Nokia 3155i Troubleshooting Manual page 25
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Also See for 3155i:
- User manual (94 pages) ,
- Rf description and troubleshooting (68 pages) ,
- Service tools (22 pages)
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3155/3155i (RM-41), 3152 (RM-61)
Nokia Customer Care
Baseband Description and Troubleshooting
Rset (33 Ohms)
Vout (~12V)
Klight (~Vbat)
Keypad LEDs
Klight
LED Driver
Enable
Vbats
Rest for keypad LEDs
Figure 23: Keypad Backlight Chip and Diagram
©2005 Nokia Corporation
ISSUE 1 07/2005
Company Confidential
Page 25
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Troubleshooting
