Figure 11 Cannot identify charger
No charging current (cannot charge battery fully in expected time)
When the phone is in constant current or constant voltage charge state, the average charging current is
controlled by phone SW. The current is feed into battery though the V2206 transistor, the phone measures
charging current by sampling the voltage over resistor R2208. If there is something wrong at this path, the
charging current may be out of specification. It is assumed that phone can detect the presence of the charger,
otherwise please refer to the above section.
RM-761; RM-799; RM-800
BB Troubleshooting and Manual Tuning Guide
Page 3 – 14 COMPANY CONFIDENTIAL Issue 1
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