User Guide

CCS Technical Documentation 7 - Troubleshooting Instructions
RH-26
Issue 1 02/04 ©Nokia Corporation Page 29
Figure 7: SIM signals at start-up with 3V SIM card
Display
Display is a 130 * 130 dot LCD display with 4096 colors.The illumination is accomplished
with 3 LEDs integrated into the LCD module as well as the display drivers mounted on
the flex. Serial data transfer begins when UPP drives the CSX pin low and starts by set-
ting bits to SDA. The bits are read by the display on the rising edge of SCLK. RESX
GENIO(4) line is normally 1.8 V.
There are no serviceable components in the LCD module, the whole module must be
changed in fault situation.
If change does not help, check:
1 Signals at test points should be like in Figure: LCD Signals.
2 Series resistors R301,R302 and R303.
3 Connector contacts and solderings.
Figure 8: LCD test points.