I found a Sony CFS 100 on offer and didn't think a lot about it, as it is a very interesting and special (and odd) "portable" stereo system. It's mine now. It has must have been owned by a heavy smoker, as I already did a lot of cleaning and I still have to do more, which I'll be happy to do. And..., all the belts have to be replaced. I'm having some trouble finding the correct main belt path of this cassette-corder. Of the main belt there were only a few hardened pieces left inside, the service manual has no clear belt path diagram. Is there an easy way to find the correct path? Has anybody ever peeked inside and have some photos to share? I attached some photos of the missing belt situation of mine - see the missing belt on the motor pulley. I'll be very happy if you could also share some documents, manuals, etc. if you have any. The I assume how the belt path could work through the midway flywheel on to the big one, finding the right size will be difficult. Wiki Boombox picture Kind regards, Miha
Hi! Thanks, this is just the way I was going to try it. I am waiting for some ordered rubber belts now.
Those are really cool looking, one of the strap-box models I don't have yet. It looks like it was called the CFS-600 in Japan. Service manual, I think you already have this? 8 watts a channel, not bad! https://archive.org/details/manual_CFS100_SM_SONY_EN Some great photos over on Audio Pub, use google translate to read it in English http://audiopub.co.kr/2019/07/13/sony-cfs-600-기능적-하이브리드/ 1000mozi https://1000mozi.blogspot.com/2017/09/53.html Looks like the speakers are prone to rot, are they cast metal? http://www.video-koubou-topaz.jp/SONY-CFS-600-RIPAIR.html One of the brochures from Japan for sales says it's from 1978. I don't know that sounds really early because it looks so good and much more modern.
I can believe 1978 as the silver is so 1970s. By the 1980s black was the in colour. Some good information on the Boombox wiki https://www.wikiboombox.com/tiki-index.php?page=Sony+CFS-100 Of course I had to look how much 89800 yen was in 1978. About two weeks wages for the average Japanese worker https://nbakki.hatenablog.com/entry/Changes_Wage-Workers_Salary_1950-2013
Thank you! Some of those I have managed to find myself, but not all of them. I haven't opened the speakers yet. They do have some weight to them, I believe they are solid metal, but will get back to you when I open them. The service manual for this CFS 100 is for a E and US model.
It took me a while to order and receive a set of belts, then another one, but now the cassette part is running like it should. The main belt path was just like Silver965 suggested, only the other way around on the motor pulley. I still need to adjust the speed, but for now I don't have a speed test tape. It's on the to-do list. I do have a question, for anybody who knows a thing or two about electrics (I don't). I need to replace the two LED lamps which illuminate the tuner dial which don't work. They are both wired to a mini board. I tested both with a 3v DC connection, but there was no sign of life. Strangely I can measure AC on this little board, while the system is powered on. I always thought that LED lights work on DC, like the power light indicator does on this Sony. Can this be some serial LED arrangement (most likely with an additional capacitor, which I didn't see)? It seem those are normal 3mm while LED (they had a blue rubber cover on them, not on the photo. Should I just get two new 3mm white LED lamps and solder them on? How do I put them into connection with the right polarity? I can't see how the existing ones are connected. Can this be measured somehow?
From that From that era they are far more likely to be "Grain of wheat" incandescent bulbs. I believe even later models like the FH7 used those for area illumination of the LCD displays. When on my main computer I will tell you about replacing one with an LED in my Weltron 2001 Edit The lights are more likely to be something like this https://www.ebay.co.uk/itm/354208757810 On the Weltron, which runs of 12V I bought LEDs like this https://www.ebay.co.uk/itm/263692114891 They turned out to be far too bright and were drawing more current than an incandescent so I changed the resistor to a much higher value. I could have just put it in series with the one wired to the LED. If your supply is really AC you might need to put a diode in series as well to stop the LED seeing the reverse voltage.
Hello .. From the diagram there are three lamps as shown by @Longman But the power supply is 12 volts and goes through the leaf switch
Hi, Longman and Silver965, thanks! I did not see that tiny 12V description. I'll need to check the voltage again then. My Fnirsi 2C23T set on auto was reading 24V AC. I have another instrument and will measure it again, maybe it was a false reading. I'll let you know what I find.
Hi Miha, Sliver965 and Longman I have read the thread and it's really full of useful information thanks to your knowledge I inherited from my dad sony CFS-100 and I am trying to refurbish it as it's an important memory to me and I bought new belts and tried to follow up with the diagram by Sliver965 and the description of Mihai, but seems I didn't get it right since when I test a tape it messed up and also the rewind didn't work.. I attached a photo of my belts configuration, hope you could help me finding the right path for the main belt since I think small silver pully need to be attached some how to belt Thanks in advance for your help
I managed to bring the mechanics in working order, but found something is wrong on the power transformer side - one part of the board is getting very hot and some parts most likely need to be replaced. As I am no expert in this field I'll need to find somebody who can fix this for me. I still have it opened up and can make some photos of the correct belt paths, if you need them. I could do this next week.
Hello Mihai Yeah it would be great to check all the working mechanism.. Cause really it's so painful trying to interpret the manual Thanks in advance for your help and I will be waiting for photos Thanks again
