Back to Dossiers
Automotive EquipmentReplacement PartsUnverified

LAUNCH CNC-603A Control Board

Replacement PCB for fuel injector cleaner/tester

MAYBE

AliExpress-sourced replacement control board for LAUNCH CNC-603A ultrasonic fuel injector cleaning and testing machine. Potentially useful for repairs, but authenticity and compatibility are major unknowns.

December 30, 2025
v1.0.0

Verdict Rationale

Could save significant money on CNC-603A repairs if the board actually works and is compatible with your specific unit. However, no verification of authenticity, compatibility, or quality. Only consider if official LAUNCH parts are unavailable or prohibitively expensive.

Specifications

Target DeviceLAUNCH CNC-603A(Ultrasonic injector cleaner)
Board TypeMain Control PCB(Power supply and control)
Voltage110V or 220V(Match your device version)
Compatible Functions5 test modes(Uniformity, Leakage, Flow, Auto, Ultrasonic)
Cylinders SupportedUp to 6
Claimed CompatibilityCNC-603A / CNC603A(Verify exact model match)

Overview

The LAUNCH CNC-603A is a professional-grade ultrasonic fuel injector cleaning and testing machine used by automotive repair shops. The complete unit retails for $1,295-2,189 USD from authorized dealers.

This dossier covers replacement control boards sold on AliExpress for significantly less than official LAUNCH parts pricing. These boards claim compatibility with the CNC-603A but come with substantial unknowns.

The CNC-603A Machine

For context, the LAUNCH CNC-603A is an advanced fuel injector service tool that combines:

  • Ultrasonic cleaning - removes deposits from injector internals
  • Flow testing - measures injector output volume
  • Spray pattern testing - visual inspection of spray uniformity
  • Leak testing - detects faulty injector seals
  • Automated test cycles - standardized testing procedures

Machine Specifications

SpecificationValue
Input Power230W
Cleaning Power100W
RPM Range10-9990 rpm
Pulse Width0.5-25 ms
Fuel Capacity2500 mL
CylindersUp to 6
Voltage110V or 220V

The machine supports gasoline port injectors. GDI (Gasoline Direct Injection) injectors require different equipment due to higher operating pressures.

The Replacement Board

Unverified Product

This product has NOT been personally tested. All analysis is based on listing information, product photos, and knowledge of similar replacement parts. Actual quality and compatibility are unknown.

What You're Getting

Based on the AliExpress listing, this appears to be:

  • Main control PCB for CNC-603A
  • Handles power supply regulation
  • Controls pump, ultrasonic generator, and test functions
  • Interfaces with display panel and user controls

What's Unknown

Critical unknowns that affect purchase decision:

  1. Authenticity: Is this a genuine LAUNCH OEM part, a factory-quality clone, or a low-quality knockoff?

  2. Revision Compatibility: The CNC-603A has been manufactured for years with multiple hardware revisions. Boards may not be interchangeable between revisions.

  3. Failure Mode: Why are these boards available separately? Are they pulls from failed/returned units, factory rejects, or purpose-manufactured replacements?

  4. Quality Control: What testing (if any) has been performed? Unknown failure rate.

When This Makes Sense

Potentially Viable Scenario

Your CNC-603A's control board has failed. LAUNCH or authorized service:

  • Quotes $500+ for repair
  • Has multi-week turnaround
  • Machine is critical for your shop income

In this case, a $50-150 gamble on an AliExpress board might be worth attempting, with full acceptance that it may not work.

Not Recommended Scenarios

  • Preventive replacement - Don't replace a working board
  • First repair attempt - Try troubleshooting original board first
  • Critical reliability needs - If machine downtime is unacceptable
  • No electronics experience - Board replacement requires technical skill

Installation Considerations

Safety First

The CNC-603A works with flammable fuel under pressure. Improper repairs can cause fires, fuel leaks, or injury. If you're not comfortable with automotive electrical repair, do not attempt this.

