Audio Trouble - LG HB620 Service Manual

4. TROUBLE SHOOTING

4.7 Audio trouble

4.7.1 Receiver path
Voice Receiver path as below:
MSM6280 Ear1ON/Ear1OP
LCD FPCB connector)
PAD) → Receiver
Connect the phone to network Connect the phone to network
LGE Internal Use Only
→ U304(Speaker/Receiver Selection Switch)
→ CN101(LCD FPCB to Main PCB Connector)
Start Start
Equipment and setup call Equipment and setup call
Setup 1KHz tone out Setup 1KHz tone out
? ?
Hear the tone to the receiver Hear the tone to the receiver
NO NO
Change the Receiver Change the Receiver
Work Well Work Well
NO NO
CheckCN502(Main),CN101 CheckCN502(Main),CN101
(LCD FPCB) Connector or (LCD FPCB) Connector or
Change the LCD FPCB Change the LCD FPCB
Can you hear the tone? Can you hear the tone?
YES YES
END END
- 84 -
→
→ OUT1, OUT2(Receiver
YES YES
END END
NO NO
Change the main Board Change the main Board
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
CN502(Main PCB to