Keypad; Display - Nokia 7088 Troubleshooting Manual
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Also See for 7088:
- User manual (94 pages) ,
- Troubleshooting manual (18 pages) ,
- Disassembly/assembly (9 pages)
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Keypad
The mobile terminal uses six blue light-emitting diodes (LEDs) for keypad illumination.
MSM GPIO42 is used to turn on/off these LEDs.
MSM uses GPIO57 ~ GPIO66 (KYPD_0, KYPD_1, KYPD_3, ~ KYPD_17) to do
keypad scan function.
Display
The mobile terminal LCD is 128*160 dot matrix transmissive color TFT LCD.
The LCD module contains three serial white LEDs for LCD backlight. LEDs are
driven by a booster (U12). The enable/disable of booster is controlled by
BACKLIGHT_EN signal. BACKLIGHT_ADJ signal driven by MSM is used for
adjustment of LEDs luminance.
Issue 1 12/2006
© 2006 Nokia Corporation
Figure 17: LCD Module Block Diagram
Baseband Description and Troubleshooting
Company Confidential
7088 (Flower)
Page 21
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