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Problem scaner sp2000


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W-1239 means light source section safety thermostat(ST201) burned out. Can be :
Filter in light source section clogged.
Light source section cooling air outlet clogged.
Light source section suction/exhaust fan(F302/F303) malfunction
Safety thermostat(ST201) failure
Tripped CP103 or CP104 on PWR20 circuit board
Faulty CTB20 circuit board

Check all that.

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