Ericsson T18s Trouble-Shooting Instruction page 50

T18s, T18sc Standard Electrical Repairs
Fig. 9.1
Make sure the buzzer (H600, class A, fig. 9.1) isn't incorrectly soldered at pins 1
and 2.
• If the solderings are correct, replace H600. Try the buzzer (by starting the board
in the fixture).
Give the board power and start it up.
Measure the voltage at pin 3 of V706 and pin 2 of V707 (~4.8V, fig. 9.1).
• If the voltage is correct, replace V706 and V707 (class A).
• If it's incorrect, replace R606 (class A, fig. 9.1).
* If that doesn't help there's a foil damage and the phone is to be discarded.
Check the soldering at pin 91 of D600 (fig. 9.1, 9.2).
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