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* If the resistance is too low, replace components in the following order:
C903 (fig. 4.6), C904 (fig. 4.6), C905 (fig. 4.6), R727 (fig. 4.1) and D900 (fig.
4.6, all of class A). Check the resistance from VDSPC to ground after every
component replaced.
* If the resistance is correct, replace V703 (class A, fig. 4.1).
If all the feed voltages are correct, check the solderings of D600 (fig. 4.4), D900
(fig. 4.6) and N800 (fig. 4.2).
• If they're correct, replace D900 (class A, fig. 4.6). If that doesn't help, replace
D600 (class B, fig. 4.4).
If the fault remains, send the phone to the next level.
4.9 Music mute fault.
Check the contact pads at the system connector for dirt, liquid damages and oxida-
tion. Replace the system connector if needed.
Open the phone and check for liquid damages, especially around the system connec-
tor pads.
Check the soldering at D600 pin 69 (fig. 4.4).
Measure the resistance of R602 (~470 ohms, class A, fig. 4.1).
Measure the resistance from MUTE (fig. 4.5) to ground (>100 kohms).
• If it's less, replace F606 (class A, fig. 4.1).
• If it's correct, replace D600 (class B, fig. 4.4).
If the fault remains, send the phone to the next level.
4/00021-2/FEA 209 544/3.D
SH888, S868, Standare Electrical Repair
Fig. 4.6
23
(66)
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