Sony MDX-CA680X Clock Issues

[chadergeist]

I have this auto md reciever and i bought it from someone on Ebay from England and it didn't come with a manual. I downloaded the manual online and it doesn't refer to the issue i have about the clock setting. You see it only shows the clock in army time. 13:00 and on to 24:00 and i don't see a way to correct this. Does any one know or have the UK model with book? I checked on setting the clock on the unit as well as going through the menu on the unit and don't see anything to change the clock further with a setting of 12 hour or 24 hour setting.

[sfbp]

Hmmm... I guess time in Europe is only used by armies

The system controller on this model is actually a different chip between the US and "Euro" editions. Hope you don't plan to listen to AM on it, as the stations are preset with 9Khz spacing, which is quite annoying - whereas time is fairly simple to alter, you can just reconfigure the Hum in the HumVee.

The CA790x has the same problem only worse - they may have never made a US edition at all. FWIW that model has three pins on the master controller DEST1 DEST2 DEST3 allowing the setting for different markets, but there's nothing in the service manual about how they are connected.

On the CMT-PX3 (bookshelf) there are also DEST1 DEST2 DEST3 which control (by resistors pulled high or low)

a. Number of bands (MW/VHF vs LW/MW/VHF)

b. Channel spacing (9 vs 10 kHz on MW, 25/50/100 kHz on FM)

c. VHF range. This is 76-90 for Japan, 87 to 108 for elsewhere and could be 76 to 108 for "world" except there was no World version. For cars, you would never need a "world" version unless you are that rare bird who takes their auto on the high seas.

Even then it (the bookshelf unit) still uses a physically different "tuner pack", and won't work without the right one. I was lucky to get the replacement to fit into my "Japan-only" model, but on either of the mentioned auto units (680/790) there's probably nothing you can plug in.

Better drive that car back to the old world.......

To be serious for a moment, you can investigate what happens when you tie pin 9 (DESTSEL) on IC501 to +5V instead of ground - that's how we reconfigured the PX3 which is of the same vintage. But the side effects and assumptions of so doing are of course completely unknown.

Stephen