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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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Oknyo DX-C390
This is a 6 CD player. I've had it for a few years. I like it because I
can control it through the amp's remote. Powers on okay. Carousel will not rotate and it will not attempt to read a cd. Before I open it up, does anyone have any ideas on what to look at first? |
#2
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Oknyo DX-C390
"vey" wrote in message ... This is a 6 CD player. I've had it for a few years. I like it because I can control it through the amp's remote. Powers on okay. Carousel will not rotate and it will not attempt to read a cd. Before I open it up, does anyone have any ideas on what to look at first? Problems in the power supply would be the first thing to check for. Possibly a missing rail ? Motor volts are often a separate regulated supply on players, and all motors (loading, spindle, sled) are usually fed off the same rail. You could try manually shifting the laser up its slides a bit, and then powering on. If laser homes, then probably not a power supply issue. If it stays where you pushed it to, then it may well be. Arfa |
#3
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Oknyo DX-C390
Arfa Daily wrote:
"vey" wrote in message ... This is a 6 CD player. I've had it for a few years. I like it because I can control it through the amp's remote. Powers on okay. Carousel will not rotate and it will not attempt to read a cd. Before I open it up, does anyone have any ideas on what to look at first? Problems in the power supply would be the first thing to check for. Possibly a missing rail ? Motor volts are often a separate regulated supply on players, and all motors (loading, spindle, sled) are usually fed off the same rail. You could try manually shifting the laser up its slides a bit, and then powering on. If laser homes, then probably not a power supply issue. If it stays where you pushed it to, then it may well be. Arfa Motors usually get gunky after a while too. Cleaning the motors out might help for a bit,until the commutator glazes over again. (usually the problem that I run across.) |
#4
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Oknyo DX-C390
PhattyMo wrote:
Arfa Daily wrote: "vey" wrote in message ... This is a 6 CD player. I've had it for a few years. I like it because I can control it through the amp's remote. Powers on okay. Carousel will not rotate and it will not attempt to read a cd. Before I open it up, does anyone have any ideas on what to look at first? Problems in the power supply would be the first thing to check for. Possibly a missing rail ? Motor volts are often a separate regulated supply on players, and all motors (loading, spindle, sled) are usually fed off the same rail. You could try manually shifting the laser up its slides a bit, and then powering on. If laser homes, then probably not a power supply issue. If it stays where you pushed it to, then it may well be. Arfa Motors usually get gunky after a while too. Cleaning the motors out might help for a bit,until the commutator glazes over again. (usually the problem that I run across.) Much easier than I thought. Opened the top, saw a ribbon cable connected to the top board, unplugged it, replugged it and it started working fine after that. |
#5
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Oknyo DX-C390
vey wrote:
PhattyMo wrote: Arfa Daily wrote: "vey" wrote in message ... This is a 6 CD player. I've had it for a few years. I like it because I can control it through the amp's remote. Powers on okay. Carousel will not rotate and it will not attempt to read a cd. Before I open it up, does anyone have any ideas on what to look at first? Problems in the power supply would be the first thing to check for. Possibly a missing rail ? Motor volts are often a separate regulated supply on players, and all motors (loading, spindle, sled) are usually fed off the same rail. You could try manually shifting the laser up its slides a bit, and then powering on. If laser homes, then probably not a power supply issue. If it stays where you pushed it to, then it may well be. Arfa Motors usually get gunky after a while too. Cleaning the motors out might help for a bit,until the commutator glazes over again. (usually the problem that I run across.) Much easier than I thought. Opened the top, saw a ribbon cable connected to the top board, unplugged it, replugged it and it started working fine after that. LOL! Nice.. I once fixed a friends Playstation that had Coke spilled on it.. simply by taking it apart,and putting it back together.Worked fine after that. *shrug* :-) |
#6
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Oknyo DX-C390
