Having aquired a dead cd67 [thanks mate!] ....I took a guess that it was the laser that had expired. On the side of the laser assembly you can read the philips part number and the generic part number cdm12.1/15 I huntede round the web and found 'dalbani' who were not very forthcoming with info but were easily the cheapest at about £23 inc p&p. The Unit arrived the next day. To get at the optical pick in this unit you undo the three screws holding the draw to the chassis, by part extending the draw and a little inginuity you can remove the mechanism from the player. You need to click off the front of the draw too. The pickup is attached to the draw via rubberry suspension gromits and six hair like wires. The best thing is to take a digital hoto of the wire positions and the unthread them. Then desolder the from the old unit. I could not decide if I should resolder before mounting the optical pickup or after, in the end I mounted the unit first. This is a pig ......as the gromits are soft and do not want to go back in the holes of either the pickup or the draw frame....I fitted them to the pickup first .....an hour latter I had the unit fitted to the draw [ I'll not desricbe the skinned fingers or the cursing as the last gromit pops out whilst your fixing the next !] The wires are then resoldered with the quickest of touches from the hot iron .....and I failed to melt any of the plastic frame to! revese the process of removing the draw mech and fix ...not easy as the gaps are small you need a widget on the end of your screw driver to hold the screw...I don't have one ! The moment of truth ...drop a disk in, press play and viola it reads the disc and starts to play ! I've no idea if the pickup affects the sound .....or if you can get better pickups ..but the unit sounds typically marantz .... The question is do I sell it or do I us it as mod test bed........ Actually thats not a bad idea .......