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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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Replace DVD loader in Samsung HT-DS400
The HT-DS400 Home Theatre system from Samsung is about a decade old.
The DVD loader that is part of it has become unreliable, rejecting as "No Disc" all manner of decent items. It never was a great loader, and now it is sadly diminished. I see on ebay that I can purchase for around $40 (including postage) an exact replacement, part number AH59- 01354A, but I am wondering if something that starts out as more competent (and maybe cheaper) could fit in the same spot? Failing that, might it help to clean the optics or lubricate anywhere? The inside of the case is amazingly clear of dust, considering the unit's age. If that goes well, I would replace the fan with a more modern, silent fan, and end up with a machine worth maybe $50. A labour of love? Thanks to all. RIP |
#2
Posted to sci.electronics.repair
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Replace DVD loader in Samsung HT-DS400
"Reginald I. Perrin" wrote in message .. . The HT-DS400 Home Theatre system from Samsung is about a decade old. The DVD loader that is part of it has become unreliable, rejecting as "No Disc" all manner of decent items. It never was a great loader, and now it is sadly diminished. I see on ebay that I can purchase for around $40 (including postage) an exact replacement, part number AH59- 01354A, but I am wondering if something that starts out as more competent (and maybe cheaper) could fit in the same spot? Failing that, might it help to clean the optics or lubricate anywhere? The inside of the case is amazingly clear of dust, considering the unit's age. If that goes well, I would replace the fan with a more modern, silent fan, and end up with a machine worth maybe $50. A labour of love? Thanks to all. RIP Firstly, cleaning is unlikely to get you anywhere, unless a DVD player has been sitting idle for a couple of years, or lives in a heavy-smoker house. The reason for this is that, unlike a CD player, a DVD disc rotates at extremely high speed. This causes the underside of the disc to drag a layer of air around with it, which normally keeps the laser lens spotlessly clean. Assuming that this is a fully integrated drive similar to a computer one, on attempting to replace it with an 'alternative', I would advise against it. The drive on many players is an OEM part, and their system control looks for a digital 'signature' from it. If the existing one has managed to keep going for 10 years, I would consider that a result. Many DVD lasers struggle to do a third of that before they can no longer read discs. As to replacing the fan, you should be ok, but make sure that you pick one with as near the same voltage and current specs as you can find, as some machines control the fan's speed depending on the audio output heatsink temperature, and some monitor the current to make sure that the fan hasn't failed. Still others employ a three-wire fan, and look at the tacho output to make sure that it's going round. Arfa |
#3
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Replace DVD loader in Samsung HT-DS400
"Arfa Daily" wrote in
: "Reginald I. Perrin" wrote in message .. . The HT-DS400 Home Theatre system from Samsung is about a decade old. The DVD loader that is part of it has become unreliable, rejecting as "No Disc" all manner of decent items. It never was a great loader, and now it is sadly diminished. I see on ebay that I can purchase for around $40 (including postage) an exact replacement, part number AH59- 01354A, but I am wondering if something that starts out as more competent (and maybe cheaper) could fit in the same spot? Failing that, might it help to clean the optics or lubricate anywhere? The inside of the case is amazingly clear of dust, considering the unit's age. If that goes well, I would replace the fan with a more modern, silent fan, and end up with a machine worth maybe $50. A labour of love? Thanks to all. RIP Firstly, cleaning is unlikely to get you anywhere, unless a DVD player has been sitting idle for a couple of years, or lives in a heavy-smoker house. The reason for this is that, unlike a CD player, a DVD disc rotates at extremely high speed. This causes the underside of the disc to drag a layer of air around with it, which normally keeps the laser lens spotlessly clean. Assuming that this is a fully integrated drive similar to a computer one, on attempting to replace it with an 'alternative', I would advise against it. The drive on many players is an OEM part, and their system control looks for a digital 'signature' from it. If the existing one has managed to keep going for 10 years, I would consider that a result. Many DVD lasers struggle to do a third of that before they can no longer read discs. As to replacing the fan, you should be ok, but make sure that you pick one with as near the same voltage and current specs as you can find, as some machines control the fan's speed depending on the audio output heatsink temperature, and some monitor the current to make sure that the fan hasn't failed. Still others employ a three-wire fan, and look at the tacho output to make sure that it's going round. Arfa Thank you, Arfa. I guess I should leave well enough alone, though in its current state the Home Theatre is close to binnable. The DVD loader is not at all like a computer disc unit, which is a well-labelled metal box you slide in and then attach power and data connectors. The Home Theatre DVD loader is an "assembly" with few or no manufacturer markings. Ribbon cables connect the assembly with other circuit boards, so it is difficult to tell where the "assembly" ends and the rest of the "home theatre" begins, unlike the situation with a computer optical deck. I was hoping that someone with experience with Samsung products / home theatres might be able to tell me if there was a chance of success by, for example, transplanting the DVD from a Samsung DVD player I might find at a thrift store. I know it is a long shot. RIP |
