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Ohuobahroyal

B laser out of range

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2 hours ago, Minilab service said:

06220-00001 means B laser temperature exceeds 50.0°C ( upper limit temperature) . The B laser thermosensor is built into the B laser. Go into input check and look temperature there. Can be broken temperature sensor, laser control pcb, or connection between them.

Which of the volts card controls the b sensor 

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2 minutes ago, Ohuobahroyal said:

Which of the volts card controls the b sensor 

The laser control PCB.

As Minilab service has said check what temperature is being displayed in input check.

Also check the cooling fans underneath the laser unit are operating and not clogged up with dust.

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Turn off minilab breaker and wait until laser cool down. Then turn on minilab and immediately go into this menu. Look laser temperature changes.

Now B laser thermosensor is not within the range from 46.7°C to 47.3°C. It shows almost maximum, which is 50.0°C . You have 49.2°C. Check Laser unit cooling fan 1 or 2. Maybe one of them, or both doesn't rotate. 

Also check B laser heater voltages on J1532  ( heater control circuit ) . Might be this circuit overheating B laser.

Can check  voltages on thermosensor circuit ( J1504 ) . Just in case can turn off minilab and check thermosensor resistance. Disconnect J1504 and look resistance between Pin 8 (+) and 9 (−) . Sensor is NTC type. Resistance depends on temperature 15°C - 7.4 kΩ to 8.5 kΩ, 20°C - 6.0 kΩ to 7.0 kΩ, 25°C - 5.0 kΩ to 5.8 kΩ 30°C - 4.1 kΩ to 4.8 and etc. Might be that minilab software see higher temperature, than it is really. 

Can be faulty laser control PCB ( heater control circuit, sensor circuit and etc ) , B laser thermosensor, or fans.

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12 hours ago, Minilab service said:

Turn off minilab breaker and wait until laser cool down. Then turn on minilab and immediately go into this menu. Look laser temperature changes.

Now B laser thermosensor is not within the range from 46.7°C to 47.3°C. It shows almost maximum, which is 50.0°C . You have 49.2°C. Check Laser unit cooling fan 1 or 2. Maybe one of them, or both doesn't rotate. 

Also check B laser heater voltages on J1532  ( heater control circuit ) . Might be this circuit overheating B laser.

Can check  voltages on thermosensor circuit ( J1504 ) . Just in case can turn off minilab and check thermosensor resistance. Disconnect J1504 and look resistance between Pin 8 (+) and 9 (−) . Sensor is NTC type. Resistance depends on temperature 15°C - 7.4 kΩ to 8.5 kΩ, 20°C - 6.0 kΩ to 7.0 kΩ, 25°C - 5.0 kΩ to 5.8 kΩ 30°C - 4.1 kΩ to 4.8 and etc. Might be that minilab software see higher temperature, than it is really. 

Can be faulty laser control PCB ( heater control circuit, sensor circuit and etc ) , B laser thermosensor, or fans.

I disconnected and connected the J1504 back and the temperature completed hoping it will finally solve the problem 

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