GH688,GA628, Standard Electrical Repairs
4/00021-2/FEA 209 544/1.G 59 (112)
• If the resistance is ~0 ohms at least one of them is shorted out. The simplest way
of finding out which one of them is shorted out is by looking underneath the
LED like in fig. 9.5. You can usually see dirt beneath the LED that is causing the
short circuit.
* If you can’t see anything like that, remove the LEDs in the following order;
H654, H651, H653 and finally H652. Measure the resistance after removing a
LED. When the resistance increases it means that the faulty LED is removed.
Mount new LEDs where you have removed the old ones.
Fig. 9.5
• If the resistance of the LEDs is high, make sure that there is VBATT voltage at
the marked side of the LEDs (fig. 9.1).
* If VBATT is missing it most likely means that the phone is liquid damaged.
If VBATT is correct, check that R612 (~0 ohms, class A), R610 (~27 ohms,
class A) and R606 (~0 ohms, class A) are properly mounted and that they
have the correct resistance (all in fig. 9.6).
Fig. 9.6
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