AIWA XPSP90
Manual de Servicio

The tracking balance set value is displayed by hexadecimal notation in the 16 steps. Display range of set value: 00 to 0F Default value of setting (center value): 08 1 Tracking balance check � Test point: TEO & VC � Test disc: TCD-782 Press the DSL key while in PLAY MODE then turned off tracking servo. Confirm that the TE waveform as shown below appears. Note)

� Test point: TEO & VC When the tracking gain is changed during the traverse mode, the waveform amplitude change can be confirmed. The manual control of the focus bias, tracking balance and tracking gain can be operated only when the test mode has started up. Microprocessor performs all items with automatic adjustment during the normal CD playback mode so that the manual operation is not possible. Even when the level setting is made during the manual operation in the test mode, the set values are reset when the machine exits the test mode, and the manually set values are not memorized too.

A VREF 0±10mV B A=B VOLT/DIV: 500mV TIME/DIV: 0.2mS

4. Display of Jitter Change Value
The jitter value is displayed during the focus bias check mode. The �00� display is equivalent to the jitter amount when a glass disc is played back. The display value shows the actual jitter deviated from the �00� value. The jitter value is displayed in the 256 steps from 00 to FF.

2 Tracking balance control by the manual control The tracking balance value can be set to any desired value by pressing the F. Skip key or B. Skip key during the tracking balance check mode. The 16 steps can be set in the range from 00 to 0F. (Center value: 08) 3) Tracking Gain (Radial Gain) When the machine enters the tracking gain check mode, the following display appears on LCD.

Bias set value Jitter display

Tracking gain

Tracking gain set value

The tracking gain set value is displayed by hexadecimal notation in the 16 steps. Display range of set value: 40 to 4F Default value of setting (center value): 48 1 Tracking gain control check by the manual control The tracking gain can be set to any desired value by pressing the F. Skip key or B. Skip key during the tracking gain check mode. The 16 steps can be set in the range from 40 to 4F. (Center value: 48) When any attempt is made to change the tracking gain using the F. Skip key or B. Skip key while observing the TEO waveform on an oscilloscope, the tracking gain change can be confirmed as follows. a) Traverse waveform amplitude change

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