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* If they are correct and the resistance from DCIO to VBATT still is too high
there's a foil damage and the phone is to be discarded.
Give the board power and start it up by grounding pin 6 of N450 (fig. 6.1).
• If it doesn't start, replace V401 (class A, fig. 6.2). If that doesn't help, replace
V704 (class A, fig 6.1).
After every repair of the charging function, you have to verify the function using the
method mentioned in section 6.1.1.
If the fault remains, send the phone to the next level.
6.4
Starts, but doesn't charge although it indi-
cates charging.
Open the phone and check for liquid damages. Make sure the system connector pads
aren't burnt and that there isn't oxide on them, especially GND (pad 10, fig. 6.1).
Measure the resistance from DCIO to VBATT (~390 ohms, fig. 6.1).
• If the resistance is too high, measure the resistance of R421 (class B, ~0.1 ohms)
and R411 (class A, ~390 ohms, both fig. 6.2).
* If they are correct there's a foil damage and the phone is to be discarded.
After every repair of the charging function, you have to verify the function using the
method mentioned in section 6.1.1.
If the fault remains, send the phone to the next level.
4/00021-2/FEA 209 544/3.D
SH888, S868, Standare Electrical Repair
30
(66)
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