. I should get a Scotch Head Cleaner Plus tape currently on sale on Amazon for around 4 pounds.

Nov 22, 2012 | Panasonic PV-C1332W 13 in. TV/VCR Combo

1 Answer

Ag7750 stuck in still error 5

Transport mechanism problem if tape will not ff/rewind----possible drive belts or the direct drive idler wheel that moves the tape.

Oct 31, 2012 | Televison & Video

1 Answer

The DVD works fine but the VCR doesn't play, rewind or forward tape.

l would have a look inside to see if when a tape is inserted it loads and will ff and rew, if the transport that moves the tape has failed it will account for what is happening.

Aug 27, 2012 | Zenith XBV442 DVD Player/VCR

1 Answer

Hi I am having a LG VCR GC980W 6 heads HiFi model. There is a bad picture and sound in some cassetes while playing while in another video the same cassetes works fine. I wonder whether it can be belt...

This is adirect drive type and the poor picture quality has nothing to do with the belt.
The fault can be due to
1. fault head- since this is a Hi-Fi type , it is 6 head type. try cleaning the head to confirm, use a clean cassette.
2. Problems in the head amplifier circuit.
3. Check the RF connection to TV.
4. Clean the audio head and use a ordinary cassette to confirm the sound. Also try with a Hi Fi cassette.

If not the head is a suspect.

Sep 13, 2011 | Televison & Video

1 Answer

The sound on my Panasonic pv-4611 fades in and out while watching tapes. Doesn't matter whether they are factory or recorded ones by myself. Why?

This sounds like the Hi-Fi sound dropping out. It's mostly caused by dirt on the main video head. You need to clean it with either Servisol Video 40 or a head cleaning tape.

Oct 01, 2010 | Panasonic PV-V4611 VHS VCR

Not finding what you are looking for?

Open Questions:

See all Panasonic PV-7451 VHS VCR Questions

Televison & Video Logo

285 people viewed this question

Ask a Question

Usually answered in minutes!

Top Panasonic Televison & Video Experts


Level 3 Expert

5650 Answers


Level 3 Expert

509 Answers

The Knight
The Knight

Level 3 Expert

76016 Answers

Are you a Panasonic Televison and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides