Installation Guide
Tools Needed:
- Screwdrivers (flat and Phillips)
- Multimeter
- Nut drivers
- Wire strippers
- Safety gloves
Step-by-Step Installation
- Safety First: Disconnect power supply and discharge high voltage capacitor before starting any repair work.
- Remove Outer Casing: Carefully remove screws and outer casing to access internal components.
- Inspect Components: Check magnetron, capacitor, diode, and transformer for visible damage.
- Test Electrical Components: Use multimeter to test continuity and resistance of key components.
- Replace Faulty Parts: Install genuine LG replacement parts following manufacturer specifications.
- Reassemble Unit: Carefully reassemble all components and secure casing properly.
- Test Operation: Perform safety check and test microwave operation before returning to customer.
Specifications
| Model Series | MH6345BAT |
| Type | Countertop Microwave Oven |
| Color | Stainless Steel / Black |
| Capacity | 1.7 cu. ft. |
| Power Output | 1200 Watts |
| Control Type | Digital Touch Controls |
| Cooking Modes | 10 Power Levels |
| Turntable Size | 14 inches |
| Power Requirements | 120V, 60Hz, 15A |
| Dimensions (HxWxD) | 17.1 x 29.9 x 19.7 inches |
| Weight | 55 lbs |
| Warranty | 1 Year Parts & Labor |
Warranty Information
- Full Warranty: 1 year parts and labor
- Magnetron Warranty: 5 years on microwave generator
- Additional Coverage: Optional extended warranty available
For warranty service, contact LG Customer Service at 1-800-243-0000 or visit LG.com
Key Features
Inverter Technology
LG's Inverter Technology delivers a continuous stream of cooking power for even heating and precise temperature control, unlike conventional microwaves that pulse on and off.
Smart Diagnosis
Advanced Smart Diagnosis system helps identify issues quickly by analyzing error codes and performance data, reducing repair time and improving accuracy.
EasyClean Interior
Special ceramic enamel interior resists stains and makes cleaning simple, while the antimicrobial treatment helps prevent odor-causing bacteria and mold.
Sensor Cooking
Intelligent sensor technology automatically adjusts cooking time and power level based on steam detection for perfect results every time.
SmartThinQ Technology
Wi-Fi enabled for remote diagnostics and control via smartphone app, allowing technicians to monitor performance and receive error alerts.
Eco Mode
Energy-saving features reduce standby power consumption by up to 50% compared to conventional microwave ovens.
Technical Components Explained
Magnetron
Generates microwave energy for cooking - check for continuity and proper high voltage output
High Voltage Capacitor
Stores electrical energy - always discharge before testing or replacement
High Voltage Diode
Rectifies AC to DC voltage - test for proper forward and reverse bias
Thermal Cut-out
Safety device that shuts off power if unit overheats - check for continuity
Turntable Motor
Rotates food for even cooking - test for proper voltage and rotation
Control Board
Main computer that operates all functions - check for burnt components and proper voltage
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Microwave won't start | Door switch failure, control board issue, thermal cut-out | Test door switches, check control board voltage, reset thermal cut-out |
| No heat but runs | Magnetron failure, high voltage diode, capacitor issue | Test magnetron continuity, check diode and capacitor, measure high voltage |
| Sparkling inside | Waveguide cover damaged, metal object inside, magnetron arcing | Replace waveguide cover, remove metal objects, inspect magnetron |
| Turntable not rotating | Turntable motor failure, roller guide issue, obstruction | Test turntable motor, check roller guide, remove obstructions |
| Display not working | Control board failure, power supply issue, ribbon cable | Check control board voltage, test power supply, inspect ribbon cable |
| Unusual noises | Fan motor bearing, transformer vibration, loose components | Lubricate or replace fan motor, secure transformer, tighten components |
Error Codes
- E1: Door switch error - Check door switches and alignment
- E2: Thermal cut-out error - Check ventilation and reset thermal cut-out
- E3: Temperature sensor error - Replace temperature sensor
- E4: Communication error - Check control board connections
- E5: Magnetron error - Test magnetron and high voltage circuit
- E6: Turntable motor error - Check turntable motor and connections
Manual Downloads
Current Model Manuals
MH6345BAT
1.7 cu.ft. Smart Inverter
MH6345BAS
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MH6535CAT
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MH6335BAT
1.6 cu.ft. Sensor Cook
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