Cpu (System Control) Troubleshooting - LG LST-3100A Service Manual

3. CPU (System Control) Troubleshooting

Start
YES
Is Power supplied normally?
YES
Is each clock OK?
YES
Is each reset OK at the time of
power- on reset?
YES
Is each chip selection OK?
YES
Is each I2C channel OK?
YES
Are messages output through
RS- 232C port on PC terminal?
YES
End
NO
Check Power : Refer to (A)
NO
Check each clock : Refer to (B)
NO
Check reset circuit : Refer to (C)
NO
Check each chip selection : Refer to (D)
NO
Check each I2C channel : Refer to (E)
NO
Check RS- 232C circuit : Refer to (G)
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