LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 95 -
4.15 Receiver Path
MSM6260 RCV+/RCV-
→
R836/R837
→
Analog Switch(U301)
→
CON601
L1,L2(LCD_FPCB)
→
SPKP,SPKN
Start
Connect the phone to network
equipment and setup call
Setup 1KHz tone out
Sine wave appears at
R836/R837?
Check R836/R837 or
Change the main board
NO
Change the main board
NO
YES
Sine wave appears at
L1,L2 on LCD_FPCB?
Change the LCD
FPCB
NO
Can you hear the tone?
Change the speaker
NO
YES
END
YES
YES
Speaker soldering is
Good?
Re-solder Speaker
NO
SPK_SW_ON(R829) is
0 V?