Pioneer LD-V4300D Calibration – FTSB Module adjustment points

The FTSB Module is the main point of mechanical calibration in the player and is located on the underside of the player (accessible with the lower metal cover removed).

As the various calibration points are required for most of the calibration procedures, this section has been added seperately so it can be used as a guide when following the other calibration procedure descriptions.

FTSB Module mechanical calibration points

The following diagram shows the position of the mechanical calibration variable resistors on the FTSB module:

FTSB Module calibration points

The following picture is the same diagram as above but inverted and in greyscale.  This is for printing and placing on the desk under the raised player.  The image acts as a reflection of the FTSB board above to make orientation of the calibration points easier during servicing:

FTSB VR Guide (inverted)

Purpose of the calibration points

The purpose of the calibration adjustment variable resistors (and the calibration procedures that use them) are as follows:

  • VR1 – RF Gain
    • RF Gain adjustment
  • VR2 – Tracking Balance
    • Grating temporary adjustment and tracking balance adjustment
  • VR3 – Tracking Gain
    • Tracking servo loop gain adjustment
  • VR4 – Tilt Offset
    • None
  • VR5 – Focus Gain
    • Focus servo loop gain adjustment
  • VR6 – Focus Balance (T.E)
    • Grating temporary adjustment and tracking balance adjustment
  • VR7 – Focus Balance (C.T)
    • Focus error balance adjustment
  • VR8 – Tilt Gain
    • Tilt gain adjustment
  • VR9 – Tilt Balance
    • Tilt gain adjustment

Adjusting the calibration points

Adjustment should be made with a small, insulated flat-blade screwdriver.  Care should be taken to rotate the variable resistors gently and not exceed the maximum limits of the variable resistor in either direction.