"PhattyMo" wrote in message ... vey wrote: PhattyMo wrote: Arfa Daily wrote: "vey" wrote in message ... This is a 6 CD player. I've had it for a few years. I like it because I can control it through the amp's remote. Powers on okay. Carousel will not rotate and it will not attempt to read a cd. Before I open it up, does anyone have any ideas on what to look at first? Problems in the power supply would be the first thing to check for. Possibly a missing rail ? Motor volts are often a separate regulated supply on players, and all motors (loading, spindle, sled) are usually fed off the same rail. You could try manually shifting the laser up its slides a bit, and then powering on. If laser homes, then probably not a power supply issue. If it stays where you pushed it to, then it may well be. Arfa Motors usually get gunky after a while too. Cleaning the motors out might help for a bit,until the commutator glazes over again. (usually the problem that I run across.) Much easier than I thought. Opened the top, saw a ribbon cable connected to the top board, unplugged it, replugged it and it started working fine after that. LOL! Nice.. I once fixed a friends Playstation that had Coke spilled on it.. simply by taking it apart,and putting it back together.Worked fine after that. *shrug* :-) Good when you get a nice simple one. I was in my friend's shop on Friday. He had just taken the back off an LCD TV/DVD combo. The DVD deck stood vertically inside the back with a slot that 'sucked' the disc in. The complaint was "DVD not working". Sure enough, it didn't take a disc off you. Following the wires back from the loading motor, they went to a small intermediate board at the side of the deck, that also had the disc sense switch on it. A small flexiprint went from here to the main board. When this was followed back, we found that it was in its socket at the far end, at an angle. When it was put back in properly, all of the motors sprang back to life, and it took a disc .... And that was it ! Nothing else. Zip. Nada. A bit of further poking about and examining, brought us to the flexiprint connected to the laser. Instead of this being inserted into the slotted opening of the ZIF connector on the laser, it had been carefully folded back on itself, and inserted into the gap between the plastic body of the connector, and its pcb connecting pins ! Putting this back correctly immediately caused the laser to light, and the disc to be read without issue. Your immediate thought is what the customer thought they were trying to fix, or whichever shady back street dealer they bought it off thought he was trying to do, but also, when I see this sort of 'fault', I can't help but think of the TV consumer 'trap' programmes, and trading standards offices, where they try to find and expose 'rogue' repairers who fix the simple wire-off problem, (which would never be a 'real' problem anyway) and then charge for a new laser. I once saw a programme where they popped a spring off a Philips charlie deck, causing it to jam up. The poor engineer concerned quoted for a repair kit to be fitted, as you would have on one of these that was jammed, and said that it would have to go back to the workshop to have it fitted. He was then immediately 'exposed' as a robber and charlatan, by a po-faced guy in a brown warehouseman's coat, who purported to be an 'expert'. I felt really sorry for the poor engineer, who struck me as an honest guy, who was just trying to do the best for his customer, and avoid a costly re-fail. For that reason, I am always a bit wary of the 'simple' ones these days ... Arfa |
#7
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Oknyo DX-C390
"vey" wrote in message ... PhattyMo wrote: Arfa Daily wrote: "vey" wrote in message ... This is a 6 CD player. I've had it for a few years. I like it because I can control it through the amp's remote. Powers on okay. Carousel will not rotate and it will not attempt to read a cd. Before I open it up, does anyone have any ideas on what to look at first? Problems in the power supply would be the first thing to check for. Possibly a missing rail ? Motor volts are often a separate regulated supply on players, and all motors (loading, spindle, sled) are usually fed off the same rail. You could try manually shifting the laser up its slides a bit, and then powering on. If laser homes, then probably not a power supply issue. If it stays where you pushed it to, then it may well be. Arfa Motors usually get gunky after a while too. Cleaning the motors out might help for a bit,until the commutator glazes over again. (usually the problem that I run across.) Much easier than I thought. Opened the top, saw a ribbon cable connected to the top board, unplugged it, replugged it and it started working fine after that. I suspect the failure will recur. We just don't ordinarily get this lucky. Mark Z. |
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