Marantz cd 54

isitrisky · 29th May 2011, 03:39 AM

Odd behavior...I posted earlier on how my cd 54 will not play unless warmed up..tonight after a few drinks i wanted to have a look under the hood..so i powered it up with disc in place from cold and it would not read TOC...so i flipped it upside down to undo the bottom i noticed that it was reading TOC...odd..not sure why?could it be something to do with the turn table? Anyone know? thanks in advance...

Mooly · 29th May 2011, 06:36 AM

Have you replaced any caps ? If this uses the Philips swing arm type RAFOC then there is a 33uf cap that is a common problem on the servo PCB under the laser.

poynton · 29th May 2011, 07:31 AM

Hi.

Mooly is correct.

As this is a first generation player with the CDM-1 and TDA1540 DAC chips, the cause of the problem is most likely to be old electrolytic capacitors.

As Mooly said, one of the common problems is a 33uf cap to be found on the board attached to the cd mechanism. These should be changed for IDENTICAL value caps as they are value sensitive.

It is also likely that the main caps on the power supply board are also in need of changing.

Remember ... if changing components, one thing at a time then test otherwise you may create a new fault and be unable to determine where it is !!

It should be a very easy fix.

Andy

.

isitrisky · 29th May 2011, 11:54 AM

Will start with the 33uf caps...I swapped out the 2200uf and 3300uf with no change...so next tep will be the 33uf...thanks

Mooly · 29th May 2011, 12:11 PM

Its the most common problem on these... don't use 47uf or 22uf... it has to be 33uf for this.

29th May 2011, 03:39 AM	#1
isitrisky diyAudio Member Join Date: Mar 2011 Location: Los Angeles	Marantz cd 54 Odd behavior...I posted earlier on how my cd 54 will not play unless warmed up..tonight after a few drinks i wanted to have a look under the hood..so i powered it up with disc in place from cold and it would not read TOC...so i flipped it upside down to undo the bottom i noticed that it was reading TOC...odd..not sure why?could it be something to do with the turn table? Anyone know? thanks in advance...

29th May 2011, 06:36 AM	#2
Mooly diyAudio Member Join Date: Sep 2007	Have you replaced any caps ? If this uses the Philips swing arm type RAFOC then there is a 33uf cap that is a common problem on the servo PCB under the laser. __________________ ------------------------------------------------------- *A simulation free zone.* *Design it, build it, test it.*

29th May 2011, 07:31 AM	#3
poynton Magneto the Gravity Man diyAudio Member Join Date: Mar 2005 Location: A life on the ocean waves when I'm not at home in N. Wales (but I'm not Welsh so no sheep jokes!)	Hi. Mooly is correct. As this is a first generation player with the CDM-1 and TDA1540 DAC chips, the cause of the problem is most likely to be old electrolytic capacitors. As Mooly said, one of the common problems is a 33uf cap to be found on the board attached to the cd mechanism. These should be changed for IDENTICAL value caps as they are value sensitive. It is also likely that the main caps on the power supply board are also in need of changing. Remember ... if changing components, one thing at a time then test otherwise you may create a new fault and be unable to determine where it is !! It should be a very easy fix. Andy . __________________ If it ain't broke, break it !! Then fix it again. It's called DIY !

29th May 2011, 12:11 PM	#5
Mooly diyAudio Member Join Date: Sep 2007	Its the most common problem on these... don't use 47uf or 22uf... it has to be 33uf for this. __________________ ------------------------------------------------------- *A simulation free zone.* *Design it, build it, test it.*

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

29th May 2011, 11:54 AM	#4
isitrisky diyAudio Member Join Date: Mar 2011 Location: Los Angeles	Will start with the 33uf caps...I swapped out the 2200uf and 3300uf with no change...so next tep will be the 33uf...thanks

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Marantz CD-84/CD-74 service manual?	bleachershane	Digital Source	5	4th March 2012 11:00 AM
FS: Toroidal Transformer 54-0-54	theAnonymous1	Swap Meet	3	11th October 2010 11:08 AM
Marantz cd-54	billbo	Digital Source	2	2nd September 2010 02:22 PM
HELP ! How do I add a DAC to a Marantz CD 54	lorienblack	Digital Source	3	31st December 2009 09:23 PM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read