Display; Display Troubleshooting - Nokia 6275 Baseband Description And Troubleshooting

Nokia Customer Care

Display

The Nokia 6275/6275i has a large 320x240 QVGA display with 262k colors. This display is
controlled by the D2800 through a parallel interface and powered by UEMEK using VIO
and VFlash1. An ESD ASIP next to the flex connector protects against ESD.

Display Troubleshooting

When troubleshooting the display, refer to
1. Check that the display is connected properly and is making good contact with
LCD connector.
2. If there is no display but the backlight is on, check the ESD ASIP for shorts and
cracks.
3. Check the power supply VIO, VFlash1, and VLCD. If they are not correct, check the
UEMEK or VLCD regulator.
4. If there is no backlight and no display, check the board-to-board connector.
5. Check the activity on the LCD test points. If there's no activity, check or replace
the D2800.
6. Ensure that the DIF Clk is 9.6MHz.
Issue 1 - September 2006
Baseband Description and Troubleshooting
Figure 32
Figure 32: Display test points and chart
Company Confidential
6275/6275i (RM-154)
and perform the following:
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