CDVD Drive

Overview

The drive is known as MD-block in internal Sony documentation.

Mechanics

Slide/spindle/laser assemblies

• KHM-430BAA
  • M-chassis
  • KHM-430C laser

Laser

Notes

• KHS-400R seems to be a rebadged Sanyo SF-HD7 with a different plastic cap to remove the "HD7" labelling present on the SF-HD7; they are completely drop-in interchangeable
• KHS-400B and KHS-400C are electrically compatible, but differ in thickness of the base, making them mechanically incompatible (putting a KHS-400C in place of a KHS-400B will seem to work at first, but the flex cable will bend heavily once the laser reaches the outer area while moving)
• KHS-400C and KHS-400R / SF-HD7 are mechanically fully compatible, but require different calibration data for MechaCon
• There are 2 different lens assemblies for KHS-400B, which require different calibration data for MechaCon: T487 (white ring around lens) and T609K (yellow ring around lens). Some early T609K have a white ring around the lens. These lasers have a violet marking at the adjustment screw.
• KHS-400B (with T487 lens assembly) can fully drop-in replace KHS-400A, but not vice versa (mechanical reasons). KHS-400B with T609K lens assembly can also be used, but requires different calibration data for MechaCon.
• PSX consoles always have 2 laser assemblies: One KHS-400C (for PS2 games only) and KWS-200A (XPD-001 motherboard) or SF-DB11 (XPD-005 motherboard). Every disc will first be detected by the KWS-200A / SF-DB11, so if this laser is broken, the console also won't read PS2 games, since the KHS-400C only becomes active once a PS2 game has been detected
• The drive mechanisms of earlier and later PSX consoles are completely different (except the KHS-400C), so you can't replace a KWS-200A with a SF-DB11 (same goes for vice versa)
• PVR-802W and KHM-430 seem to be mostly identical; KHM-430 is probably a rebadged PVR-802W, as with KHS-400R / SF-HD7

Laser types

Sony

• KHS-400A
• KHS-400B
  • with T487 lens assembly
  • with T609K lens assembly
• KHS-400C
• KHS-400R
• KWS-200A (DVR/DVD-burning laser in earlier PSX consoles)
• KHM-430
• KHM-430C

Sanyo

• SF-HD7
• SF-DB11 (DVR/DVD-burning laser in later PSX consoles)

Mitsumi

• PVR-702W (used in J-chassis SCPH-5000X fat PS2)
• PVR-802W Datasheet

NEC (?)

• SPU-3170

third party replacements/clones

• KHS-400W (replaces KHS-400C)
• KHS-400H (replaces KHS-400R and SF-HD7)