The LG AS811 is a professional service manual detailing technical specifications, disassembly procedures, troubleshooting guides, and maintenance instructions for the AS811 model. This manual provides comprehensive information for qualified service technicians including circuit diagrams, parts lists, safety precautions, and repair procedures. Below are key sections for safety, technical specifications, disassembly, troubleshooting, and maintenance.
Important safety warnings and precautions for service technicians.
| Warning Type | Description |
|---|---|
| Electrical Safety | Always disconnect power before servicing |
| High Voltage | Caution around high voltage components |
| ESD Protection | Use anti-static wrist strap when handling PCBs |
| Component Handling | Handle delicate components with care |
| Test Equipment | Use properly calibrated test equipment |
| Replacement Parts | Use only authorized LG replacement parts |
| Work Environment | Maintain clean, well-lit work area |
| Documentation | Follow procedures exactly as specified |
| Quality Control | Test all repairs before returning to customer |
| Certification | Only certified technicians should perform repairs |
Complete technical specifications and operating parameters.
Step-by-step disassembly instructions for service access.
WARNING! Always discharge capacitors before handling power supply components.
Detailed circuit schematics and block diagrams.
Complete list of replacement parts and components.
| Part Number | Description | Quantity |
|---|---|---|
| AS811-MB-001 | Mainboard Assembly | 1 |
| AS811-PS-002 | Power Supply Unit | 1 |
| AS811-FAN-003 | Cooling Fan Assembly | 1 |
| AS811-BTN-004 | Button Panel Assembly | 1 |
| AS811-LED-005 | Status LED Board | 1 |
| AS811-CON-006 | Connector Set | 1 |
| AS811-SCR-007 | Screw Kit | 1 |
| AS811-CBL-008 | Cable Set | 1 |
| AS811-HSG-009 | Main Housing | 1 |
| AS811-COV-010 | Rear Cover | 1 |
Systematic troubleshooting procedures for common issues.
| Symptom | Possible Cause | Corrective Action |
|---|---|---|
| No Power | Power supply failure | Check power supply output voltages; replace if necessary |
| No Display | Mainboard or video circuit | Test video output signals; check mainboard functionality |
| No Audio | Audio circuit failure | Verify audio IC operation; check speaker connections |
| Overheating | Cooling system failure | Clean fan and heatsinks; replace fan if noisy or stuck |
| Network Issues | Network chip or antenna | Test network connectivity; check antenna connections |
| Button Failure | Button panel or flex cable | Test button continuity; replace button panel if needed |
| Boot Failure | Memory or processor issue | Check memory modules; test processor functionality |
| USB Not Working | USB controller or port | Test USB ports; check controller chip operation |
Routine maintenance and cleaning procedures.
CAUTION! Do not use liquids or chemical cleaners on any components.
Calibration procedures for optimal performance.
Essential tools for proper servicing.
| Tool | Specification | Purpose |
|---|---|---|
| Multimeter | Digital, auto-ranging | Voltage and continuity testing |
| Screwdriver Set | Phillips #0, #1, #2 | Disassembly and reassembly |
| Anti-static Wrist Strap | 1MΩ resistance | ESD protection |
| Soldering Iron | Temperature controlled | Component replacement |
| Oscilloscope | 100MHz bandwidth | Signal analysis |
| Heat Gun | Adjustable temperature | Heat shrink and SMD work |
| Tweezers | Anti-static | Handling small components |
| Compressed Air | ESD safe | Cleaning internal components |
Warranty terms and service policies.
LG service support and contact details.
Note: This manual is intended for qualified service technicians only.