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OSHIBA V 226B
Electrical Adjustments Cont�d
2-2. Audio Circuit The data displayed are as follows: Abnormality generation number
2
Wiring Diagram
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Abnormal system control modes
Main PC Board 2-2-1. Bias Level Adjustment Test Point: BS001, BS002 Test equipment: Millivoltmeter Adjusting point: PS034 1. Set the VTR to record mode. 2. Connect BS001 to the millivoitmeter and B5002 to GND. 3. Adjust PS034 to obtain 3.6 ± 0.1 mV(rms). 2-3. Self Diagnosis Function 2-3-1. Outline When a tape running stops or the VTR enters the power OFF mode, etc. due to some abnormality, the abnormality is stored in the EEPROM and displayed on the display tube. 2-3-2. Storing abnormal modes � The abnormality is classed into 5 groups, and the abnormality number, system control mode, and the mechanism position at which the abnormality occurred are stored in the EEPROM. � The writing timing is just after the abnormality occurred. 2-3-3. Abnormality mode display � Press the CH UP and CH DOWN buttons on the VTR simultaneously for more than 5s. � And then within 2s, press the STILL button on the remote control. � The system control mode at which the abnormality occurred is displayed at the channel display area, �E� is displayed at the hour digit, abnormality generation number is displayed at the minute digit, and the mechanism position is displayed in the second digit position. � The abnormality mode is displayed regardless of the power on off. Positions 0, 2, 4 exist as mechanism positions. For example, 8 shows a position between 7 and 9 (between playback position and review position).
Abnormal mechanism positions
� When the Counter Reset button is pressed in the display period, the abnormality display data is initialized and �-� is displayed.
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