I am looking for a laser pickup assembly part number KCP 5H for a Teac PDH 503 cd player. I am told by Teac that the laser was manufactured by Kenwood, but is no longer available from the UK distributor.
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How long have you had you CD recorder?
How many CDs have you burned on it?
The reason for asking is, it sounds like the laser has
failed or is failing to the point of not recognizing the
presence of a disc in the tray. Does it do this with any
disc you put in the tray. Blanks & pre recorded CDs?
A minimum amount of light must bounce back from the
surface of the disc or the unit thinks the tray is empty.
If the laser has become very weak (or died) the player
doen't know any better and thinks "no disc".
The "reading" message just indicates it hasn't passed
the stage where it has detected a disc, yet.
The first step is to run a laser cleaning disc in the player
on the off-chance the lens is dusty and that's the problem.
If you don't have one (you should) they're cheap enough
and available everywhere. If cleaning doesn't help, you
will be looking for a new laser assembly for your unit.
Be careful how much you pay for one. New 890s can be
had from Full Compass for under $200.00 and would be
a smarter move than repairing a tired one!
Could be simply a dusty laser lens. Try a cleaning CD first.
After that, it could be that the laser assembly has low power output. Some decks have the range to increase the laser power, but it's only a temporary fix. The emissions are dying so the laser assembly will need to be replaced sooner of later.
It is a job for a Technician and there are no user serviceable parts inside a unit like this- people usually wreck the units as they are delicate. The Laser pickup does not often times go bad that easily and that is just a persons way of sounding like they know what they are talking about but without substantial proof I do not just take that as fact. Many many other things can cause a malfunction other than the laser- it can be a nad spindle motor, platter distance can be wrong and can even be dust on he lense. I have working Sony decks here from 1987- these are the original pickups- same kind you have I bet.
HelloDisc reading is done by the laser pickup assembly. If it has some trouble with it, the lead-in and lead-out signals and other music signals cannot be read from the CD disc we insert into. There are mainly three reasons for this fault. The first one is with dirty laser pickup assembley focussing lens. If the lens has accumulated with dirt or dust, the intensity or laser beam that hits the disc will be weak, and so the reflected beame too. This will lead improper reading of the lead-in signals, and the set will show no-disc after a while. Put a laser head cleaning disc [this disc can be bought from most of the electronic sparepart shops at your town], play it for at least three times, and see whether it helps you.If not, try replacing the flat ribbon plastic cable that connects the laser head assembly to the main board of the player. Actually this is a very skilled work, as you have to dismanle the mechanism out from the set. If these two processes does not help you, repalce the laser pickup assembely with same type and number. OK.
HelloThe laser pickup unit [Lens assembly] has the trouble. Either it may be damaged, or accumulated dust particles obstruct the laser beam. Just put in a cleaning disc [this disc can be bought from most of the electronics spare part shops at your town], play it for at least three times. If the fault is due to dirt and dust, this process of cleaning will help you. If not. replace the flat ribbon plastic cable, that connects the laser head assembly to the main board. This cable has carbon tracks, instead of metal wire conductors in it. These tracks are likely to get break, during time, because, this wire have to travel along with the laser head assembly, while it tracks the CD. In most cases, the above said two processes will rectify the problem. If these does not help you, you have to replace the laser head assembly with same type and number. Insist on same type and number, as audio CD player laser assemblys have special chareteristics. OK.
The Laser Pickup Assembly is the problem, usually caused by a weak laser pickup or a defective pladder motor that spins the cd's, one possible solution is clean the laser pickup lens with a Q-Tip and rubbing alcohol, if this fails the entire assembly must be replaced or buy new the cheaper option.
Generally something that is time related with a CD player indicates that there is something stuck in one of the gear teeth that drive the laser back and forth to play different areas of the disc. A very small piece of dirt/sand can get inside and stuck in a gear tooth preventing the laser from moving past that point on the CD, in your case it's about the 40 minute mark........you can try skipping to say the last song on the CD which will advance the laser unit a bit more quickly than if you were to let the disc play through, that might dislodge the piece. Another scenario could be a cracked gear in the same drive area. This is not as likely as you say it plays for 40 minutes or so. There is a piece that is attached to the laser which has gear teeth in it that mesh with the gears that move it, I'd suspect it's in there. Make sure you do not have the player plugged in when you open it, the laser is capable of damaging your eyes.
Do you intend to replace the laser pickup yourself. If you are going to replace the laser yourself, you will need to take a look at the laser pickup and specify the number writen on it . Normally the number will start with the alphabets KSS___ .
If you give me the number, i can let you know if there is stock which can be shipped to you