LG TracFone LG840G Service Manual page 50

4.3.1 Checking XO Circuit
XO_ADC_REF
XO_ADC_IN
GND_XO_ADC
VREF_THERM
HKAIN0
XTAL_19M_IN
XTAL_19M_OUT
LGE Internal Use Only
Check TP1
(X302)
Yes
End
W23
W22
Y23
AC13
T22
1ZCB19200AB0E
V23
U23
V9
TP1
No
Check U201
TP1
VREF_THERM_OUT
VBAT_TEMP
X302
3 4
2 1
19.2MHz
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4. TROUBLE SHOOTING
Only for training and service purposes