Post by thread:[EE]: DVD repair

Just a long shot. I have been given a Sanyo DVD-SL25 to repair. Picture etc. is perfect but there is no sound. I'm a bit suspicious that it has been disabled somehow as I do get some clicks etc when changing chapters. But no audio signal at all. Does anyone know how to access the service mode on this item (or possibly on any other recent Sanyo DVD player - may be similar). Or any other ideas that would cause loss of audio but good picture? I've tried all the relevant user settings so I'm now hoping for something in the service settings. Thanks, Richard P

Did they have the volume up and blow the speakers? Or output transistors. Some sets, when set for closed captioned mute the sound. Richard Prosser wrote: {Quote hidden}> Just a long shot. > I have been given a Sanyo DVD-SL25 to repair. Picture etc. is perfect > but there is no sound. I'm a bit suspicious that it has been disabled > somehow as I do get some clicks etc when changing chapters. But no > audio signal at all. > > Does anyone know how to access the service mode on this item (or > possibly on any other recent Sanyo DVD player - may be similar). > > Or any other ideas that would cause loss of audio but good picture? > I've tried all the relevant user settings so I'm now hoping for > something in the service settings. > > Thanks, > Richard P >

Hi Carl, No, this is just a player, the outputs are low level audio (2V) that drive a TV or separate audio system. I've played with the subtitle options on the user setup menu but no joy regardless of them being enabled or disabled. RP 2008/5/21 Carl Denk <spam_OUTcdenkTakeThisOuTalltel.net>: {Quote hidden}> Did they have the volume up and blow the speakers? Or output > transistors. Some sets, when set for closed captioned mute the sound. > > Richard Prosser wrote: >> Just a long shot. >> I have been given a Sanyo DVD-SL25 to repair. Picture etc. is perfect >> but there is no sound. I'm a bit suspicious that it has been disabled >> somehow as I do get some clicks etc when changing chapters. But no >> audio signal at all. >> >> Does anyone know how to access the service mode on this item (or >> possibly on any other recent Sanyo DVD player - may be similar). >> >> Or any other ideas that would cause loss of audio but good picture? >> I've tried all the relevant user settings so I'm now hoping for >> something in the service settings. >> >> Thanks, >> Richard P >> > -

On Wed, 21 May 2008 11:44:15 +1200 "Richard Prosser" <.....rhprosserKILLspam@spam@gmail.com> wrote: > Or any other ideas that would cause loss of audio but good picture? > I've tried all the relevant user settings so I'm now hoping for > something in the service settings. I have really no idea - but I believe DVDs have several audio tracks, according to each country. Is there a setting to select the channel on the reproduces? Maybe it just got set to some weird language. Also, some DVD reproduces have up to 5 speakers - do you have them all checked? Aren't they switched? John

Hi John, I've tried different language options - the DVD I tried had english & german soundtracks - no joy on either. The on-screen menu appears to indicate that the output mode is set to "5.1" mode. But there's only the two RCA audio output connectors. (plus various video connections). There doesn't appear to be any way of changing from the 5.1 format which is what started me thinking about service mode options. The user manual describes "5.1" as "A kind of audio" and that's it! RP 2008/5/21 John Coppens <johnKILLspamjcoppens.com>: {Quote hidden}> On Wed, 21 May 2008 11:44:15 +1200 > "Richard Prosser" <.....rhprosserKILLspam.....gmail.com> wrote: > >> Or any other ideas that would cause loss of audio but good picture? >> I've tried all the relevant user settings so I'm now hoping for >> something in the service settings. > > I have really no idea - but I believe DVDs have several audio tracks, > according to each country. Is there a setting to select the channel on > the reproduces? Maybe it just got set to some weird language. > > Also, some DVD reproduces have up to 5 speakers - do you have them all > checked? Aren't they switched? > > John > -

