3. TECHNICAL BRIEF
- 60 -
3.10.8 Keypad Light
There are 22 blue LEDs on Top side in board backlight circuit, which are driven by
KEYBD_BACKLIGHT line form PM6650(note, one LED is not mounted).
Key Pad backlight controlled by PM6650.
Figure 3.10.8-1 Keypad Backlight Circuit
KEY_BACK_LIGHT
R650
47
R656
47
LD610
LEBB-S14H
LEBB-S14H
LD609
R658
47
LEBB-S14H
LD615
LD613
EVL14K02200
VA606
LEBB-S14H
LEBB-S14H
LD614
R659
47
R665
47
R664
47
R662
47
LEBB-S14H
LD607
LEBB-S14H
LD602
R654
47
LD611
LEBB-S14H
LD612
LEBB-S14H
R653
47
R651
47
LEBB-S14H
LD600
LEBB-S14H
LD603
LEBB-S14H
LD606
R607
0
LEBB-S14H
LD601
LEBB-S14H
LD608
LEBB-S14H
LD605
R670
47
R669
47
R668
47
R666
47
R667
47
LEBB-S14H
LD620
LEBB-S14H
LD619
LEBB-S14H
LD618
LEBB-S14H
LD616
LEBB-S14H
LD617
LD621
LEBB-S14H
R661
47
R655
47
R652
47
R663
47
R660
47
R657
47
LEBB-S14H
LD604
47
R674
KYBD_BACKLIGHT
+VPWR
Summary of Contents for U8500
Page 1: ...Date February 2006 Issue 1 0 Service Manual Model U8500 Service Manual U8500 ...
Page 20: ...3 TECHNICAL BRIEF 21 ...
Page 32: ...3 TECHNICAL BRIEF 33 Figure 3 5 6 1 GSM PA functional block diagram ...
Page 35: ...3 TECHNICAL BRIEF 36 Figure 3 5 10 1 Bluetooth system architecture ...
Page 50: ...3 TECHNICAL BRIEF 51 Figure 3 10 3 2 1 PM6650 Functional Block Diagram ...
Page 114: ...4 TROUBLE SHOOTING 115 Loud Speaker U502 U503 Amp ...
Page 118: ...4 TROUBLE SHOOTING 119 C200 C201 for MIC serial capacitor ...
Page 121: ...4 TROUBLE SHOOTING 122 Q404 Q403 Q402 VBATT GND ...
Page 143: ...6 BLOCK DIAGRAM 144 6 3 Interface Diagram U8500 Interface Diagram ...
Page 145: ... 146 ...
Page 154: ... 155 U8500 8 PCB LAYOUT ...
Page 155: ... 156 8 PCB LAYOUT U8500 ...
Page 156: ... 157 8 PCB LAYOUT ...
Page 157: ... 158 8 PCB LAYOUT ...
Page 158: ... 159 U8500 8 PCB LAYOUT ...
Page 159: ... 160 U8500 8 PCB LAYOUT ...
Page 166: ...9 CALIBRATION 167 Click START button U8500 U8500_ver1 1 U8500 U8500 Click U8500 ...
Page 167: ... 168 ...
Page 169: ... 170 ...
Page 194: ...Note ...
Page 195: ...Note ...