LG -E400f Service Manual page 40

LGE Internal Use Only
Check TP1
VCC of TCXO
VCC ≥ .8V
Yes
Check TP
.4V ≥ Voltage ≥ 0.4V
Yes
Check TP3
19. MHz Signal
Yes
TCXO is OK
No
Check the PM809
No
Check the MSM75A
No
Check soldering and
components
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4. TROUBLE SHOOTING
Only for training and service purposes