4. TROUBLE SHOOTING
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Only for training and service purposes
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C216
330p
FB200
U210
3
2
4
1
5
VCC
GND
R212
100
C218
0.1u
330p
C229
VREG_MSMA_2.6V
VREG_TCXO_2.85V
C210
1n
0.1u
C211
330p
C215
R219
33
10n
C214
R220
100K
X210
EAW61543601
X1G003581002700
19.2MHZ
3
2
6
5
4
1
VC
VCC
TP1
TP2
GND
OUT
TCXO_EN
TCXO_PM_19.2MHZ
TCXO_RTR_19.2MHZ
RTR_TRK_LO_ADJ
USBH_SYSCLK
Clesed to TCXO
25x20x0.8T
FFA Rev.C(220Ohm@100MHz)
TP1
TP2
G
snlGpG|Gv G
G
4.3 Checking TCXO Block
The output frequency (19.2MHz) of TCXO (X210) is used as the reference one of RTR6285 and PM7540 internal
VCO.
Schematic of the Crystal Part(19.2MHz)
{wX
{wY
G
{wZ
TP1
G
TP2
G
TP3
G
TP3