Accessories; Fig 9 Internal Microphone Electrical Interface - Nokia RH-9 Series Ccs Technical Documentation

CCS Technical Documentation
sine driven output from UEM and an external amplifier.
The speaker implementation have two main resonances: 1.8 kHz and 2.9 kHz. The ringer
melodies is optimised for the given response so that the best possible (and loudest possi-
ble) tones will be implemented.
Acoustical wise the back of the speaker is designed to be completely tight, with a well-
defined volume. The volume is kept under control by a semi-adhesive gasket mounted on
the back of the speaker, and the PWB.
A double-adhesive gasket is being used on the front of the speaker to provide sealed
conditions from front to back. In front of the speaker there is a well-defined volume
which connects into the sound-port holes in the D-cover.
The speaker is electrically connected to the PWB by spring contacts (similar to that for
the internal earpiece).
Figure 10: Interface between the MIDI-circuit and the UEM
UEM
HEADINT
10
HF
10
HFCM
UPP
GENIO14

Accessories

Batteries
RH-9 supports Li-Ion batteries.
Issue 1 11/02
External audio interface
1u
10n 10n
Vbat
100k
1u
47k
Vdd
IN-
47k
IN+
BYPASS
1u
SHUTDOWN
GND
Placed near
ãNokia Corporation
System Module & UI
100k
10n 10n
42 ohm / 100 MHz
Vo1
Vo2
42 ohm / 100 MHz
Placed outside
BB-can, near
UEM
SALT
RH-9
INT
XEARP
XEARN
SALT
Interface to
DC-out
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