Mmi Functions; Acoustics; Vibra - Siemens A35 Repair Documentation

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8. MMI-Functions

Electro-Acoustic components are:

The VIBRA is activated and controlled from the EGOLD+

via the signal, VIBRA_ON. For this the VIBRA is connected to XG230 with BATT+.

GND is given by the shielding of the RF-Part. With a "H" of the VIBRA_ON signal

the transistor V230 is switched on. The signal

EGOLD+

(Miscellaneous M6).

due to a higher voltage required from the VIBRA in the beginning. The diode

is used to protect the circuit against over voltage and switching spikes.

timing of VIBRA_ON signal

V1.0

A35-A36-A40

a) VIBRA

b) Microphone

c) Loudspeaker

VIBRA_ON

This "second" VIBRA_ON is only used for ~40 to 65ms

Page 32 of 38

Company Confidential

(Miscellaneous E10)

appears also at the

V231

EGOLD+

Notes

ICM MP CC ST

09/01

Table of Contents

A36 A40