H120 bad charger + RTC mod (solved)

[Wacholek]

Last month i fried my H120 player. I connected a nokia 4,5V charger. My original was lost. After a one day of charging player don't wont to turn on. Now its turning on when I press reset button. It's working fine but the main processor is very hot. When I plug in 5V charger you can't stay with the finger on it. Current drain from the battery is around 700mA when its on and hdd in working and about 320mA when the player is off. 
If any one knows what happened or maybe also how to fix this i will be very appreciated.
When I disconnect the connectors board even when the player is on there is no problem with overheating. I've got every tools needed to repair except BGA masks but I don't know the hardware.
Please help!!!

P.S.
How to flash with the new firmware without running oryginal firmware. I run the player on RockBox but on original it hangs.

[Wacholek]

I've done some search and I find think that is responsible for non-stop current  consumption of my player plus non response for pressing play button when its off.



The 6-leg thing is a problem. I marked the legs but probably is a wrong marking.
1 - Ctrl - Control leg. When we push the play button when the player is off, on this leg we have 3.3V signal and it sustain until player goes off.
2 - GND
3 - Out- When the signal on leg 1 is 3.3 we have 3.3 on this leg. It is a main power supply for the Motorola. It sould be stable 3.3V. If its 3.6+ Motorola starting to crazy or not fire at all. Only bootloader. If it's less then 3V HDD will interrupt while attempt to buffer a song and the back light of the screen starts blinking.
4 - In - source leg. From the battery +.
5 - - when player is on it has 1.6V normal 0. Don't know if it changes with the battery voltage drops.
6 - GND

So I thing that this little thing is a remote controlled stabilizer for 3.3v out. It can be also a pair of transistor. On is a main switch to turn on the power and the second one is for a 3.3v stabilization of the output.

If any of You know what this thing is pleas let me know. Marking on the think are: LTXQ on the up and 3G31 on the down side.

[Chronon]

According to this thread at misticriver, it is a Linear Technology LTC3405.

[Wacholek]

Think You very very much. I already ordered several of those DC-DC converters.

[Chronon]

Great!  Let us know how you get on with your repair.   

[Wacholek]

I will certainly do that. Waiting for the package from Linear Technology  with the samples. I hope the will send it to me. With Maxim didn't had problems.

By the way. Could some one compile for me the latest build to work with the DS3231 RTC? Unfortunately my programing skills are much below average. Specially when it is not a C or Assembler.

[AlexP]

Specially when it is not a C or Assembler.

Good news for you then, Rockbox is written in C, with little bits of Assembler here and there .  If you are capable of coding, then compiling is trivial - rockboxdev.sh in the tools folder in the source will build the cross-compilers for you.  See http://www.rockbox.org/wiki/DevelopmentGuide

[Wacholek]

Repair is done. Every think works perfect. Player stays cold and power consumption is on normal level. I've also done RTC mod but without program patch. This will take me a lot more time then the hardware part. Hate programing...

P.S. I can't complete cygwin installation because when I enter the: http://download.rockbox.org/cygwin/ installation program says that it can't read setup.ini.cig
VMWare is to heavy for me now(internet limit) so i unfortunately have to wait some time

[Chronon]

Repair is done. Every think works perfect. Player stays cold and power consumption is on normal level. I've also done RTC mod but without program patch. This will take me a lot more time then the hardware part. Hate programing...

Fantastic!  Thank you for reporting your success! 

P.S. I can't complete cygwin installation because when I enter the: http://download.rockbox.org/cygwin/ installation program says that it can't read setup.ini.cig
VMWare is to heavy for me now(internet limit) so i unfortunately have to wait some time

It sounds like you aren't running "Setup.exe -X" to disable signature checking -- as mentioned in http://www.rockbox.org/wiki/CygwinInstallWithScreenShots

You can start a new topic in the "Getting Started" forum if you need more help with setting up a Cygwin environment.

[Wacholek]

Every think went well. RTC mod done and compilation also.
Every one who have/had the same problem with the power supply visit this page: http://www.linear.com/pc/productDetail.jsp?navId=H0,C1,C1003,C1042,C1032,C1064,P1587 and order free samples. They shipping them for free at least in all over the Europa and USA.

P.S. After rapier my 5 years old battery least for 16 hour of playing (15h54m Top running time) instead of 9 before.
Now i preparing  for CF mod. Did you know if the 16GB A-Data speedy (80x) CF card will work with no problems?

[Chronon]

Thanks for the info.  I had a little time so I updated
http://www.rockbox.org/wiki/IriverHardwareComponents#Micropower_Synchronous_Buck_Boos
with the link to the order page.

[Wacholek]

Thats great. You can also add my photos if You like.

[Chronon]

I ran out of time.  You are free to edit the wiki if you wish.