Motorola V300, V303, V500, V600, V400 Service Manual

Beijing Competency Centre

Beijing MCIC

No.39A Zi Zhu Yuan Road

Beijing

P.R.China

Website: gs.mot.com/cc

	FIELD SERVICE BULLETIN
FSB Number:	BJCCFSB2004 - 129
Author:	Xu Changhong
Date:	8 Jun 2004
Total No. Of Pages:	3
Subject:	Citizen Polyphonic Speaker Issue
Model Affected:	EZX A768
	Triplet GSM V300, V303, V500,V600, V400,V525
	GSM C650 , GSM V80
Level of Repair:	3

Problem

During EZX (A768) MOL analysis no ring tone is highlighted as Top 2 issue in filed return of Apr and May, Most of these failures were found that Loudspeaker damaged with failure mode of open circuit. Supplier (Citizen) F/A report show root cause is the failed forming shape of the coil wire allows a strain concentration result in metal fatigue fracture. Figure 1 illustrate detailed failure mode.

Fig. 1

In addition, this issue also happened on C650 ,V80 and Triplet series products including V300, V303, V500,V600, V400 and V525.

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