Siemens S45 Service Manual page 15

The displays will be shipped as complete modules from the suppliers. The design consists
of the LCD-cell with a Tape Chip Carrier foil (TCP) and the lightguide. The LEDs for the
backlight will be placed on the K45 PCB.
The display controllers will be driven with a supply voltage of VDD = 2.65V.
For the display module the 4 side-shooter LEDs are mounted on the K45 PCB. The LED
colour is amber with a typical wavelength of 590nm. The maximum current per LED will be
about 5mA. Different LED types are under evaluation. The luminance is targeted to be ≈1.5
cd/ m² with homogeneity fluctuations of max. ≈25%. The luminance will be comparable to
the C25 backlight. The S45 Backlight will be better than the S35.
The Display module is connected to the board by a flexible cable which is inserted into a
socket connector. In case the display is defective electrically or mechanically it can be
exchanged easily.
In opposite to the MMI board of other phones (e.g. S6 and E10) the Speaker/Receiver is
not soldered to the board, but is mechanically fixed on to the Upper housing and electrically
connected to the board by the Speaker's spring.
To be able to do measurements on and software update of the telephone, an adapter cable
between Molex- and Lumberg connector will be available. See photos in Additional Tools of
Chapter 3.
S45/ME45 comes with an integrated antenna and it is built-in to the back of the lower
housing.
The dust protection frame and the display window are included in the display module.
IrDA
Low-Power infrared data interface, compatible to "IrDA - Infrared Data Association; Serial
Infrared Physical Layer Specification, Version 1.3", supporting transmission rates up to
115.2kbps (slow IRDA). As a Low-Power-Device, the infrared data interface has a
transmission range of
- 20cm to other Low-Power-Devices and
- 30cm to Standard-Devices
The viewing angle is +/-15° (resulting in 30° viewing cone).
The transmitting diode fulfils the requirements of IEC825-1 Class 1M Eye-Safety.
SIM
SIM cards with supply voltages of 1.8V and 3V are supported.
Vibration Motor
The vibration motor is mounted in the lower case. The electrical connection to the PCB is
realised with pressure contacts.