If I wish to spend mony on it , I would have done that ...
Maybe someone has a PDF- file of it ?
"Alex" firstname.lastname@example.org> schreef in bericht
How about telling us whats wrong with the unit, it might be a well known
fault. Theres plenty of people in this NG who have repaired many Pioneer
cd players who could also assist as well. I have seen relatively little go
Pioneer home cd stackers as far as the circuitry is concerned, its quite
been a case of a problem with the optical pickup/worn spindle motor or some
mechanical problem (just gen servicing) or maybe a mechanical alignment
so the skipping happens straight away? or only when the volume is raised
and some vibration is introduced to the unit?
did you check the laser lens closely for dust? (dont do this with the unit
I need to know If you have checked the things I suggested In my last email.
if you do find the laser lens to be dirty, **dont** clean it with any
solvent or water. U can clean
it with a clean, dry cotton swab, or u can use a pure alcohol based liquid
such as isopropyl alcohol if it is really bad.
disconnect the unit from the mains, you will notice a sled gear (this
of the laser pickup from the inner most area to the outter edge during
try and move it by hand and see how freely it moves. Of course, the other
is to place the unit in test mode and using the track up/down keys observe
Theres a couple of ways to check the spindle motor. One is to disconnect it
from the servo, connect it to a 1.5v power supply and hook up a meter
in series and watch how much current is being drawn. If you find it drawing
more than 600ma, time for a new motor. Although this method will not
reveal a noisy motor, which can cause skipping too. With the unit turned off
give the motor a quick flick in the clockwise direction. If it doesnt spin
or sounds noisy, the motor is worn. U can try a very small drop of light oil
into the shaft of the motor and see if this frees it up.be careful doing
skipping is not normal behaviour. component deterioration after an extended
period of use IS normal :) The repair cost could go either way actually.
If it is only a spindle motor that has to be replaced or a plastic gear, it
be quite cheap to fix. Should the laser pickup be faulty, this can get
You would have to find out for your friend how much he is willing to spend
the entire laser assembly does not have to be replaced, individual
are usually available.
The unit should be able to handle some degree of vibration. This could
be signs of a weak laser or a worn spindle motor.If you want to check
the lasers strength, you're going to need some specialised equipment
and tools. One would be an oscilloscope, and a test disc that conforms
to a special standard. Using these tools, u can place the unit in test mode
and check many things. One would be the RF amplitude of the laser.
In the service manual, they will give u a nominal peak to peak value
of the RF signal, this varies depending on the circuitry and of course, the
typical values are 800mV to 1.2v p-p
obviously if you check this and find the amplitude to be 200mV p-p.
the laser is weak and should be changed.
There are other things to check as well besides RF.
You must be prepared to do this if you want to check everything yourself.
or you can take a blind guess and change the laser.
I suggest checking what i said earlier in this email and in my last email,
and posting the results..