Chapter 4. Trouble Shooting - LG -TM250 Service Manual

LG-TM250

CHAPTER 4. Trouble Shooting

1.When power isn't "Turn On
Voltage at 1 Pin of D402
Voltage at 3 Pin of Q401
Voltage at 6 pin of U403
Change the main board
LG Electronics Inc.
".
START
Yes
Batt. Volt < 3.6V
n
Yes
n
Yes
n
Yes
Voltage at 2,3,4 pin of U404
Less than 1.8V
n
Yes
Voltage at 2,3,4 pin of U407
Less than 2.5V
n
Yes
Less than 2.7V
n
Recharge Battery
Change the D402
Change the Q401
Change the U404
Change the U407
Change the U403
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