4. TROUBLE SHOOTING
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4.18.2 Voice and Sound Path for Head_set
Voice and Multimedia Sound path for Head_Set as below:
MSM6250A HPH_R, HPH_L -> CN500 pin 17,18 for SUB b’d -> FB901, FB902 in SUB b’d ->
C907,C911 in SUB b’d -> CN901 headset Jack pin 4,5 in SUB b’d
Start
The sine wave appear at
CN500 pin 17,18 ?
Change the Main board
NO
Connect the phone to network
Equipment and setup call
Setup 1KHz tone out
And insert head_Set
The sine wave appear at
C907,C911 in SUB b'd?
YES
Check the connector pin
or change the SUB b'd
NO
Can you hear the tone?
NO
YES
YES
END
Headset insertion detection
in the Main LCD Display OK?
Check CN901 pin 6 or
Change the SUB b'd
NO
YES
Check the CN901
or change the SUB b'd
Содержание U890
Страница 1: ...Date April 2006 Issue 1 0 Service Manual Model U890 U890c Service Manual U890 U890c ...
Страница 3: ... 4 ...
Страница 20: ...3 TECHNICAL BRIEF 21 ...
Страница 46: ...3 TECHNICAL BRIEF 47 Figure PM6650 2 Functional Block Diagram ...
Страница 70: ...4 TROUBLE SHOOTING 71 4 2 SIGNAL PATH ...
Страница 109: ...4 TROUBLE SHOOTING 110 CN600 50pin LCD connector CN901 C907 C911 FB901 FB902 ...
Страница 115: ...4 TROUBLE SHOOTING 116 C226 C227 for MIC serial capacitor ...
Страница 118: ...4 TROUBLE SHOOTING 119 Q400 Q401 Q402 VBATT GND ...
Страница 139: ...Table 2 1 1 RF Block Component 6 BLOCK DIAGRAM 140 ...
Страница 140: ...6 BLOCK DIAGRAM 141 6 2 Interface Diagram U890 Interface Diagram ...
Страница 142: ...6 BLOCK DIAGRAM 143 Top Side ...
Страница 143: ...6 BLOCK DIAGRAM 144 Bottom Side ...
Страница 152: ... 153 8 pcb layout ...
Страница 153: ... 154 8 pcb layout ...
Страница 154: ... 155 8 pcb layout ...
Страница 155: ... 156 8 pcb layout ...
Страница 156: ... 157 8 pcb layout ...
Страница 157: ... 158 8 pcb layout ...
Страница 163: ...9 CALIBRATION 164 9 3 HOT KIMCHI Example Choose_U890 ...
Страница 164: ...9 CALIBRATION 165 Click APPLY button Click START button ...
Страница 165: ...9 CALIBRATION 166 Click Run button to lunch RF AUTOTEST ...
Страница 167: ... 168 ...
Страница 191: ...Note ...
Страница 192: ...Note ...