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(1) Checking Regulator Circuit
TEST POINT
CIRCUIT
CLKON
Checking Flow
Voltage at
Pin5 of U702
Is 2.8V?
YES
Regulator Circuit is OK
See next Page to check
VCTCXO
VBAT
U702 MIC5255-85BM5
1
IN
OUT
2
GNO
3
EN
BYP
C533
10u
Level at
NO
Pin3 of U702
Is high?
YES
Replace U702
- 55 -
4 . TROUBLE SHOOTING
RF2V85
5
4
C734
C534
0.01u
10u
(1608)
NO
Change main board
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