Sony Betacam SX DNW-A100 Maintenance Manual

3-16 DNW-A100/A50/A45DNW-A100P/A50P/A45PERROR-22 REEL POSITION SENSOR TROUBLE(REEL POS SENSOR)Description: The L and S cassette positions of the reel table were detected simultaneously.Detecting condition: When the L and S position sensors detect the L and S cassette positions, respec-tively at the same time.Sub error message: NonePossible causes: . S position sensor (PTC-71 board) trouble. L position sensor (PTC-71 board) trouble. Reel position input port (IC1 on MS-50 board) troubleProtecting operation: If possible, ejects the cassette, when an error occurs during cassette insertion.Prohibits the cassette insertion.ERROR-23 THREADING RING POSITION ERROR(THRED RING SENS)Description: The thread end and unthread end states were detected simultaneously.Detecting condition: When the thread end and unthread end sensors detect the thread end and un-thread end states, respectively at the same time.Sub error message: NonePossible causes: . Thread end sensor (TR-79 board) trouble. Unthread end sensor (TR-79 board) trouble. Thread end or unthread end input port (IC1 on MS-50 board) troubleProtecting operations: Ejects the cassette during cassette insertion or ejection.Enters the protection mode during tape threading/unthreading.Stops the tape transport and enters the rest state in cases except the above.3-2. Details of Error Messages