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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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Portable CD player problem
Hi all,
I have a problem with my Sharp portable CD player / radio. All my CD's are skipping. I've cleaned the lens but I think it's probably a motor / mechanical problem. When I play a disc a track will play for a few moments and then the disc will stop spinning and come back to life again. I think its probably had it. I was just wondering if anybody knows what the life of a portable CD player actually is? I listen to CD's on this player when i'm working in the office. I've played it constantly every other week for over 2 years. I reckon its played over 2000 hours of music. Is it worth buying a lens cleaner or is it most likely mechanical? |
#2
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The laser in the pickup head is probably weak from use. This is common. It
is time to get a new CD player. Servicing would be too expensive. -- Jerry G. ====== "M Jones" NOSPAMmjonesREMOVETHISANDNOSPAM@NOSPAMwestwardser vices.com wrote in message ... Hi all, I have a problem with my Sharp portable CD player / radio. All my CD's are skipping. I've cleaned the lens but I think it's probably a motor / mechanical problem. When I play a disc a track will play for a few moments and then the disc will stop spinning and come back to life again. I think its probably had it. I was just wondering if anybody knows what the life of a portable CD player actually is? I listen to CD's on this player when i'm working in the office. I've played it constantly every other week for over 2 years. I reckon its played over 2000 hours of music. Is it worth buying a lens cleaner or is it most likely mechanical? |
#3
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Hi,
The laser output power may fade - 2000 hours should be no problem. What I would expect is that the spinning up from 1x to overspeed may have some side effects. Does this effect occur with shock protection on / off - maybe it still works without shockprotection (= 1x speed - no spinup). The spinup problem might come from worse readability / to less laserpower - or too much powerconsumption from the turntable motor - worn bearing - defect motor brushes. The increased powerconsumption can influence the output stages of the actuators ... 1) Is the effect different with esp on/off ? 2) The only thing additional to cleaning is to change the output power calibration of the pickup. A potentiometer at the pickup calibrates the feedback signal from the monitor diode. This potentiometer is normally from laserdiode to ground - weakening the feedback signal. By slightly reducing its resistance - the aging / power fade can be compensated. - for some time - if its a marginal effect - a subtle change would help a lot. Before manipulation - I would do check if problems appear with all types of disc CD,CDR,CDRW - problems with CDRW are a good indication for faded laser. Wolfgang "M Jones" NOSPAMmjonesREMOVETHISANDNOSPAM@NOSPAMwestwardser vices.com schrieb im Newsbeitrag ... Hi all, I have a problem with my Sharp portable CD player / radio. All my CD's are skipping. I've cleaned the lens but I think it's probably a motor / mechanical problem. When I play a disc a track will play for a few moments and then the disc will stop spinning and come back to life again. I think its probably had it. I was just wondering if anybody knows what the life of a portable CD player actually is? I listen to CD's on this player when i'm working in the office. I've played it constantly every other week for over 2 years. I reckon its played over 2000 hours of music. Is it worth buying a lens cleaner or is it most likely mechanical? |
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