Pantech PG-1810, Руководство по обслуживанию

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PG-1810 Service Manual
PANTECH R&D CONFIDENTIAL
32
6.2.2 Melody or MP3 is not ringing
1. Check to see U117.D7, E1, J3 are 1.8V : CP 111
NO Check to see U201 or U114 cold solder,broken,short to the other PCB pattern or not
If you find out any defect, you replace it
2. Check to see L102, U302.C8 pin is Vbatt and C1, E8, H3 pin, CC106 are 2.8V : CP 112
NO Check to see U201 and U302 cold solder,broken,short to the other PCB pattern or not
If you find out any defect, you replace it
3. Check to see U117.E2 pin’s input Clock (26MHz) : CP113
NO Check to see U116 and U307 cold solder, broken,short to the other PCB pattern or not
If you find out any defect, you replace it
4. Check to see U117.B6, A65 pin’s output and C164, C166 ( 20 ~ 2000Hz ) : CP114
NO Check to see U117 cold solder, broken,short to the other PCB pattern or Not.
If you find out any defect, you replace it
5. Check to see U107 and U108.A1, B3 pin’s output ( 20 ~ 2000Hz ) : CP115
NO Check to see U107 and U108 cold solder, broken,short to the other PCB pattern or Not.
If you find out any defect, you replace it
6. Check to listen to sound : CP116
NO Check to see Speaker cold solder, broken,short to the other PCB pattern or Not.
CP112
CP113
CP114