If your laser dies on the CDX-1110 or a CDX-1120, you are $ht out of luck. I also do not believe that my ears could hear the difference between 2 or 4 BB chips.
Yamaha used the laser head and the same DAC chip in the CDX-1100 and CDX-10000...so it ain't bad.
Now I will let you in a little secret:
If your laser dies in your CDX-1100, there are plenty of potential donors out there (for the head only)
CDX-500,700,900 all have the same laser head
yeah, to Dave's point, old CDPs are a PITA, but is not always the head that goes bad.
For example, the CDX-1100 has the Deaded Sony Glue DSG problem (all over the PSU)
I have two units and one is not working...I thought the laser was bad, but it is not..there must be something wrong with my compromised PSU...