mikemo

Yes, I checked the power supply voltages on then craigslist mz-m100 and they are also fine, 11.4V and 2.4V. Just to be thorough, I swapped the switch board between the two. No changes, so the faults lie in the switch board. The switch board is not a servicable part. There are two "chip on board" processors, I assume one for Comm and the other for the OLED. Jim confirmed that he's never been able to repair an OLED display board for these units. I'm trying to decide how badly I want to get this fixed. Online prices for these units seem to have gone skyward. I'll keep my eyes open for another unit that has a good display and a bad mechanism.

I received my "craigslist" mz-m100 yesterday. Sadly, everything works except the display. This one is completely dead, not just dim. So now I have two that need repair Jim Hoggarth did get back with me and told me that he does not have any replacement display boards for the RH10. Oh well.

Yes, I did. He charged me a good bit more to ship it, and I have no idea what condition it will be in (if I get it at all), but it was worth the try. I'll post a follow-up when I get it. Mike M

Interesing info. Mine is the same on internal battery, sidecar battery, external or USB. Still very dim. I don't think this is adjustment related. The two power sources to the switch board measure right at the design spec (see above note) and they don't appear to be adjustable via the cpu. I took a look at the MZ-RH910 service manual and it looks almost identical. It does not have the 11.4V boost supply for the OLED. Those pins are grounded on the 910. It does have the same 2.4V VDD supply which I assume is for the logic on the board. I guess that the firmware would be different between the RH910 and the RH10. How does one get in touch with Jim Hoggarth? Thanks Mike M.

Sony_Fan, Thanks, nice find. That might just do the trick. I'll post my results. Thanks Mike M.

I have the same problem with my MZ-M100 (same as the MZ-RH10). This was a sudden problem. One day it was fine and the next the display was very dim. The display still shows all the info correctly, and it actually dims after a few seconds like it should, it's just much dimmer than normal. I got the service manual and poked around a little hoping that I could find a simple fix. The OLED sits on what the manual calls the "switch unit". I was hoping that since it was dim that it was just a power supply problem. I checked the two power sources on the connector CN471 that goes to the switch unit. OLED_VCC was 11.4V and OLED_LCD_VDD was 2.4V, which look correct to me. Since I don't see a "brightness" signal going to the switch unit I assume the brightness is controlled by a serial data command from pins 7, 8 and 9. There are no schematics or details for the switch unit in the manual. It looks like it is just replaced as an assembly, part number A-1104-960-A. Of course, the Sony parts website shows that part as no longer available. A google search of the part number returns lots of sites that say "no stock". Any suggestions for a repair? I suppose I could dig into the switch unit and see if I can find the problem, but without schematics that will be tough. I also run the risk of damaging the unit which although dim, functions fine. Does anyone have a broken MZ-M100 or MZ-RH10 with a good display? Thanks Mike M.

Just got a surprise. I picked up a NW-E005F today as a gift for my son. At the register it rang up at $89.99. Wow, I expected the same as the web site price at $109.99. So, just in case anyone wants one, this seems like a good deal. Regards, Mike M.