C905 vibrating alert - GSM-Forum

gerdzio · 03-14-2010, 12:02

Hi everyone

I have se c905 and the vibrating alert is not working.
Do you know how to fix it?
Exchange the vibrator or?

pavithra_uk · 03-14-2010, 14:59

check contact of vibrator. remove vibrator and test it with 3V (two AA battery or phone battery)

gerdzio · 03-14-2010, 20:17

Quote:

Originally Posted by pavithra_uk

check contact of vibrator. remove vibrator and test it with 3V (two AA battery or phone battery)

The motor is working. Tested with phone cell.
But overall vibrating alert is not working. What's wrong?

gerdzio · 03-14-2010, 22:12

Now, when I turn on the mobile it vibrates which is good. But the lcd display has broke...Will replace the lcd and post the result.

Thanks

pavithra_uk · 03-15-2010, 09:24

Quote:

Originally Posted by gerdzio

Now, when I turn on the mobile it vibrates which is good. But the lcd display has broke...Will replace the lcd and post the result.

Thanks

is your LCD damaged ? otherwise it may be software fault. (like K850 BROD)

gerdzio · 03-16-2010, 16:22

Quote:

Originally Posted by pavithra_uk

is your LCD damaged ? otherwise it may be software fault. (like K850 BROD)

Hi
Replaced lcd but the problem still persists. When turn on the mobile it looks like the display is very dark.

gerdzio · 03-17-2010, 17:29

Reflashed the phone and lcd display is still too dark. I found that ther might be sth wrong with the coil beside battery.

pavithra_uk · 03-18-2010, 17:12

Quote:

Originally Posted by gerdzio

Reflashed the phone and lcd display is still too dark. I found that ther might be sth wrong with the coil beside battery.

CHECK MAIN FLEX, IF FLEX DAMAGED BACKLIGHT WILL NOT WORK.

ALSO CHECK

LCD CONNECTOR
CHECK LCD BACKLIGHT LED DRIVER.

did you heared startup sound ?

gerdzio · 03-19-2010, 01:02

Quote:

Originally Posted by pavithra_uk

CHECK MAIN FLEX, IF FLEX DAMAGED BACKLIGHT WILL NOT WORK.

ALSO CHECK

LCD CONNECTOR
CHECK LCD BACKLIGHT LED DRIVER.

did you heared startup sound ?

No, I haven't heard any sound. You think that's the flex(but which one?-the one that goes from keypad membrane to the main board.
I've already checked the flex that goes from keypad to the top of the phone.

So maybe that flex that goes to the board.
Lcd connector is good, I have no doubt.
LED Driver?

Thank you for support

gerdzio · 03-19-2010, 01:42

Maybe that's faulty Sony Ericsson C905 LCD flex ribbon

pavithra_uk · 03-19-2010, 16:30

Quote:

Originally Posted by gerdzio

No, I haven't heard any sound. You think that's the flex(but which one?-the one that goes from keypad membrane to the main board.
I've already checked the flex that goes from keypad to the top of the phone.

So maybe that flex that goes to the board.
Lcd connector is good, I have no doubt.
LED Driver?

Thank you for support

hey, check main flex cable (connect with main board)

check TP4200 voltage (V4201 anode voltage) it must be lager than battery voltage. may be 12~16V

If you didn't hear startup sounds, I suspect phone may not turn on correctly. what happens if it connect to computer?

gerdzio · 03-20-2010, 10:58

Quote:

Originally Posted by pavithra_uk

hey, check main flex cable (connect with main board)

check TP4200 voltage (V4201 anode voltage) it must be lager than battery voltage. may be 12~16V

If you didn't hear startup sounds, I suspect phone may not turn on correctly. what happens if it connect to computer?

Hi
I ordered the flex that goes to the main board and see what happens.
I flashed the mobile so detects fine.
Thank you for help

pavithra_uk · 03-20-2010, 12:26

Quote:

Originally Posted by gerdzio

Hi
I ordered the flex that goes to the main board and see what happens.
I flashed the mobile so detects fine.
Thank you for help

also check LED driver output voltage as I given above post. do you have a schematic of C905?

gerdzio · 03-22-2010, 19:46

Quote:

Originally Posted by pavithra_uk

also check LED driver output voltage as I given above post. do you have a schematic of C905?

Hi
I replaced the Flex but the screen is still dark.
Just bought the c905 faulty one so I'll replace the whole mobo.

pavithra_uk · 03-23-2010, 05:45

Quote:

Originally Posted by gerdzio

Hi
I replaced the Flex but the screen is still dark.
Just bought the c905 faulty one so I'll replace the whole mobo.

C905 is one of the SE's worse phone ever made. every phone had its own fault.

replace whole mobile if you can. or if can find another C905, you can check your motherboard with it. dark screen can cause due to lot of faults

LCD
Upper keypad flex
Main Flex
Motherboard (LED driver etc..)
Software fault (GDFS fault etc..)

did you get new one or used one ?

don't buy this crappy phone again.
In here (SriLanka) new C905 price = 600+US$ and used one going for 200$ or less.

sorry about your phone.

03-14-2010, 12:02	#1 (permalink)
gerdzio No Life Poster Join Date: Mar 2008 Location: Irvinestown Posts: 839 Member: 719399 Status: Offline Thanks Meter: 228	C905 vibrating alert Hi everyone I have se c905 and the vibrating alert is not working. Do you know how to fix it? Exchange the vibrator or?

03-19-2010, 01:42	#10 (permalink)
gerdzio No Life Poster Join Date: Mar 2008 Location: Irvinestown Posts: 839 Member: 719399 Status: Offline Thanks Meter: 228	Maybe that's faulty Sony Ericsson C905 LCD flex ribbon Last edited by gerdzio; 03-19-2010 at 01:49.

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03-14-2010, 14:59	#2 (permalink)
pavithra_uk Freak Poster Join Date: Oct 2009 Location: Sri Lanka Age: 39 Posts: 153 Member: 1142667 Status: Offline Thanks Meter: 16	check contact of vibrator. remove vibrator and test it with 3V (two AA battery or phone battery)

03-14-2010, 22:12	#4 (permalink)
gerdzio No Life Poster Join Date: Mar 2008 Location: Irvinestown Posts: 839 Member: 719399 Status: Offline Thanks Meter: 228	Now, when I turn on the mobile it vibrates which is good. But the lcd display has broke...Will replace the lcd and post the result. Thanks

03-17-2010, 17:29	#7 (permalink)
gerdzio No Life Poster Join Date: Mar 2008 Location: Irvinestown Posts: 839 Member: 719399 Status: Offline Thanks Meter: 228	Reflashed the phone and lcd display is still too dark. I found that ther might be sth wrong with the coil beside battery.