GH688,GA628, Standard Electrical Repairs
4/00021-2/FEA 209 544/1.G 16 (112)
Start the phone using the On/Off-key and check the current consumption.
• If the phone doesn’t consume any current at all when the On/Off-key is
pressed it is most likely liquid damaged. Open the phone and check this. Also
check that the keyboard and the keyboard pads are functional and clean.
• If the phone consumes more than 200mA, remove the display elastomer and try
again.
* If the consumption is reduced it was probably the elastomer or the display.
* If the consumption is just as high as before, proceed to section 3.4.3.
• If the phone consumes ~60mA (average, varies), the battery indicator blinks
once or twice and then the phone turns itself off, then it’s probably X820 (the
pads to the volume flex film, fig. 3.5) or the volume flex film (J820) that is
shorted out. Replace the flex film and if that doesn’t work, proceed to section
3.2.
* If the same phenomena arises without the On/Off-key being pressed it
means that V704 is broken (fig. 3.2).
Fig. 3.5
• If the phone consumes 1-200mA, starts (asks for SIM/searches for the
net…etc…) and works as long as you keep the On/Off-key pressed, proceed to
section 3.4.4.
• If the phone doesn’t start, try to program it in the flash programmer.
* If it doesn’t start in the flash programmer, proceed to section 3.4.1
* If you are able to program the phone in the flash programmer but it doesn’t
start afterwards or if it is troublesome when trying to program it, proceed to
section 3.4.2.
* If the phone starts after programming it in the flash-programmer then the
problem is probably solved, but to eliminate intermittent errors check the cir-
cuit board for liquid damage or faulty solderings on D600, D610 and D620
(fig. 3.2).
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