Question about Marantz CD-48 CD Player
Although I am a qualified electronics engineer,I have not been able to solve this problem on my Marantz CD 48 player.When a CD is inserted,the unit does not read the CD but instead it spins counter clockwise at very high speed. When switched on,the Display shows..Read > No Disc and then the CD rotates counter clockwise.No functions work at this stage and the power has to be switched off and on again to eject the disc.The Laser does not seem to be switching on either. Could someone help me solve this problem please?
Check the small signal transistors BC338 and BC328, they're under the transport mech and will be near where the spindle motor plugs in to the PCB.
One of the transistors acts as a brake which momentarily puts the motor in reverse polarity to stop the CD rotating during 'stop' or 'open tray' modes. The reason the CD is spinning backwards is that the transistor which drives the spindle motor forwards during playback is faulty and is triggering the braking transistor hence spinning backwards.
The transistors should be 'BC328-25' / 'BC338-25' (25v)
Replace these and all should be well.
Hope this helps
Posted on Sep 01, 2012
Is the master clock generator oscillating? Probably a 16 ish MHz crystal.
Posted on Dec 04, 2007
A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Jan 11, 2018 | Marantz Audio Players & Recorders
Jul 18, 2015 | Marantz Audio Players & Recorders
Mar 10, 2014 | Marantz CD-48 CD Player
Dec 10, 2012 | Marantz CD-17 CD Player
May 24, 2011 | Marantz Arch 1.0 Shelf System
Oct 21, 2009 | Marantz Audio Players & Recorders
Jan 25, 2008 | Marantz CD-48 CD Player
Feb 13, 2007 | Vestax Pdx2000 Direct Drive Turntable...
618 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: