Nokia RH-109 Service Manual page 34

RH-109
BB Troubleshooting and Manual Tuning Guide
Placement......................................................................................................................................................................3-4
Placement-Main Bottom...........................................................................................................................................3-4
Placement-Main Top..................................................................................................................................................3-5
Placement-Sub..........................................................................................................................................................3-6
Circuit.............................................................................................................................................................................3-7
Circuit- QSC6055 interface........................................................................................................................................3-7
Circuit-QSC6055 memory and LCD interface............................................................................................................3-7
Circuit-QSC6055 power output.................................................................................................................................3-8
Circuit-QSC6055 charge.............................................................................................................................................3-8
Circuit-QSC6055 peripheral interface.......................................................................................................................3-9
Circuit-Acoustic interface.........................................................................................................................................3-10
Circuit-S/B interface..................................................................................................................................................3-11
Trouble Shooting for BB part.......................................................................................................................................3-12
Initialization..............................................................................................................................................................3-14
Keypad LED................................................................................................................................................................3-15
LCD BL.........................................................................................................................................................................3-16
Vibrator......................................................................................................................................................................3-18
Speaker......................................................................................................................................................................3-20
Headset......................................................................................................................................................................3-22
Mic..............................................................................................................................................................................3-23
USB.............................................................................................................................................................................3-24
Charging....................................................................................................................................................................3-26
Auto Booting.............................................................................................................................................................3-28
Flashlight function....................................................................................................................................................3-29
List of Tables
Table 1 Power-on circuit performance specifications................................................................................................3-14
List of Figures
Figure 2 High-level power sequences timing diagram..............................................................................................3-14
Figure 3 Backlight control table...................................................................................................................................3-16
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