LG LHT754 Troubleshooting Manual page 3

Safety Rules
Safety & Handling Regulations
1. Approximately 10 minute pre-run time is required before any adjustments are performed.
2. Do not exceed Higher voltage than is required for the product.
3. Be cautious of electric shock from the PBC modules since the modules use high voltage, and it is
recommended that you should not touch the drive circuits for at least one minute because of residual
current stored.
4. Circuit drive has c-mos circuits which should be protected from static electricity.
5. Be careful of short circuits when measuring voltages.
6. Be cautious of screws and other metal objects to prevent a short in the circuitry.
Checking Point before Replacing PCB Modules
1. Check the appearance of Power Supply and PCB's
2. Check the model label. Verify model names and board model matches.
3. Check details of defective condition and history.
IE: Software Updates, Service Bulletins
Home Theatre Troubleshooting - 2007
Home Theatre Overview
Troubleshooting