Service manual

During charging the Whitecap will monitor the thermister line and the BATT
Sense line through A/D convertor within GCAP-II. The thermister is inside the
battery and indicates its temperature during charging. The temperature of the
battery defines the end of battery charge cycle in some cases and must be
monitored continuously during charging.
The energy flows along the dashed wider line from EXT_B+ to BATT+ as
above diagram indicated.
7. 5 LCD module
1. Overview
Taichi LCD module is assembled by Touch panel, LCD panel and EL panel. LCD
panel is a 320X240 pixels with transflective display film,STN type LCD. The driving
signals for Touch panel, LCD and EL come from Taichi main board and LCD power
circuit PCB. See figure 1.
Fig.1 LCD module electrical block diagram
Column driver IC (320 outputs)
Row driver IC
(120 outputs)
Row driver IC
(120 outputs)
Touch screen
1/4 VGA
resolution LCD
EL panel
Touch screen control lines
- Right, Top, Left, Bottom
Control lines
- Disp, Loadse, Loadco, Dfseg, Dfcom,
Frame, CP
EL control lines
- EL (GND), EL (+)
Data lines
- D0, D1, D2, D3
Power lines
VD1, VD2, VM, VS12, Vdd, Vcc, Vss
2. Driving signal for LCD panel
2.1 LCD panel electrical block
LCD panel is driven by signals come from Dragonball microprocessor and LCD
power circuit PCB. LCD controller in Dragonball generates LCD logical control
signal and display data. Power circuit PCB is used to generate LCD operating voltage
and temperature compensation. It also controls power management for the PCB and
LCD common&segment drivers. See Figure 2.