#4
Posted to sci.electronics.repair
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Replace DVD loader in Samsung HT-DS400
"Reginald I. Perrin" wrote in message .. . "Arfa Daily" wrote in : "Reginald I. Perrin" wrote in message .. . The HT-DS400 Home Theatre system from Samsung is about a decade old. The DVD loader that is part of it has become unreliable, rejecting as "No Disc" all manner of decent items. It never was a great loader, and now it is sadly diminished. I see on ebay that I can purchase for around $40 (including postage) an exact replacement, part number AH59- 01354A, but I am wondering if something that starts out as more competent (and maybe cheaper) could fit in the same spot? Failing that, might it help to clean the optics or lubricate anywhere? The inside of the case is amazingly clear of dust, considering the unit's age. If that goes well, I would replace the fan with a more modern, silent fan, and end up with a machine worth maybe $50. A labour of love? Thanks to all. RIP Firstly, cleaning is unlikely to get you anywhere, unless a DVD player has been sitting idle for a couple of years, or lives in a heavy-smoker house. The reason for this is that, unlike a CD player, a DVD disc rotates at extremely high speed. This causes the underside of the disc to drag a layer of air around with it, which normally keeps the laser lens spotlessly clean. Assuming that this is a fully integrated drive similar to a computer one, on attempting to replace it with an 'alternative', I would advise against it. The drive on many players is an OEM part, and their system control looks for a digital 'signature' from it. If the existing one has managed to keep going for 10 years, I would consider that a result. Many DVD lasers struggle to do a third of that before they can no longer read discs. As to replacing the fan, you should be ok, but make sure that you pick one with as near the same voltage and current specs as you can find, as some machines control the fan's speed depending on the audio output heatsink temperature, and some monitor the current to make sure that the fan hasn't failed. Still others employ a three-wire fan, and look at the tacho output to make sure that it's going round. Arfa Thank you, Arfa. I guess I should leave well enough alone, though in its current state the Home Theatre is close to binnable. The DVD loader is not at all like a computer disc unit, which is a well-labelled metal box you slide in and then attach power and data connectors. The Home Theatre DVD loader is an "assembly" with few or no manufacturer markings. Ribbon cables connect the assembly with other circuit boards, so it is difficult to tell where the "assembly" ends and the rest of the "home theatre" begins, unlike the situation with a computer optical deck. I was hoping that someone with experience with Samsung products / home theatres might be able to tell me if there was a chance of success by, for example, transplanting the DVD from a Samsung DVD player I might find at a thrift store. I know it is a long shot. RIP Many DVD players use mechs that are basically a computer type, though often without the outer metalwork, which then makes them less identifiable as being such. The assembly that you were looking at on eBay is probably what is known as a sub-deck. Usually, this comprises the metal deck, the laser mounted and aligned (although some aren't, Panasonic / Technics being a notable example), the sled motor and drive gears, and the spindle motor with pre-aligned turntable. With some players, replacement is just a drop-in operation with one ribbon cable and one or two 'normal' cables to be connected. On others, when the deck is installed, mechanical adjustments have to be made. On the Pan, this involves invoking some inbuilt software that measures jitter, and then juggling three very awkwardly located screws to minimise the jitter factor. On others - any of the Sony HCD-Sxxx series for instance - a built in automatic alignment routine has to be invoked to map the new laser's parameters, and apply corrections and offsets for any factors that are less than optimal. I think it is fairly unlikely that you would find a 'straight' DVD player with exactly the same deck in it. In my experience manufacturers tend to use several different assemblies across their ranges of HCs and basic players. Just to fool you, they can often look exactly the same, but you then find that screw holes are differently located, or the connectors are slightly different. Your best bet would be to hunt down a copy of the service manual, which will have a section on replacing the laser. On some makes and models, it's a five minute job, on others a long-winded nightmare. FWIW, Sammys are usually straightforward. That said though, without the knowledge of what exactly is required to be done on that specific player, you could well end up just ****ing in the wind ... Arfa |
