Ericsson GH 688 Trouble-Shooting Instruction page 33

GH688,GA628, Standard Electrical Repairs
Fig. 5.5
If the problem isn't solved, send the phone to the next level.
Applies for KRC 114 279 (Seiko display):
• Make sure that there VLCD (~-2.8V) voltage at H622 pad 5 (fig. 5.5).
* If there is no, check the resistances from H622 pad 5 to V611 pin 2 (~0
ohms) and from H622 pad 3 to ground (~0 ohms).
* If any of the resistances are too high there is a foil damage and the phone
is to be discarded.
If the problem isn't solved, proceed to section 5.4 (KRC 114 279).
GA 628
The front side of the circuit board is shown in fig. 5.7.
Measure the voltages at the V615 (class A) diode. Compare the measurement to the
values in fig. 5.8.
4/00021-2/FEA 209 544/1.G
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