Nokia 6310i Service Manual page 92

NPL-1
3 - Audio System
:KHQ EX]]HU 'LJ(QD
7KH EX]]HU GXW\ F\FOH LV GHILQHG E\
=
Duty Cycle
9LEUD VSHFLILFDWLRQ
$ YLEUD DOHUWLQJ GHYLFH LV XVHG WR JHQHUDWH D YLEUDWLRQ VLJQDO IRU DQ LQFRPLQJ FDOO 7KH
YLEUD LV SODFHG LQ WKH WRS RI WKH SKRQH ,W LV IDVWHQHG WR WKH $FRYHU E\ PHDQV RI D UXEEHU
JDVNHW DQG D OLG ZKLFK DUH SUHVVHG LQWR WKH $FRYHU VHH 
7KH YLEUD LV HOHFWULFDOO\ FRQQHFWHG WR WKH 3:% E\ VSULQJ FRQWDFWV
7KH YLEUD LV FRQWUROOHG IURP WKH 8(0 E\ D 3:0 3XOVH :LGWK 0RGXODWHG VTXDUH ZDYH
VLJQDO
9LEUDWRU (OHFWULFDO ,QWHUIDFH
7KH GULYHU FLUFXLW LV DQ LQWHJUDO SDUW RI WKH 8(0
7KH WZR  Q+ LQGXFWRUV DUH DGGHG IRU GHFRXSOLQJ WKH YLEUD PRWRU IURP WKH 5) DQWHQQD
ILHOG 7KH WZR  Q) FDSDFLWRUV DUH SODFHG IRU (6' SXUSRVHV
UEM
Vibraclk
9LEUD HOHFWULFDO VSHFLILFDWLRQV
2SHUDWLQJ YROWDJH
6WDUWLQJ &XUUHQW
6WDUWLQJ YROWDJH
7HUPLQDO 5HVLVWDQFH
&RLO  X+ W\SLFDO
7\SLFDO USP  DW  9'&
3DJH 
 WKHQ D 3:0 VLJQDO LV SUHVHQW DW %8==3:0
BPWMDCR 5 ( 0 : * ) . 0
5kOhm
+/- 35%
Figure 14. Vibra driver circuit
 9 ¤  9'& &RQWUROOHG E\ WKH 'XW\ F\FOH
PD[  P$
PD[  9'&
 2KP W\SLFDO
1RNLD &RUSRUDWLRQ
PAMS Technical Documentation
78125 %
1 uF
VBATDriv
Vibra
33nH
VIBRA
10 nF
VSADriv2
VBAT
33nH
M
1 nF
,VVXH  $SULO