UPdate my alpine changer cha-634

[afshindiy]

Hi

I've read this service Manual . But I never
I had no such problem. The sensor is sensitive because I knew I did not open it.
I do not know about the sensor reset method(page17)...
You can try and see what happens ...
I think if you do not get Any movement of the motor ...by trial and error(sensor position volume).
Another problem may exist.

thanks

 

[Gamma ed]

CHA1214 also has chip 501 with pin, init switch, this is interupted and put to gnd. Page 30 you find circuit draiwing with chip 501 https://www.scribd.com/doc/250200725/ALpine-cha-1214

CHA634 (this one we have), also have pin init switch on chip 501 (but other type ic),but not sure if I can do the same over here. Page13 you find circuit drawing with chip 501 https://www.scribd.com/doc/248791861/ALpine-CHA-S634-Service...#force_seo

 

[Gamma ed]

I have asked alpine for help, with the question if its the same with cha634

Another question, l also own a cha1214, do you think chip 501, pin 6 TX, is also digital out and useble for optical out? MN66271 Datasheet(PDF) - Panasonic Semiconductor

 

[afshindiy]

I have asked alpine for help, with the question if its the same with cha634

Another question, l also own a cha1214, do you think chip 501, pin 6 TX, is also digital out and useble for optical out? MN66271 Datasheet(PDF) - Panasonic Semiconductor

no RX and TX is serial data system control (mechanism and program control )

 

[Gamma ed]

Back to the chas634, there is no reset for this one, so something is wrong.

I have been measuring, ic104, saw some differences:
pin 6 0 volt
pin 8 0 volt
pin 12 0,3 volt
pin 22 0,23 volt

But this is measured with no cd turning, so I wonder if this is good? What do you think ? What else can I try to check better?

 

[Gamma ed]

Merry cristmas to you all

https://www.scribd.com/doc/251045332/Alpine-cha-s624-service-manual

looked agai at the chas1214 and the chas634 and here they use pin tx for toslink out. So i have measured pin 6 but it was 0 volts. Does it need to be activated or something like that?

Also bussy with the 634 but its a hard nut to crack

 

[pass90]

Hi, i resume the thread! Did you managed to get the optical out (or coaxial at least) from an ainet cd changer? I have a cha 1204 and looking to datasheet it seems easy to do, but maybe it isn't...

 

[Kando]

Hi, i resume the thread! Did you managed to get the optical out (or coaxial at least) from an ainet cd changer? I have a cha 1204 and looking to datasheet it seems easy to do, but maybe it isn't...

I'd certainly like to know that as well. 🙂