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(1) Checking Crystal Circuit
TEST POINT
1
Figure 4.2.1
CIRCUIT
BT_CLK26M
C103
CHG_EN
TSX-3225 26MHZ_7_4PF
26MHz
2
3
X102
TP1
Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes
TP1(X102)
1 pin : 26MHz
M32
FREF
H6
4.7u
AU_VCM
Y6
PWM
K34
XTAL1
1
L33
XTAL2_GND
4
V4
AVDD_RTC
T4
TP1
4. TROUBLE SHOOTING
CHECKING FLOW
26 MHz O.K?
Yes
Crystal is OK.
See next page to check PLL Circuit
WAVEFORM
60/140
- 57 -
4. TROUBLE SHOOTING
No
Replace TP1
LGE Internal Use Only
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