newbie hi fi repair... laser pick up callibration

[gandh1]

Hi there,

I have a nothing special aiwa hifi:

retail code - nsx-22
model code - cx-ns22k
serial code - s01w7c10367

which i got ages ago and cd player stopped recognising cds soon after the warranty ran out. what happens is it takes the cd in it spins it 3 times, and then gives up and tries another cd (3cd drawer)

anyway at that time i was moving over to mp3 cd-rs anyway so bought a new stereo, but recently ive taken on a workshop to complete in-house domestic appliance repairs and thought id have a bash at fixing this to use for my music as opposed to shelling out for a new stereo.

so yes, even after one of those cheap and nasty cd lens cleaners, it still wont recognise a cd. after doing a bit of research and poking about with it ive noted the laser to be a kss213b. i also noted theres supposed to be an adjustment screw fitted to align the laser, i dont know where this is and is this likely to be viable or is the laser knackered? has anyone any tips or info on recalibrating it, or should i just screw and hope? Also if i need to replace it hows the best way to attempt it?

[Mooly]

There are NO adjustments needed on the pickup. The small preset is factory set to calibrate laser power... do NOT alter.
New pickups do have a small "shorting link" which is a little blob of solder that should be removed when fitted... with a static free low leakage soldering iron (one that is grounded).

There are adjustments on the main PCB but in 95% of times the pickup will work perfectly well without any adjustment to these.

Fitting is easy... just remove the rail and lift out. Spindle motors also wear and can cause problems.