PART-2
MALFUNCTION EVALUATION METHODS
X-RAY PROTECT
If X-Ray port becomes continuously 2.5V or more for 120ms, the unit shall immediately turn off the Power/Monitor and will switch over to the mechanical malfunction mode with Power Off. To turn from this mode shall become possible only by Power key, as the case of the Mechanical Malfunction.
MECHANICAL MALFUNCTION DETERMINATION
Reel Malfunction Detection.
Countermeasure for Reel and Capstan motor rotation malfunction; except cassette loading mechanism. After the malfunction detection with Reel of Capstan sensor the unit shall switch over to 'stop', and be reel Mechanical Malfunction.
If the T-Reel pulse is not impressed after a lapse of 7 seconds at SP, 14 seconds at LP or more in reel rotation mode like Play/record, FS, RS Mode, and the T-Reel or S-Reel pulse is not impressed after a lapse of 4 seconds or more in Reel Rotation mode of FF/REW, it shall be assumed to 'Stop' and the unit be Reel Mechanical Malfunction.
If the C-FG pulse is not impressed for a lapse of 1 second or more during the Capstan Motor rotation , it shall be Motor Rotation Malfunction.
Drum Malfunction Detection.
If the variation of D-FG input level is not detected for a lapse of 1 second, or more, when D-Cont is "H"it shall be assumed to be Rotation Malfunction and be Drum Malfunction. When detect Drum Malfunction, Power shall be turned Off after the unit switches over to 'Stop' B mode.
TAPE LOADING MALFUNCTION
- If LD-SW does not go to the established position after a lapse of 7 seconds or more from Tape Loading or Tape Unloading start, the loading function shall immediately be stopped and power be turned Off, and inform the timer about the Loading Mechanical Malfunction.
- LD Switch position Malfunction at each mode, even if the LD-SW position changes from the established one in its mode, it keeps the function according to its mode.
COUNTERMEASURE FOR CASSETTE LOADING MALFUNCTION.
- If LD-SW does not go to SB position after a lapse of 5 seconds, or more from the cassette insertion start, the unit start the cassette out operation. After switch over to cassette out operation and then a lapse of 5 seconds or more from the Cassette Out operation start, if LD-SW does not go to the EJ position, or if the start sensor and end sensor does not turn On at the EJ position, the unit starts again to insert cassette.
CASSETTE OUT OPERATION MALFUNCTION
- After a lapse of 5 seconds or more from Cassette Out operation start, if LD Sw does not go to the EJ position or if the Start Sensor and end sensor does not turn On at EJ position, the unit starts to insert cassette. When the unit switches over to cassette insertion at cassette in or cassette out Malfunction, if the LD-SW does not go to the SB position after a lapse of 5 seconds or more from Cassette insertion start, the function shall immediately stopped, and power be turned Off, and the unit be Cassette Loading Malfunction. When Power is turned On, if the CL position or GC position cannot be detected after 5 seconds LD-REV operation and LD-FWD operation, the function shall immediately stopped and power be turned Off, and the unit be Cassette Loading Malfunction. When the power is turned On without cassette EJ position, and LD-SW is monitored all the time if the CL or GC position is detected continuously for 1 second or more, the power shall be turned off, and the unit be Cassette Loading Malfunction.
COUNTERMEASURE FOR MECHANICAL MALFUNCTION
- If the unit detects Mechanical Malfunction, turn the Power Off. If the unit is Mechanical Malfunction, key input, except Power key shall be disabled, and cassette insertion disabled. When the Power Key is entered, the Power is turned On, and the unit switches over the Eject Mode.