Before Ordering

  1. Document your original board thoroughly

    • Photograph from all angles
    • Note all connector positions and types
    • Record any revision/version numbers printed on PCB
    • Measure board dimensions

  2. Verify voltage compatibility

    • 110V and 220V versions exist
    • Wrong voltage = immediate destruction
    • Check your machine's rating label

  3. Contact seller with specifics

    • Send photos of your current board
    • Ask about compatibility with your revision
    • Request additional board photos

Testing Protocol

If you receive and install the board:

  1. Visual inspection - Check for damage, cold solder joints, missing components
  2. Continuity testing - Verify no shorts before powering
  3. Bench test first - Power up without fuel, verify display and controls function
  4. Dry run - Test pump and ultrasonic with water only
  5. Monitored fuel test - First test with fuel, remain present, fire extinguisher ready

Alternatives

Official LAUNCH Support

Contact LAUNCH Tech USA (1-855-275-5141) or your regional distributor for:

  • Official replacement parts pricing
  • Authorized repair service
  • Warranty status check

Official parts cost more but include compatibility guarantee and support.

Third-Party Repair Services

Some electronics repair shops specialize in automotive equipment. They may be able to:

  • Diagnose and repair your original board
  • Source compatible components
  • Provide warranty on their work

Replacement Machine

If repair costs approach 50%+ of new machine price, consider:

  • LAUNCH CNC-603A (new): $1,295-2,189 USD
  • LAUNCH CNC-602A (older model): May be available used
  • Other brands: Autool, CNBJ, generic options exist at lower price points

Verdict

This is a calculated gamble, not a recommended purchase. The potential savings are significant—possibly $300-500+ compared to official repair. But you're accepting:

  • Unknown compatibility
  • Unknown quality
  • Zero warranty
  • Potential total loss of money spent
  • Safety risks if board malfunctions

Only consider if:

  • Official repair is unavailable or cost-prohibitive
  • You have electronics troubleshooting experience
  • You accept total loss as possible outcome
  • Your machine is already non-functional (nothing to lose)

Do not purchase if:

  • Your machine currently works
  • You need guaranteed reliability
  • You're not comfortable with electrical repair
  • You can't verify voltage compatibility

Use Cases

CNC-603A Repair

fair

Replacing a failed control board in existing LAUNCH CNC-603A unit

Cost-Effective Fix

fair

Avoiding expensive official LAUNCH repair service

DIY Machine Build

poor

Attempting to build injector cleaner from parts

Spare Parts Stock

poor

Keeping backup board for future repairs

Risks & Considerations

qualityHigh

No way to verify if this is genuine LAUNCH OEM part or a third-party clone. LAUNCH does not officially sell components through AliExpress.

Mitigation: Contact LAUNCH distributor first to compare pricing and availability of official parts

compatibilityHigh

CNC-603A has had multiple revisions. Board may not be compatible with your specific unit's hardware revision, display, sensors, or other components.

Mitigation: Photograph your original board extensively before ordering. Compare connector layouts, component placement, and revision markings

qualityMedium

Unknown manufacturing quality. May have inferior components, poor soldering, or missing protection circuits compared to original

Mitigation: Inspect board carefully upon arrival. Check for cold solder joints, missing components, and proper trace quality

safetyMedium

Injector cleaning machines handle flammable fuel and pressurized systems. Faulty control board could cause fuel leaks, fires, or injury

Mitigation: Test thoroughly before use with fuel. Have fire extinguisher nearby. Never leave unattended during initial testing

financialMedium

No warranty, no documentation, no technical support. If board doesn't work or causes damage, you have no recourse

Mitigation: Document everything. Use payment method with buyer protection. Accept total loss as possible outcome

safetyHigh

Ordering wrong voltage version (110V vs 220V) will destroy the board or connected components immediately

Mitigation: Triple-check your existing machine's voltage rating before ordering