LG MG120a Service Manual page 42

4. TROUBLE SHOOTING
(1) Checking Regulator Circuit
TEST POINT
U101. 3
(EN)
CIRCUIT
CHECKING FLOW
Voltage at
Pin5 of U101
Is 2.85V?
YES
Regulator Circuit is OK
See next Page to check
VCTCXO
U101
Level at
NO
Pin3 of U101
Is high?
YES
Replace U101
-42-
U101. 5
(OUT)
Figure 6
NO
Change main board