CD drive

Overview

Supports speeds of 1x and 2x and can switch between them.

Electronics

The CD subsystem of a first generation PU-7-based PlayStation consists of the following hardware components:

• DSP
• Controller (with 32 KB of external RAM)
• Sub-CPU/Mecha-Con
• Servo controller/RF-amp
• BTL-Driver

Over the years, these components have been consolidated into fewer, more complex ICs.

Models (mechanism)

• KSM-440AAM
  • Compatible with PU-7, PU-8 and PU-16 boards
  • Can in theory be mounted on PM-41 boards after replacing the top plastic shield, but the cable doesn't have the reinforcement/pull-tab for the non-ZIF connector of PM-41
• KSM-440ABM
  • Compatible with PU-7, PU-8 and PU-16 boards
  • Can in theory be mounted on PM-41 boards after replacing the top plastic shield, but the cable doesn't have the reinforcement/pull-tab for the non-ZIF connector of PM-41
• KSM-440ACM
  • Compatible with PU-7, PU-8 and PU-16 boards
  • Can in theory be mounted on PM-41 boards after replacing the top plastic shield, but the cable doesn't have the reinforcement/pull-tab for the non-ZIF connector of PM-41
• KSM-440ADM
  • Compatible with PU-18 and PU-20 boards
  • Has a plastic shield at the bottom to prevent the long cable running under the mechanism from getting jammed in it
• KSM-440AEM
  • Compatible with PU-22 and PU-23 boards
• KSM-440BAM
  • Compatible with PM-41 boards (PlayStation One)
  • Can be mounted on PU-7/PU-8/PU-16 boards after replacing the top plastic shield (these boards have a ZIF-connector, but installation works fine nonetheless)