HISTORY:
Sustainability is the name of the game! Anything (that has been tested and still functioning properly) should be repurposed creating saving in wasted Ee and reducing the poisoning our environment when items are buried in the earth at the local tip needlessly.
Never heard of Ee? It is a concept that creates a measurement of ALL things (not just electronics) that humans have made and the energy used in obtaining the raw material, processing the materials right through to a finished product and even should include the shipping of the item to the distributors/retailers.
If you would like to know more about Ee values, please take a look HERE
While the Marantz PMD340 is a good workhorse in the audio production environment, it becomes pretty useless once the CD drive fails and the laser assembly has gone A.W.O.L!
This machine was in use by us for long periods in a studio environment, never missing a beat until the laser needed replacing. Tech's took the laser electronics out to have them replaced and "poof" disappeared, somewhere. So I have this PMD340 which is absolutely fully functional but without a laser - pretty useless.
I no longer am prepared to spend time servicing our equipment (retired and TRYING to have a break from all that) and as a result, this equipment has now become an "organ donor" for other PMD340 owners.
This is the MAIN BOARD, (the brains of the equipment) also referred to in the Service Manual as PD01
Perhaps you need a different part for your PMD340 ... To see the other items I have from our PMD340, please take a look HERE
MARANTZ - CD Player MAIN BOARD ONLY
General Information PMD340
Made in Japan
Rack case construction
Single CD unit
Supports standard CD-DA discs but ALSO CD-TEXT (extremely useful for production house produced CD's which may have special information in this area)
Large easy to read Orange backlit display
Pitch change/bend user control
Analog audio outputs (Balanced & Unbalanced)
Digital outputs (SPDIF)
Error correction method: Cross-interleave Read Solomon code (CIRC)
16 bit linear quantization
Built in test modes (explained in the Service manual)
Wired remote control ports
Now to the specific information about this PMD340 Module, the MAIN BOARD
Part # WG374K101-0 PD-01
Function is to filter the raw AC from the transformer assembly, filter and distribute the required DC power rails, Digital to Analog conversion, Filtering, Equipment control and laser control/read, Output signal filtering etc
If you have trouble with your own PMD340, this board is the "brains" of the equipment.
NO permanent interconnections i.e no de-soldering, all signals are routed via connectors on this board.
Screw down (Philips head screws) supports which are easy to remove and access/replace the board. Little piece of useless information, the screws look to be Copper, they are NOT. Copper coated perhaps but they are definitely ferrous, I think pure Copper screws would have been too soft anyway!
DAC used is the PCM1710 (Burr-Brown)
Excellent IC block diagrams, pinout information of ALL integrated circuits are included in the Service manual (manual supplied if requested - 24 printed pages)
Test mode allows for the testing of all buttons, switches, display, LED's and EEPROM complete tests. Instruction on accessing this mode are in the Service manual.
ALL original mounting hardware (standoffs, screws, metal bracket etc) are included in a small sealed side packet.
PCB DIMENSIONS:
240mm x 155mm
TESTING:
Fully functioning until the laser assembly failed, now that the complete CD drive assembly has been removed the system still works (in a fashion) with all front controls active such as track selection, pitch bending etc but of course anything that requires signals back from the laser reading do not work!
This PCB has been carefully removed from the equipment while taking standard ESD precautions and the board is now placed in a sealed ESD safe packaging, awaiting it's opportunity to breathe new life into another PMD340!