Hi George I've just checked & iy's already set to LPCM mode. Changing it to Bitstream didn't help either for what it's worth! I'd think that the audio stage or its PS had died except for the slight blip in the speakers when I change chapters - presumably some sort of mute function. That would indicate that at least part of the audio chain is workin OK - but, since the video side of things is working fine I don't really imagine there's much going on between the decoder and the mute switch. I've just downloaded a service manual for a similar (I hope) model so that might give me a few clues. Richard On 21/05/2008, Geo <EraseMElintechspam_OUTTakeThisOuTblueyonder.co.uk> wrote: {Quote hidden}> On 21 May 2008, at 11:44, Richard Prosser wrote: > >> Or any other ideas that would cause loss of audio but good picture? >> I've tried all the relevant user settings > > 5.1 digital out comes out of the digital socket. > Try setup - digital out - and set to Dolby Digital: LPCM. > Not sure if when other digital modes in use the stereo phono output is > inhibited. > > > > George > > -

On Wed, 2008-05-21 at 13:54 +1200, Richard Prosser wrote: > Hi John, > I've tried different language options - the DVD I tried had english & > german soundtracks - no joy on either. > > The on-screen menu appears to indicate that the output mode is set to > "5.1" mode. But there's only the two RCA audio output connectors. > (plus various video connections). There doesn't appear to be any way > of changing from the 5.1 format which is what started me thinking > about service mode options. > > The user manual describes "5.1" as "A kind of audio" and that's it! Have you tried playing a CD? That'll eliminate pretty much all "DVD settings" questions. TTYL

2008/5/22 Herbert Graf <mailinglist4spam_OUTfarcite.net>: > On Wed, 2008-05-21 at 13:54 +1200, Richard Prosser wrote: >> Hi John, >> I've tried different language options - the DVD I tried had english & >> german soundtracks - no joy on either. >> >> The on-screen menu appears to indicate that the output mode is set to >> "5.1" mode. But there's only the two RCA audio output connectors. >> (plus various video connections). There doesn't appear to be any way >> of changing from the 5.1 format which is what started me thinking >> about service mode options. >> >> The user manual describes "5.1" as "A kind of audio" and that's it! > > Have you tried playing a CD? That'll eliminate pretty much all "DVD > settings" questions. > > TTYL > -- Thanks, good idea, I hadn't tried that. I'll have a go tonight. Richard

Richard Prosser wrote: > 2008/5/22 Herbert Graf <@spam@mailinglist4KILLspamfarcite.net>: > >>On Wed, 2008-05-21 at 13:54 +1200, Richard Prosser wrote: >> >>>Hi John, >>>I've tried different language options - the DVD I tried had english & >>>german soundtracks - no joy on either. >>> >>>The on-screen menu appears to indicate that the output mode is set to >>>"5.1" mode. But there's only the two RCA audio output connectors. There should also be an optical output and possible and RCA 'digital' port (often orange colored). >>>(plus various video connections). There doesn't appear to be any way >>>of changing from the 5.1 format which is what started me thinking >>>about service mode options. Not something that service mode would affect. >>> The user manual describes "5.1" as "A kind of audio" and that's it! >> >>Have you tried playing a CD? That'll eliminate pretty much all "DVD >>settings" questions. > > Thanks, good idea, I hadn't tried that. I'll have a go tonight. > > Richard Since you have audio mode set to 5.1, you will of course get NO ANALOG audio. PCM is also a digital mode. You need to turn off digital audio modes to get analog out on many DVD players. Is 'none' or 'off' an audio option? Also check that you are using 'main' audio, not 'alternate' or 'foreign'. The unit may have a volume function. If the volume is set to zero you will of course also get nothing out. It sounds to me like 'finger trouble' and that there is nothing wrong with the hardware. R

