3-9
DNW-A75/A75P
ERROR-08 DRUM TROUBLE
(DRUM TROUBLE)
Description: Malfunction of drum motor was detected.
Detecting condition: When the drum FG cycle is shifted more than about ±30 % continuously for
more than 10 seconds as compared with during normal rotation.
Sub error message: None
Possible causes: . Drum motor trouble
. DRUM MPU (IC314 on SS-83 board) trouble
. Drum motor drive circuit (DR-315 board) trouble
. Drum FG/PG waveform shaper circuit (DR-315 board) trouble
. Assembly defect during upper drum replacement
Protecting operation: Stops the tape transport and enters the rest state in the unthread end state.
ERROR-09 TH/UNTH MOTOR TIME OUT
(TH/UNTH MOTOR)
Description: Malfunction of threading or unthreading operation was detected.
Detecting conditions: 1) When no operation is completed within about six seconds after operation
start.
2) When no threading FG is output within about 0.4 second during threading
motor drive.
3) When states other than unthread end are continued for more than six seconds
in case that the unit should be in the unthread end state.
Sub error message: None
Possible causes: . Unthread end sensor (TR-79 board) trouble
. Thread end sensor (TR-79 board) trouble
. Thread end/unthread end input port (IC1 on MS-58 board) trouble
. Threading motor trouble
. Threading FG sensor (PTC-54 board) trouble
. Threading FG waveform shaper circuit (MS-58 board) trouble
. Threading motor drive circuit (DR-315 board) trouble
. Threading mechanism trouble
Protecting 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
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