#5
Posted to sci.electronics.repair
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Replace DVD loader in Samsung HT-DS400
"Arfa Daily" wrote in
: "Reginald I. Perrin" wrote in message .. . "Arfa Daily" wrote in : "Reginald I. Perrin" wrote in message .. . The HT-DS400 Home Theatre system from Samsung is about a decade old. The DVD loader that is part of it has become unreliable, rejecting as "No Disc" all manner of decent items. It never was a great loader, and now it is sadly diminished. I see on ebay that I can purchase for around $40 (including postage) an exact replacement, part number AH59- 01354A, but I am wondering if something that starts out as more competent (and maybe cheaper) could fit in the same spot? Failing that, might it help to clean the optics or lubricate anywhere? The inside of the case is amazingly clear of dust, considering the unit's age. If that goes well, I would replace the fan with a more modern, silent fan, and end up with a machine worth maybe $50. A labour of love? Thanks to all. RIP Firstly, cleaning is unlikely to get you anywhere, unless a DVD player has been sitting idle for a couple of years, or lives in a heavy-smoker house. The reason for this is that, unlike a CD player, a DVD disc rotates at extremely high speed. This causes the underside of the disc to drag a layer of air around with it, which normally keeps the laser lens spotlessly clean. Assuming that this is a fully integrated drive similar to a computer one, on attempting to replace it with an 'alternative', I would advise against it. The drive on many players is an OEM part, and their system control looks for a digital 'signature' from it. If the existing one has managed to keep going for 10 years, I would consider that a result. Many DVD lasers struggle to do a third of that before they can no longer read discs. As to replacing the fan, you should be ok, but make sure that you pick one with as near the same voltage and current specs as you can find, as some machines control the fan's speed depending on the audio output heatsink temperature, and some monitor the current to make sure that the fan hasn't failed. Still others employ a three-wire fan, and look at the tacho output to make sure that it's going round. Arfa Thank you, Arfa. I guess I should leave well enough alone, though in its current state the Home Theatre is close to binnable. The DVD loader is not at all like a computer disc unit, which is a well-labelled metal box you slide in and then attach power and data connectors. The Home Theatre DVD loader is an "assembly" with few or no manufacturer markings. Ribbon cables connect the assembly with other circuit boards, so it is difficult to tell where the "assembly" ends and the rest of the "home theatre" begins, unlike the situation with a computer optical deck. I was hoping that someone with experience with Samsung products / home theatres might be able to tell me if there was a chance of success by, for example, transplanting the DVD from a Samsung DVD player I might find at a thrift store. I know it is a long shot. RIP Many DVD players use mechs that are basically a computer type, though often without the outer metalwork, which then makes them less identifiable as being such. The assembly that you were looking at on eBay is probably what is known as a sub-deck. Usually, this comprises the metal deck, the laser mounted and aligned (although some aren't, Panasonic / Technics being a notable example), the sled motor and drive gears, and the spindle motor with pre-aligned turntable. With some players, replacement is just a drop-in operation with one ribbon cable and one or two 'normal' cables to be connected. On others, when the deck is installed, mechanical adjustments have to be made. On the Pan, this involves invoking some inbuilt software that measures jitter, and then juggling three very awkwardly located screws to minimise the jitter factor. On others - any of the Sony HCD-Sxxx series for instance - a built in automatic alignment routine has to be invoked to map the new laser's parameters, and apply corrections and offsets for any factors that are less than optimal. I think it is fairly unlikely that you would find a 'straight' DVD player with exactly the same deck in it. In my experience manufacturers tend to use several different assemblies across their ranges of HCs and basic players. Just to fool you, they can often look exactly the same, but you then find that screw holes are differently located, or the connectors are slightly different. Your best bet would be to hunt down a copy of the service manual, which will have a section on replacing the laser. On some makes and models, it's a five minute job, on others a long-winded nightmare. FWIW, Sammys are usually straightforward. That said though, without the knowledge of what exactly is required to be done on that specific player, you could well end up just ****ing in the wind ... Arfa FWIW, here is the ad for the replacement (nature of ebay is that auctions expire, so anybody looking at this after a few days will find a broken link): http://www.ebay.ca/itm/BRAND-NEW-SAM...H59-01354A-HT- DS400-/180873273722#ht_2416wt_691 I was not able to find a Samsung HT DS-400 repair manual. So it looks like the extent of the repairs I will attempt is a quieter fan. |
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