2008/5/22 Robert Rolf <KILLspamRobert.RolfKILLspamualberta.ca>: {Quote hidden}> Richard Prosser wrote: > >> 2008/5/22 Herbert Graf <RemoveMEmailinglist4TakeThisOuTfarcite.net>: >> >>>On Wed, 2008-05-21 at 13:54 +1200, Richard Prosser wrote: >>> >>>>Hi John, >>>>I've tried different language options - the DVD I tried had english & >>>>german soundtracks - no joy on either. >>>> >>>>The on-screen menu appears to indicate that the output mode is set to >>>>"5.1" mode. But there's only the two RCA audio output connectors. > > There should also be an optical output and possible and RCA 'digital' > port (often orange colored). > >>>>(plus various video connections). There doesn't appear to be any way >>>>of changing from the 5.1 format which is what started me thinking >>>>about service mode options. > > Not something that service mode would affect. > > >>>> The user manual describes "5.1" as "A kind of audio" and that's it! >>> >>>Have you tried playing a CD? That'll eliminate pretty much all "DVD >>>settings" questions. >> >> Thanks, good idea, I hadn't tried that. I'll have a go tonight. >> >> Richard > > Since you have audio mode set to 5.1, you will of course get > NO ANALOG audio. PCM is also a digital mode. > You need to turn off digital audio modes to get analog out > on many DVD players. Is 'none' or 'off' an audio option? > Also check that you are using 'main' audio, not 'alternate' or 'foreign'. > > The unit may have a volume function. If the volume > is set to zero you will of course also get nothing out. > > It sounds to me like 'finger trouble' and that there is nothing wrong > with the hardware. > > R > Hi Robert, Thanks for your ideas. I have been unable to find any way to turn the digital output off. The only options are LPCM at 48 or 96kbit/sec or bitstream (IIRC - I'm at work at the moment). Similarly for the main - alt - foreign settings, there's no sign of anything like that. But I could well have not yet found them. No volume control either I can find, but again, I'll look again tonight as there could be something I have yet to discover. Yes, my first impression was that it was finger trouble - but I'm rapidly starting to run out of fingers!! Thanks for the input everyone. Keep it coming. Richard P

OK, I've tried playing a CD - still no sound. No volume control to be located either. >From the service manual I have located (for a different model), it appears that there could be a separate DAC chip for the sound. Obviously a prime candidate for investigation. It'll have to wait until next week though. RP 2008/5/22 Richard Prosser <TakeThisOuTrhprosserEraseMEspam_OUTgmail.com>: {Quote hidden}> 2008/5/22 Robert Rolf <RemoveMERobert.RolfTakeThisOuTualberta.ca>: >> Richard Prosser wrote: >> >>> 2008/5/22 Herbert Graf <mailinglist4EraseME.....farcite.net>: >>> >>>>On Wed, 2008-05-21 at 13:54 +1200, Richard Prosser wrote: >>>> >>>>>Hi John, >>>>>I've tried different language options - the DVD I tried had english & >>>>>german soundtracks - no joy on either. >>>>> >>>>>The on-screen menu appears to indicate that the output mode is set to >>>>>"5.1" mode. But there's only the two RCA audio output connectors. >> >> There should also be an optical output and possible and RCA 'digital' >> port (often orange colored). >> >>>>>(plus various video connections). There doesn't appear to be any way >>>>>of changing from the 5.1 format which is what started me thinking >>>>>about service mode options. >> >> Not something that service mode would affect. >> >> >>>>> The user manual describes "5.1" as "A kind of audio" and that's it! >>>> >>>>Have you tried playing a CD? That'll eliminate pretty much all "DVD >>>>settings" questions. >>> >>> Thanks, good idea, I hadn't tried that. I'll have a go tonight. >>> >>> Richard >> >> Since you have audio mode set to 5.1, you will of course get >> NO ANALOG audio. PCM is also a digital mode. >> You need to turn off digital audio modes to get analog out >> on many DVD players. Is 'none' or 'off' an audio option? >> Also check that you are using 'main' audio, not 'alternate' or 'foreign'. >> >> The unit may have a volume function. If the volume >> is set to zero you will of course also get nothing out. >> >> It sounds to me like 'finger trouble' and that there is nothing wrong >> with the hardware. >> >> R >> > > Hi Robert, > Thanks for your ideas. > I have been unable to find any way to turn the digital output off. The > only options are LPCM at 48 or 96kbit/sec or bitstream (IIRC - I'm at > work at the moment). > > Similarly for the main - alt - foreign settings, there's no sign of > anything like that. But I could well have not yet found them. > No volume control either I can find, but again, I'll look again > tonight as there could be something I have yet to discover. > > Yes, my first impression was that it was finger trouble - but I'm > rapidly starting to run out of fingers!! > > Thanks for the input everyone. Keep it coming. > > Richard P >

