matrulesok Posted April 15, 2005 Report Share Posted April 15, 2005 (edited) My brother has a sony mz-r700, but the headphone socket (I think) is playing up. There will be no sound, but if you wiggle the jack, it'll work, then it'll go off again etcI thionk this may be a common problem because my friend also had one and the same thing happened. I assume therefore that this has already been dealt with, but I cant find it. Thanks for any help!Edit(p.s. he dosent have the remote - he got the player cheap a few years ago from a catalogue clearence place) Edited April 15, 2005 by matrulesok Quote Link to comment Share on other sites More sharing options...
Christopher Posted April 17, 2005 Report Share Posted April 17, 2005 What you'd basically have to do is replace the headphone jack part of the R700, a small part/fix that would have to be ordered from a Sony parts center. Either of you any good at this stuff? If not, it may just be more reasonable to pick up another cheapish unit.. Quote Link to comment Share on other sites More sharing options...
matrulesok Posted April 18, 2005 Author Report Share Posted April 18, 2005 What you'd basically have to do is replace the headphone jack part of the R700, a small part/fix that would have to be ordered from a Sony parts center. Either of you any good at this stuff? If not, it may just be more reasonable to pick up another cheapish unit..←I may take it up as a project! But the chances of success aren't great Perhaps you are right about the cheap alternative, he may go for an mp3 instead (he is pretty lazy and putting stuff onto minidisc is time consuming! ) - its his loss! Quote Link to comment Share on other sites More sharing options...
doctorminidisc Posted June 8, 2006 Report Share Posted June 8, 2006 Did anybody ever replace the headphone jack on one of these? Or is there a place online where someone outlines MD repairs? I kind of expected more of a forum than 'buy a new one'. Quote Link to comment Share on other sites More sharing options...
A440 Posted June 8, 2006 Report Share Posted June 8, 2006 http://www.minidisc.org/repair_info.html Quote Link to comment Share on other sites More sharing options...
Ral-Clan Posted June 13, 2006 Report Share Posted June 13, 2006 My brother has a sony mz-r700, but the headphone socket (I think) is playing up.This has started happening on my MZ-R700 as well. I opened it up and re-touched all the solder points, plus cleaned the inner contacts of the headphone jack extremely well. It helped a little but didn't solve the issue. I think the part has to be replaced. It looks possible except for the fact that the jack is also attached to the remote control connector. This makes replacement (desoldering, etc.) much trickier....it's very crowded in there. Quote Link to comment Share on other sites More sharing options...
chinkdup Posted July 5, 2006 Report Share Posted July 5, 2006 (edited) i have a mz-g750, sand got into my player, into my discs, and i ordered a replacement jack. wasn't careful when doing the soldering job, i think i fried the new part as well as the surrounding parts. This was about 4 years ago. I think i may give it another shot next week.it was extremely crowded, if i recall. very difficult to replace the part if you dont have the proper tools. I can't believe i tried to use a little desoldering vacuum pump to suck up the solder.anyone know the part # of the headphone jack? Edited July 5, 2006 by chinkdup Quote Link to comment Share on other sites More sharing options...
Ral-Clan Posted January 11, 2008 Report Share Posted January 11, 2008 (edited) I found this service tip online:http://www.minidisc.org/manuals/sony/servi.../sony006209.pdfGoing to try it tonight. Expect it to be very tight working in there, but I've not got much to lose at this point as this unit is now on the verge of failing (alignment problems, mic pre-amp problems, headphone jack problems). If this works, it will give it a bit of a lease on life.ADDENDUM: I opened up my MZ-R700 so I could see the board. Then I inserted a headphone plug in the headphone jack, and played a disc. I wiggled the plug in the jack to flex the board in order to have the audio cut-out. By doing this I was hoping to see an obvious solder break would open up and be visible (I had to use an eye loupe becuase the parts are very small). After doing this I noticed, to my surprise, that the audio was now playing well through the headphones. Despite a lot of wiggling, it was now hard to get the audio to cut out (previously there was NO audio at all unless you deliberately held the plug in the jack with finger pressure).So, I just closed the machine back up withough doing any soldering. The headphone jack works much better now for some strange reason and only cuts-out temporarily out if you really to wiggle and hold the jack at an angle. So go figure. Something obviously moved inside and contact was made again. Well see you long that lasts. Edited January 12, 2008 by Ral-Clan Quote Link to comment Share on other sites More sharing options...
Ral-Clan Posted September 28, 2012 Report Share Posted September 28, 2012 Hi, I am reviving this old thread to add some information to it. I successfully fixed the headphone problem in my old MZ-R700. As you can read in this old thread, the headphone jack began to fail in 2006 and is a common problem in MZ-R700s. As mentioned in the Sony service memo linked to in a message I posted above in 2008, I was able to locate IC302 and resolder all the pins around it (just touch all the pins with a hot, tinned soldering iron to reflow the existing solder). After doing this my headphone jack works again without problem. IC302 is an extremely small, square integrated circuit on the underside of the MZ-R700's circuit board. It's only about 5mm x 5mm. If you can find the service manual for the MZ-R700 online (it's available - Google it) you will see a diagram of the circuit boards in this unit, one of which will show IC302's location. It's located right under the headphone jack (on the opposite side of the board). All you have to do to get at it is remove the four screws on the sides of the MZ-R700 and then remove the lower plastic shell of the unit. Once you do that then IC302 will be exposed. I was able to re-attempt this repair because I was recently given a very fine tipped soldering iron and had purchased a 10x jeweller's loupe. WIthout this equipment the repair will be almost impossible. Even so, it was VERY tight work. My soldering iron, with a tip slightly thinner than a very fine ballpoint pen, was almost too big for the job. To do it without fuss you would need a solder tip similar in size to a sewing needle or straightpin. However, with some luck and great care (and while holding my breath) I was able to retouch the solder on the pins of this IC. So these units are repairable. You must be very careful with the headphone jack though....any great twisting of the headphone connector which would stress the jack apparently transfers this stress to the circuit board, causing the solder on the IC to crack. Even though I don't like using the remotes, I would advise it, as the remote uses a 1/8" phono connector AND a male edge/slot connector - which when combined might take up some of the stress. I had been using my MZ-R700 with only a pair of earbud Sennheizer headphones, without the remote in between them. This may have contributed to the problem. Quote Link to comment Share on other sites More sharing options...
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