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LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 98 -
4.14 Receiver Path
MSM6280 EAR1ON/EAR1OP
→
CN500
→
CN102
→
Receiver
Start
The sine wave appears at
PIN1,PIN2,CN500
Change the Main board
YES
Connect the phone to network
Equipment and setup call
Setup 1KHz tone out
NO
The sine wave appears at
PIN1,PIN2, CN500?
Check LCD FPCB.
Check main/upper connector.
YES
NO
Can you hear the tone?
Change receiver
YES
NO
END
Summary of Contents for CU405
Page 1: ...Date May 2007 Issue 1 0 Service Manual Model CU405 Service Manual CU405 Internal Use Only ...
Page 175: ...Note ...
Page 176: ...Note ...