2008/5/22 Ruben Jönsson <EraseMErubenpp.sbbs.se>: {Quote hidden}> > >> I've just downloaded a service manual for a similar (I hope) model so >> that might give me a few clues. >> >> Richard > > Hi, > > Just out of curiosity - where did you find the service manual? > > /Ruben > <http://www.rjjounal.net> > ============================== > Ruben Jönsson > AB Liros Electronic > Box 9124, 200 39 Malmö, Sweden > TEL INT +46 40142078 > FAX INT +46 40947388 > RemoveMErubenEraseMEEraseMEpp.sbbs.se > ============================== Hi Ruben http://www.eserviceinfo.com The DVD is a Sanyo DVD-SL25 and I found a DVD-SL33 service manual. It doesn't actually have much more than parts lists and schematics but it's a start. Someone has added pictures of undressed ladies to the background also so it's a bit distracting to try and sort out the details! Also it said I had to download multiple rar files ( 6 x 2Meg) but I just ended up with 6 copies of the same manual! RP

Just on the offchance anyone's interested. The latest I have on this is that the audio DAC appears to have all the signals going into it correctly (clocks, data control) but nothing coming out. The clocks have to be quite accurately related or the chip auto-mutes but since they are generated from the same source and appear to be OK (to 6 decimal places) I think it's unlikely to be a problem. So I'm trying to source a replacement WM8728 chip. Mouser have them listed at $US2.50 but estimate that courier charges to NZ will be $US40 !. And they'd be on backorder. Local parts suppliers don't seem to have it listed but I've still got a couple to try. I've located another player of the same type for sale cheap locally - but it appears to have the same problem. (If I can source the chips it might be a fixer-up-er). I've purchased a different type of DVD (dead) on the remote chance it uses the same chip but have yet to collect. Only cost $1 and includes a remote so should be useful for parts anyway. (Or may be fixable). Any other ideas? RP 2008/5/22 Richard Prosser <RemoveMErhprosserspam_OUTKILLspamgmail.com>: {Quote hidden}> 2008/5/22 Ruben Jönsson <RemoveMErubenTakeThisOuTspampp.sbbs.se>: >> >> >>> I've just downloaded a service manual for a similar (I hope) model so >>> that might give me a few clues. >>> >>> Richard >> >> Hi, >> >> Just out of curiosity - where did you find the service manual? >> >> /Ruben > > >> <http://www.rjjounal.net> >> ============================== >> Ruben Jönsson >> AB Liros Electronic >> Box 9124, 200 39 Malmö, Sweden >> TEL INT +46 40142078 >> FAX INT +46 40947388 >> EraseMErubenspamspamBeGonepp.sbbs.se >> ============================== > > Hi Ruben > > http://www.eserviceinfo.com The DVD is a Sanyo DVD-SL25 and I found a > DVD-SL33 service manual. It doesn't actually have much more than parts > lists and schematics but it's a start. Someone has added pictures of > undressed ladies to the background also so it's a bit distracting to > try and sort out the details! Also it said I had to download multiple > rar files ( 6 x 2Meg) but I just ended up with 6 copies of the same > manual! > > RP

Hi Alex, Thanks for that link. The part is certainly listed there - as you say, I'll have to get it translated. RP 2008/6/3 Alex Harford <harfordSTOPspamspam_OUTgmail.com>: > http://www.google.ca/search?q=WM8728+replacement > > There is a link to icminer.com which lists some compatible parts. Not > sure if they are a drop in replacement. You might want to use google > translate for the page, which is why I didn't give a direct link. > > On Mon, Jun 2, 2008 at 1:10 AM, Richard Prosser <spamBeGonerhprosserSTOPspamEraseMEgmail.com> wrote: >> >> Any other ideas? > -