GH688,GA628, Standard Electrical Repairs
4/00021-2/FEA 209 544/1.G 56 (112)
Fig. 9.1a
Fig. 9.1b
Make sure the buzzer, H600 (class A, fig. 9.1a) is properly soldered.
• If solderings are correct, replace the buzzer. Assemble the phone and test the
buzzer again according to 9.1.
* If the problem is solved, send the phone through the usual flow.
If the fault remains, disassemble the phone. Give the board power and start it up.
Measure the voltage at H600 pad 1 (~3.3V, fig. 9.2).
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