Frequently Asked Questions
Q: Is CD Pro same as CD Pro 2?
All of the CD Pro family of drive modules are backward (and forward) compatible with all other versions of this family of drive modules – at the complete-module level. They all have the same electrical connections, the same communication interface, and the same mounting points. However, at the component level, the optical pick-up unit and the control PCB are not interchangeable. Mechanically they are very similar. Along the way, Philips did make certain refinements to improve performance and playability. New production of the CD Pro 2 LF (the final version) ended in 2013.
Q: How do I identify CDM 12, CD Pro and CD Pro 2?
Most often, people identify these CD drive modules as simply “CD Pro,” due to that designation being stamped into the “extension plate” of the drive module. Close investigation will make it apparent that that plate, which gives these drive modules their familiar rectangular profile, is not in fact an integral part of the drive. This plate is attached to the drive module, and is largely ornamental. However, it is also part of the Philips mounting & suspension system. Most jukeboxes utilize the extension plate, while many hifi decks do not.
The model number or serial number of your jukebox or hifi deck does NOT indicate the version of the Philips CD drive module that is installed in your gear. The most accurate way to identify the version of the drive module that you have is to locate the ID sticker on the drive itself. This is a small, white label on one of the short, vertical sides (what we refer to as the “butt end”). It looks like a bar-code label and has a lot of numbers. The number that identifies the version of the drive module will most likely begin with the 3-letter prefix “VAU” (for CDM12 Industrial it is AH03).
VAU 1254/31 LF = CD Pro 2, v2.0 (firmware v6.8)
VAU 1255/21 LF = CD Pro 2, v2.0 (firmware v6.8)
VAU 1254/31 = CD Pro 2, v2.0 (firmware v6.8)
VAU 1254/11 LF = CD Pro 2, v1.0 (firmware v5.0)
VAU 1252/10 LF = CD Pro 1
VAU 1252/00 LF = CD Pro 1
AH03 xxx… = CDM12 Industrial
Compare the player modules:
| CDM 12 | CD Pro 1 | CD Pro 2 |
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Q: What is the most common problem with these CD player modules?
The optical pick-up unit (OPU) is by far the most troublesome component. It is quite likely that whatever issues your jukebox or hifi player is exhibiting will be remedied with a new OPU. Turntable motor problems are less frequent, but replacing this motor is sometimes required. We also occasionally find problems with the module’s circuit board.
Q: How long does it take to replace the optical pick-up unit (OPU)?
Depending on your skill level servicing small electronic devices, all procedures should take approximately 30 minutes.
Q: What tools do I need to repair the CD module?
At minimum, you will need a #6 and a #10 torx screwdriver, small flat screwdriver, and your reading glasses. All screwdrivers can be purchased in our Store. A soldering iron will also be necessary if replacing the turntable motor is required.
Q: Is there any modification necessary to repair the module?
No. Simply replacing the OPU or turntable motor is all that need be done.
Q: Is there any adjustment or calibration necessary to repair the unit?
No. All required adjustments and calibrations are performed on all new OPUs at the factory.
Q: I replaced the OPU and the player module still does not work. What gives?
If it exhibits the same symptoms as before you started the service process, the problem is not with the OPU. Depending upon the symptoms you observe, it is possible that the turntable motor may need to be replaced. Also make sure you did not use an incorrect OPU. CDM12 & CD Pro 1 OPUs are not compatible with CD Pro 2 OPUs. In rare instances the new OPU you have may be bad. Please contact us to discuss these issues.
Q: Should I perform regular maintenance on the CD player module?
Regular cleaning of the focal lens is highly recommended. You can purchase a lens-cleaning kit in our Store. Philips does recommend lubrication for older modules, particularly the CDM 12 Industrial. You can purchase the recommended Tribol molybdenum grease in our Store. See the factory maintenance instructions on our Service page for more information on these procedures.
Q: What lubricant should I use?
The Philips factory recommends using Tribol Molub-Alloy 9890-2 lubricant. It is manufactured by Castrol Germany and is quite uncommon. We do have limited stock of the Tribol, available in our Store. The recommended substitute is Krytox GLP-204 by Dupont.