kgallen

On this link @Piotr W shares the essence of the conversion to EU/UK/AUS mains voltage:

@Piotr W very interesting and novel solution to the problem - I like it!

Belt problems can leave the mech in the wrong position -> machine won’t exit standby. Try manually winding the gears to insert a disc then see if machine will boot.

As you needed to repair the unit which originally had a bright display I would advise checking the power supplies to the VFD. Onkyo probably don’t do a service manual but as you’ve clearly got the skills to repair the display board I would look on you tube for some tutorials on VFDs. Regarding power supplies to the VFD there will be a dc one around 3V and an ac one around 24-30V.

If you mean the drive in a deck then the same drive is usually used in the same generation of deck. Look at the last two digits per the examples from @BearBoy. But you can’t swap between generations e.g. you can’t put a drive from a 530 into a 520. The drive has the ATRAC chip on it and these chips evolved over the years as the ATRAC coded was revised. Also some machines of the same generation have a variant of the drive which makes them incompatible. For example the ‘pro’ machine MDS-E10 has an MDM7SC drive in it and you can’t swap that for a consumer MDM7A from e.g. an MDS-JE440. Similarly the MXD-D4 high speed dubber uses an MDM7AX2 which supports the high speed dubbing. Again you can’t drop in a ‘vanilla’ MDM7A drive from a 440. If you give a list of your machines we can be more specific on what options you have.

Too many good questions @sfbp but I can’t answer them now other than agree that a higher voltage sidecar cell can couple easily to a lower voltage gumstick. From what I remember of the schematic there is just a low value resistor between them.

Looking at the schematics you should be fine with an NiMH AA or an alkaline AA in the sidecar. All supplies end up at a couple of fancy power supply chips containing boost regulators. I can't find any proper datasheets for the chips but they look like they are there for handling cells of this type and for charging an NiMH gumstick (but not an NiMH in the sidecar). Probably in service mode those voltages that are a little out of spec need tweaking - the power supply chips look like they have some programmability so you can probably adjust them in service mode (need to recheck the SM!).

Hi, I'm very impressed by the extensive commentary from @sfbp (I didn't know you had all this in you Stephen!) and the measurements and observations by @valentinc!!! I'm not sure if I can add much at this point. I will have to download the schematics and take a look at Stephen's question. I do agree that NiMH has a lower cell voltage than alkaline although without digging in I don't know what is the tolerable range of input voltages for the 910. It's going to have a boost converter in there to provide a higher initial voltage for further regulation and I would hope that would support down to 1.1V or better 1.0V. That the NiMH has a longer plateau voltage around 1.2V should be workable if the boost is as I hope. Here are a couple of datasheets for NiMH and alkaline. They are a little generic but might be interesting: https://data.energizer.com/pdfs/alkaline_appman.pdf https://data.energizer.com/pdfs/nickelmetalhydride_appman.pdf

... and stop there, you've got enough machines already! 😄 (Only kidding, seems I have Saved Searches of a similar ilk too. I'm not sure why, it's not a good thing...)

Are they actually from the search or under a subtle grey partition saying something like ‘similar items you might be interested in’? My 980 search always contained mostly 920,930,940 machines.

@BearBoy Originally I was aiming to add optical out for both the CD and MD sections of an MXD-D4 combo deck. Your request was for the coaxial output and I fancied the challenge! 😀

No, you’re right, seems not. I messed about a bit creating Sony accounts in JP and UK and got nowhere!

You mean we could have bought MDW80T direct from Sony for 2GBP each? https://pur.store.sony.jp/rec-media/products/MDW80T/MDW80T_purchase/

😆 ’spreadsheet’ - and I thought I was a disc nutter 🤣

Yea well I need to be sending you one even if you blutac it to the wall. It was all your fault 😁😆