Pioneer LD-V4300D Overview


The Pioneer LD-V4300D is the reference Laserdisc player for the Domesday Duplicator board.  The player was chosen for several reasons:

  • Single-sided industrial player – The player is well constructed and the single-sided design means the optical assembly has strong linear tracking mechanics
  • PAL and NTSC compatible – The player is can be switched for both PAL and NTSC discs
  • Digital and Analogue audio – The player supports both the analogue audio (used by the AIV laserdiscs) and digital audio (used by more modern discs)
  • Serial remote control – The player can be controlled by a computer using the serial control port.  This port supports both RS232C and TTL level serial communication
  • Relatively modern player – Most players were constructed around 1998 making the LD-V4300D fairly modern by laserdisc standards
  • Documentation – The service guide and other documentation is available for the player
  • RF output – The player has an 50 Ohm RF test point that is relatively easy to access and provides a reasonable strong signal
  • Head interlock mechanism – The player features an automatic head interlock mechanism that fixes the optical assembly in place when not in use.  This makes the player easier (and safer) to transport

Front and rear panels

The following image shows the front-panel of the LD-V4300D:

LD-V4300D Front Panel

The following image shows the back-panel of the LD-V4300D:

LD-V4300D Back Panel


The following links provide PDF versions of the documentation for the player:

Pioneer LD-V4300D Specifications

Pioneer LD-V4300D Operating Instructions EN

Pioneer LD-V4300D Service Manual

Restoration, repair and calibration guides

A guide to the disassembly, cleaning and reassembly of the LD-V4300D is available here.

A guide to adding a RF output connector (for connection to the Domesday Duplicator) is available here.

Serial control adapter

The Pioneer LD-V4300D provides access to the serial control features of the player via a 15-pin DSUB connector on the back panel of the player.  This type of connector is a non-standard output as it provides pins for both RS-232-C level (12V) signals as well as TTL (5V) level signals.  In order to connect the player to a computer using a standard USB to 9-pin DSUB connector an adapter should be made using a male 15-pin DSUB and female 9-pin DSUB with the following connections:

Player pin 1 (GND) – Host pin 7
Player pin 2 (TxD) – Host pin 2
Player pin 3 (RxD) – Host pin 3
Player pin 4 (DTR) – Host pin 5

Pioneer LD-V4300D Serial Adapter

Note that this is a DTE to DTE cable (rather than the DTE to DCE cable shown in the manufacturer’s documentation).  The pin out in the manufacturer’s document will require a DTE to DCE converter if used with a modern USB adapter.