LG HB620 - Page 107

- 108 -
4. TROUBLE SHOOTING
LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Check T P1
VCC of VCXO
VCC
2.8V
Check T P2
TRK_LO_ADJ
3
VVolta
g
e0V
Check T P3, TP4
With Oscilloscope
19.2MHz Si
g
nal
VCXO is OK
Check other part
Check PMIC
Check MSM
Check solder ing
and components
Yes
Yes
Ye
s
No
No
No
[Fig. 4.11] TCXO output waveform(19.2MHz)
Z3X-BOX.COM