HARDWARE CONTACT SERVICE (solution) - GSM-Forum

jj008 · 04-05-2002, 09:02

What is the solution for this. Are there any tutorials for this. I have a 3310 with H.W C.S, and i have no idea how to repair it, but i know its possible.

Thanks in advance.

NAS · 04-05-2002, 22:10

first check it with eeprom tools
if it sayes mcu check sum test failed
then this is unrepairable
if any thing else than just heat the ccont and cobba to the point where the solder melts but dont touch it what so ever try to add some flux or paste while heating
note that u need an a smd rework station

Lead · 04-06-2002, 09:07

@NAS:

Quote:

Originally posted by NAS
first check it with eeprom tools
if it sayes mcu check sum test failed
then this is unrepairable

why should this be unrepairable?
just try to reflash the MCU, sometimes more erase-cycles are necessary, but if the flash IC is not completely damaged, you may succeed.

Lead · 04-06-2002, 09:08

@jj008:
Use wintesla or pclocals to run selftests...

hanoon · 04-06-2002, 10:35

sure ur solution will be with wintesla...u must learn where is ur faulty part in ur phone however its software or hardware....

if its hardware it will be in Ccont or Cobba ,,u must first try to rehot them with good liquid flux then its will be ok to repace faulty part if no sucess,,,,,,

good luck!

Hanukkah · 04-06-2002, 16:32

CS might be due to:

CCONT interface
COBBA:
-serial interface
-parallel interface
MCU Checksum
PPM Checksum
Eprom tune checksum

CCONT, COBBA failure just reflow using hot air rework station.
MCU, PPM, and EEPROM tune just flash with corresponding flash files.

Then recalculate faids, or splocks

hacker1gsm · 04-06-2002, 17:55

hi
also can cause by DSP COURRAPT
OR NOT ALIVE
REGARDS

hadari · 04-07-2002, 05:10

Quote:

Originally posted by hadari
hi
flash with a same phone then change imei with knock and unlock with eeprom tools 100% working on 3310 3330 8210 6210 3210
REGARDS

dimka · 04-07-2002, 23:13

Hi all!
I have 8250 in Contact service.
When I'm reading it by M-Bus with NokiaTool it shows:
MCU SW: V 3.18.03-04-01.NSM-3D.(c) NMP.
IMEI: 000000000000000
Original IMEI: 656565656565656
All locks are closed with FF.

I've made one 8210 with similar problem by flashing eeprom area from working phone and updating FAID.

But I can't flash this 8250! I think F-Bus on phone isn't working...
So what parts should I check or rehot?

Hanukkah · 04-08-2002, 01:12

Its possible that the Flash ID of your phone is 08988c2, in this case you will need 956 bytes boot.bin and 6.09KB f_loader for use with Dejan 1.00. Alternatively, you may use Rolis 4.77. Just select your mobile model, and ignore "mobile choosing wrong" message box. It will flash the eprom area of your phone.

q-zar · 11-29-2002, 15:06

Quote:

Originally posted by Hanukkah
Its possible that the Flash ID of your phone is 08988c2, in this case you will need 956 bytes boot.bin and 6.09KB f_loader for use with Dejan 1.00. Alternatively, you may use Rolis 4.77. Just select your mobile model, and ignore "mobile choosing wrong" message box. It will flash the eprom area of your phone.

Problem of my 3210 is contact service.
MCU Eeprom Interface - Failed
Eeprom Tune Checksum - Failed
After calculation of FAID and eeprom checksum still Contact Service.
It can't be flashed... Unknown flash ID...
Any comments?

vule · 11-29-2002, 15:46

Hiya

If u have message: flash type unknovn then is 95 % that flash is phisically damaged or bad soldered. Try to resolder flash or change it.

There is 2 type of CS:

- software ( phone powers itself, reset and show CS ; phone powers itself, reset, show insert simcard, then reset again and show CS )

- hardware ( phone powered, lights only then CS; no reset at all )

For software - reflash mcu, ppm, eeprom and pmm, recalculate checksums, restore imei and ur phone working.

For hardware: cobba, flash or eeprom ( if present physically) can be bad soldered or damaged. Sometimes ccont also can be cause for this. Also there can be other reasons like broken lines on pcb but this is rare case.

BR

Vule

ali-g-string · 03-21-2003, 16:57

I also have an 8850 CS reason eeprom checksu, failed.

Flashed it, but still CS.

Can not get the phone to communicate with eeprom tools ?

phone not connected

Anyone help

themobileking · 03-22-2003, 13:16

In my experience ....If the "contact service " cannot be reapaired through software by flashing the set....then the Audio IC (COBBA) should be replaced.....

this is what we do in our workshops and the problem is solved.After replacing COBBA just calculate FAID...and unlock

Please try and post results here.

Rgds

04-05-2002, 09:02	#1 (permalink)
jj008 No Life Poster Join Date: Jun 2001 Location: London Age: 41 Posts: 503 Member: 5006 Status: Offline Thanks Meter: 2	HARDWARE CONTACT SERVICE (solution) What is the solution for this. Are there any tutorials for this. I have a 3310 with H.W C.S, and i have no idea how to repair it, but i know its possible. Thanks in advance.

