Display; How The Display Works; Display Troubleshooting - Nokia 6265 Baseband Description And Troubleshooting

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Display

How the Display Works

Nokia 6265/6265i/6268 has a large 262k color 2.2 inch QVGA display (320 x 240),
controlled by the D2800 engine through a parallel interface. The display is protected
against ESD through a ESD ASIP next to the flex connector. The display backlight uses 4
LED in series power by external LED driver.

Display Troubleshooting

When troubleshooting the display, make these common checks (see
• Check that the display is connected properly and is making good contact with
LCD connector. If there is no display, but the backlight is on, check ESD ASIP for
shorts and cracks.
• Check the power supply VIO, VFlash1 and VLCD. If not correct, check the UEMEK
or VLCD regulator.
• If there is no backlight and no display, check the board-to-board connector
• Check the activity on the LCD test points. If no activity, check or replace D2800.
• Check that the DIF CLk is 9.6MHz
Issue 1 11/2005
Figure 25: Nokia 6265/6265i/6268 display
©2005 Nokia Corporation
6265/6265i/6268 (RM-66)
Baseband Description and Troubleshooting
Company Confidential
Figure 26):
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