Nokia RM-555 Service Manual page 70

Signal Regulator
name
LEDOUT TK65604
QWERTY_L NJOY_0
ED1 /
QWERTY_L
ED2 /
USBC_LED
SEND_END NJOY_1
_LED /
MENU_LED
VBAT
FLASH_LE AS3645A/
D+ LM3555
Indicator_ AS3645A/
LED+ LM3555
VCORE_eM BH30SA2
MC
VIO_eMMC BH18SA2
Page 3 –12
Sleep Idle
OFF
OFF
OFF
OFF OFF
OFF OFF
OFF OFF
OFF OFF
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Copyright © 2009 Nokia. All rights reserved.
BB Troubleshooting and Manual Tuning Guide
Nominal Main user
voltage
Display
backlights
QWERTY key
LED, USB
charging
indicator
Menu key, Send/
End key
3.7
6.68 Camera flash
1.8 Video indicator
3.0 eMMC core
1.8 eMMC IO
RM-555
Notes Supply
VBAT
VBAT
VBAT
VBAT
VBAT
VBAT
VBAT
Issue 1