04-06-2002, 10:35	#5 (permalink)
hanoon No Life Poster Join Date: Dec 2001 Location: USA Age: 45 Posts: 596 Member: 8051 Status: Offline Thanks Meter: 6	hanoon© sure ur solution will be with wintesla...u must learn where is ur faulty part in ur phone however its software or hardware.... if its hardware it will be in Ccont or Cobba ,,u must first try to rehot them with good liquid flux then its will be ok to repace faulty part if no sucess,,,,,, good luck!

04-07-2002, 23:13	#9 (permalink)
dimka Freak Poster Join Date: Nov 2001 Location: Omsk, Russia Age: 41 Posts: 121 Member: 7337 Status: Offline Thanks Meter: 0	Help! Hi all! I have 8250 in Contact service. When I'm reading it by M-Bus with NokiaTool it shows: MCU SW: V 3.18.03-04-01.NSM-3D.(c) NMP. IMEI: 000000000000000 Original IMEI: 656565656565656 All locks are closed with FF. I've made one 8210 with similar problem by flashing eeprom area from working phone and updating FAID. But I can't flash this 8250! I think F-Bus on phone isn't working... So what parts should I check or rehot?

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04-05-2002, 22:10	#2 (permalink)
NAS Junior Member Join Date: Mar 2002 Posts: 18 Member: 10338 Status: Offline Thanks Meter: 0	first check it with eeprom tools if it sayes mcu check sum test failed then this is unrepairable if any thing else than just heat the ccont and cobba to the point where the solder melts but dont touch it what so ever try to add some flux or paste while heating note that u need an a smd rework station

04-06-2002, 09:08	#4 (permalink)
Lead No Life Poster Join Date: Aug 2008 Age: 52 Posts: 3,292 Member: 1841 Status: Offline Thanks Meter: 469	@jj008: Use wintesla or pclocals to run selftests...

04-06-2002, 16:32	#6 (permalink)
Hanukkah No Life Poster Join Date: Jul 2001 Location: RP Age: 48 Posts: 890 Member: 5246 Status: Offline Thanks Meter: 9	CS might be due to: CCONT interface COBBA: -serial interface -parallel interface MCU Checksum PPM Checksum Eprom tune checksum CCONT, COBBA failure just reflow using hot air rework station. MCU, PPM, and EEPROM tune just flash with corresponding flash files. Then recalculate faids, or splocks

04-06-2002, 17:55	#7 (permalink)
hacker1gsm No Life Poster Join Date: Jul 2001 Location: EGYPT Age: 46 Posts: 966 Member: 5113 Status: Offline Thanks Meter: 10	hi also can cause by DSP COURRAPT OR NOT ALIVE REGARDS

04-08-2002, 01:12	#10 (permalink)
Hanukkah No Life Poster Join Date: Jul 2001 Location: RP Age: 48 Posts: 890 Member: 5246 Status: Offline Thanks Meter: 9	Its possible that the Flash ID of your phone is 08988c2, in this case you will need 956 bytes boot.bin and 6.09KB f_loader for use with Dejan 1.00. Alternatively, you may use Rolis 4.77. Just select your mobile model, and ignore "mobile choosing wrong" message box. It will flash the eprom area of your phone.

11-29-2002, 15:46	#12 (permalink)
vule No Life Poster Join Date: Apr 2002 Location: Radiometer Medical ApSBrønshøj Age: 51 Posts: 721 Member: 10854 Status: Offline Sonork: 1578988 Thanks Meter: 3	Hiya If u have message: flash type unknovn then is 95 % that flash is phisically damaged or bad soldered. Try to resolder flash or change it. There is 2 type of CS: - software ( phone powers itself, reset and show CS ; phone powers itself, reset, show insert simcard, then reset again and show CS ) - hardware ( phone powered, lights only then CS; no reset at all ) For software - reflash mcu, ppm, eeprom and pmm, recalculate checksums, restore imei and ur phone working. For hardware: cobba, flash or eeprom ( if present physically) can be bad soldered or damaged. Sometimes ccont also can be cause for this. Also there can be other reasons like broken lines on pcb but this is rare case. BR Vule

03-21-2003, 16:57	#13 (permalink)
ali-g-string No Life Poster Join Date: Apr 2002 Location: West Midlands, UK Posts: 526 Member: 11099 Status: Offline Thanks Meter: 5	I also have an 8850 CS reason eeprom checksu, failed. Flashed it, but still CS. Can not get the phone to communicate with eeprom tools ? phone not connected Anyone help

03-22-2003, 13:16	#14 (permalink)
themobileking No Life Poster Join Date: Jun 2001 Location: Uranus Age: 53 Posts: 731 Member: 5072 Status: Offline Thanks Meter: 91	In my experience ....If the "contact service " cannot be reapaired through software by flashing the set....then the Audio IC (COBBA) should be replaced..... this is what we do in our workshops and the problem is solved.After replacing COBBA just calculate FAID...and unlock Please try and post results here. Rgds