Janome 6600 Repair Manual

The Janome 6600 is a high-performance computerized sewing machine featuring advanced stitch capabilities, automatic needle threader, built-in needle plate, speed control slider, knee lifter, and extensive stitch patterns. This repair manual covers disassembly, troubleshooting, maintenance procedures, and technical specifications for qualified technicians. Below are key sections for safety precautions, technical specifications, disassembly procedures, troubleshooting, maintenance, and parts replacement.

1. Technical Specifications 2. Safety Precautions 3. Disassembly Procedures 4. Troubleshooting Guide 5. Maintenance Schedule 6. Parts Replacement 7. Electrical System 8. Mechanical Components 9. Calibration Procedures 10. Warranty Information 11. Service Contacts

Technical Specifications

Key components: Computerized control panel, DC servo motor, automatic needle threader, built-in needle plate, knee lifter, speed control slider.

FeatureDescription
Motor TypeDC Servo Motor with speed control
Stitch PatternsOver 200 built-in stitches
Maximum Speed1000 stitches per minute
Needle PositionsAutomatic needle up/down
Threading SystemAutomatic needle threader
Presser Feet7-piece snap-on set included
DisplayLCD screen with stitch selection
Power Requirements120V AC, 60Hz
Dimensions18.5" x 8.3" x 12.2"
Weight22.5 lbs

Safety Precautions

Always disconnect power before servicing. Use proper tools and follow ESD precautions.

  1. Disconnect power: Unplug machine before any disassembly or repair work.
  2. Use insulated tools: Prevent electrical shock during service.
  3. Wear safety glasses: Protect eyes from springs and small components.
  4. Document disassembly: Take photos during teardown for reassembly reference.

WARNING! High voltage present in power supply section. Only qualified technicians should perform repairs.

Disassembly Procedures

Follow step-by-step disassembly for access to internal components.

  1. Remove outer covers: Unscrew top, front, and side covers carefully.
  2. Access main board: Remove control panel assembly to reach computer board.
  3. Motor removal: Disconnect wiring harness and remove mounting screws.
  4. Feed dog mechanism: Remove throat plate and access feed dog assembly.
  5. Hook race assembly: Remove bobbin case and hook race for cleaning.

CAUTION! Label all connectors and take photos during disassembly for proper reassembly.

Troubleshooting Guide

Maintenance Schedule

Regular maintenance prevents common issues and extends machine life.

Daily: Clean lint from bobbin area, needle plate, and feed dogs.

Weekly: Oil hook race and moving parts with sewing machine oil.

Monthly: Check belt tension, clean motor ventilation, inspect brushes.

Annually: Complete service including timing adjustment, full lubrication.

Parts Replacement

Use only genuine Janome replacement parts for optimal performance.

  1. Needles: Replace with Janome HAx1 needles every 8 hours of sewing.
  2. Motor brushes: Replace when worn to 1/4 inch length.
  3. Drive belt: Replace if cracked, glazed, or slipping.
  4. LED display: Replace entire control panel assembly if damaged.
  5. Foot control: Replace if speed control becomes erratic.

Tip: Order parts using Janome part numbers for correct fit and function.

Electrical System

Computerized control system with main board, motor control, and sensor inputs.

  1. Main Power Board: Regulates AC input to DC for motor and logic circuits.
  2. Motor Control: PWM circuit controls DC servo motor speed.
  3. Sensors: Optical position sensors for needle position and stitch timing.
  4. Display Circuit: LCD driver and touch interface circuitry.
  5. Foot Control: Variable resistance input for speed control.

WARNING! High voltage present on power supply board. Discharge capacitors before servicing.

Mechanical Components

Precision mechanical systems require careful adjustment and lubrication.

Timing System: Main shaft, cam stack, and stitch formation mechanism.

Feed Mechanism: Feed dogs, presser foot, and advance system.

Hook Assembly: Rotating hook, bobbin case, and thread tension.

Needle Bar: Needle bar, thread take-up lever, and guidance system.

Lubrication: Use only Janome sewing machine oil on specified points.

Calibration Procedures

Critical adjustments for proper stitch formation and machine operation.

  1. Needle to hook timing: Set at specific degree mark on handwheel.
  2. Thread tension: Calibrate upper and bobbin tension for balanced stitches.
  3. Feed dog height: Adjust for proper fabric feed without marking.
  4. Presser foot pressure: Set for different fabric types and thicknesses.
  5. Motor speed calibration: Adjust PWM settings for consistent speed control.

CAUTION! Use proper gauges and follow calibration procedures exactly.

Warranty Information

Janome 6600 carries 25-year limited warranty on mechanical parts.

Warranty covers defects in materials and workmanship. Does not cover consumables (needles, belts), damage from misuse, improper maintenance, or unauthorized repairs. Keep original receipt for warranty service.

Service Contacts

Service TypeContact InformationHours
Technical Support1-800-631-0183Mon-Fri 9am-5pm EST
Parts Orders[email protected]24/7 Online
Authorized Service Centerswww.janome.com/dealersVaries by location
Warranty Claims[email protected]Mon-Fri 8am-4pm EST
Emergency Service1-800-631-0183 (select option 3)24/7 for critical issues

Online Resources: Service bulletins, parts diagrams, and firmware updates at www.janome.com/support

Training: Technical training available for certified repair technicians.

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