Display Backlight Troubleshooting - Nokia 6235 Baseband Description And Troubleshooting

6235/6235i/6236i (RM-60)
Baseband Description and Troubleshooting

Display Backlight Troubleshooting

When troubleshooting the display backlight, make these common checks (see
and Figure 30):
• Perform visual inspection of LCD connector and LED Driver circuitry
• If display backlight is not turning on, check VLED +(~10V) and VLED – (~.5V) on
display connector.
• If there, then you can assume the driver is working properly and the LED inside
the display might be bad. Try changing display.
• Check VLED + and VLED – on Display Driver circuitry.
• Check Dlight is enable high (~4V). If not correct, check UEMEK.
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Figure 21: Display Chips and Frequency
©2005 Nokia Corporation
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Figure 29
Issue 1 04/2005