diyAudio

diyAudio (http://www.diyaudio.com/forums/)
-   Digital Source (http://www.diyaudio.com/forums/digital-source/)
-   -   HELP! Marantz cd65 MKII fault (http://www.diyaudio.com/forums/digital-source/175461-help-marantz-cd65-mkii-fault.html)

antony28 16th October 2010 01:12 PM

HELP! Marantz cd65 MKII fault
 
I have a super problem: my Marantz CD65 mkII, while adjusting the focus of the lens (trimmer 22k), has begun to smell of burning on the side of the trimmer (with a light smoke), but I did not understand where it came from. I changed the 22k trimmer but the result has not changed.

Now the lens is locked in one position (upper bound) and the laser does not emit more "light" ...

I thought I was a "burning" of the IC TDA5709 or TDA5708

Any ideas?

HELP!!! Thank you!

PCB : http://img163.imageshack.us/img163/3320/dsc01481i.jpg

antony28 18th October 2010 11:28 AM

I would not be wrong but I checked several times and all the resistance around the TCA0372DP2 have power equal to zero volts.

I also noticed that the heat TCA0372DP2 lot but I think it's normal.

I think the problem is in that area ...

I forgot to tell you that the lens is the philips CDM4/19.

Mooly 18th October 2010 11:59 AM

The problem could be anything... get a circuit and check all the supply rails are present and correct. You may have a rail missing (open circuit safety resistor).

antony28 18th October 2010 08:40 PM

Almost all the capacitors have become short-circuit (1ohm more or less). In the image I have marked almost all :-)

The tension of the IC 6526 (Motorola) is less than 1 volt. Now, the lens does not receive any signal, as off. The IC 6526 does not heat anymore so I assume it's broken.

Now I try to replace the IC 6526 and all resistances damaged.

http://img202.imageshack.us/img202/3219/dsc01481mod.jpg

Uploaded with ImageShack.us

poynton 18th October 2010 09:26 PM

The components marked are resistors NOT capacitors !!

Do you have a circuit diagram ?


Andy

antony28 18th October 2010 09:59 PM

1 Attachment(s)
:eek::eek::eek: Sorry, I was wrong to write, of course, are resistors.:confused::confused::confused::confused:

Ivo-Cici 2nd March 2014 10:22 AM

Quote:

Originally Posted by antony28 (Post 2336999)
:eek::eek::eek: Sorry, I was wrong to write, of course, are resistors.:confused::confused::confused::confused:

And Do you have same conclusion ???
You solve the problem?:):)
Ciao

KatieandDad 2nd March 2014 11:54 AM

1 Attachment(s)
I would look at the components around the laser drive transistor. The laser will be unable to focus if it hasn't got a supply.

stenks 8th July 2014 09:49 AM

Marantz cd 65 MKII laser adjustment procedure
 
2 Attachment(s)
Can help.


All times are GMT. The time now is 02:49 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio


Content Relevant URLs by vBSEO 3.3.2