GH688,GA628, Standard Electrical Repairs
4/00021-2/FEA 209 544/1.G 34 (112)
Fig. 5.7
Fig. 5.8
All of the values approximately 0.2V.
• If any of the values differ, measure the resistance of C633 (class A, >100 kohms,
fig. 5.10) and C824 (class A, >25 kohms, fig. 5.8).
* If any of the resistances are too low, replace the corresponding capacitor.
* If the resistances and VRPAD are correct, replace the diode.
* If the voltages (except VRPAD) at the diode are still incorrect after
replacing it, check the soldering at D600 pad 96. If it’s correct, replace
C636 (class A, fig. 5.8).
* If VRPAD is incorrect, proceed to chapter 3 (“Doesn´t start”-fault).
Make sure that the voltage VLCD (~5.4V) is at H624 pad 1.
• If it’s not, check the resistances from H624 pad 1 to V615 pin 2 (~0 ohms) and
from H624 pad 2 to ground (~0 ohms).
* If any of the resistances are too high there is a foil damage and the phone
should be discarded.
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