LG FM300 Service Manual page 63

(1) Check Core voltage(TP1)
(2) Check MEM voltage(TP2) (2) Check MEM voltage(TP2)
(3) Check IO voltage(TP3)
(4) Check TCXO voltage(TP4)
(5) Check SXTAL voltage(TP5)
(6) Check SYS_PLL voltage(TP6)
(7) Check EXTAL Frequency (TP7)
(8) Check REF_CLK Frequency(TP8)
LGE Internal Use Only
CHECKING FLOW
TP1= 1.2V
Yes
TP2= 1.8V
Yes
TP3= 1.8V
Yes
TP4= 2.8V
Yes
TP5= 2.6V
Yes
TP6= 1.3V
Yes
TP7= 12Mhz
Yes
TP8= 19.2Mhz
Yes
FM300 working well ! FM300 ki ll !
No
Check the R510 Soldering
If soldering is fine, change U502
No
Check the R514 Soldering
If soldering is fine, change U502
No
Check the R509 Soldering
If soldering is fine, change U501
No
Check the R516 Soldering
If soldering is fine, change U501
No
Check the U601 Soldering
If soldering is fine, change U503
No
Check the U605 Soldering
If soldering is fine, change U504
No
Check the X300 Soldering
If soldering is fine, change X300 If soldering is fine change X300
No
Check the U200 Soldering
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4. TROUBLE SHOOTING
Only for training and service purposes