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Go Back   GSM-Forum > GSM & CDMA Phones / Tablets Software & Hardware Area > Nokia > Nokia Hardware & Hardware Repair

Nokia Hardware & Hardware Repair all what you need for Hardware Repairing for Nokia Phones. Before writing any thread here try to check the Frequently Asked Questions Section.

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Old 04-18-2004, 05:15   #1 (permalink)
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Lightbulb B200 problem


Can we remove B200 from nokia 3310 and is still working?
i try this method and the phone is still runing of course slow ringtone but it work fine and able to flash and power on
Why if phone is dead we replace it to power on again?
what is the function of B200 " in case the phone is dead " ?
Thanks
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Old 04-19-2004, 19:50   #2 (permalink)
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B200 is the " sleep mode clocker " of the phone it works at the time of no use of the phone for data refreshment rithm but at lower speed ( for energy saving ), If U read any full service manuall ( specially the baseband section ) U'll find it well explained , also U have to do further searshing on the forum if U still need additional infos.

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Br
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Old 04-19-2004, 21:32   #3 (permalink)
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It is clock for your CCONT
once you put battery, then it use 2 gates of CCONT to work for 32.768khz !
when phone into "sleep" mode, then 26Mhz also sleep ! phone need 32.768K to keep a clock to work for wake up MCU !

see, it is NEEDED !

regards

Willy
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Old 04-20-2004, 06:27   #4 (permalink)
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Red face Thanks

Thanks for information Medz and Willy
that mean the MCU wake up "work" from B200
in case of phone off what is the function of it to power the phone or not
in case of B200 existing the phone power on
in case of B200 remove the phone power on
what is the difference?
thanks for help
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Old 04-20-2004, 06:43   #5 (permalink)
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Try to use 3310 without 32kHz quartz - you will get no only slow tones, but also jumping network, and also other (de)effects ...
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Old 04-20-2004, 06:51   #6 (permalink)
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Red face

I know slow ringtons and network problem is exist by remove B200
but it does not effect the power on behavior the phone is still power on
but i ask in many service manual and also in forum if the phone is not power on it is one of the problem "B200"
Why?
Thanks for reply
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