attempt at the drive signal coming on.
20.Check the feedback from the spindle motor hall switches by monitoring pins 9 through 13 and pin 15 while cycling power and playing a disc in times 8 scan.
21.Check the spindle motor hall switches manu- ally by rotating the spindle motor with your finger while monitoring pins 9 through 13 and pin 15.
22.The dc drive voltages for the spindle motor hall switches are checked at pins 14 and 16.
Loading Motor Checks
1.Loading motor operation is checked at CN503.
2.The loading motor drive signal on pin 1 drives the tray out, and the loading motor drive signal on pin 2 pulls the tray in.
3.The tray position switch signal at pin 3 is high when the tray is out, and low when the tray is in.
4.The tray position switch signal at pin 4 is low when the tray is out, and high when the tray is in.
Color Difference Output Checks (CN302 - SD3006 Only)
1.Play a test disc with a straight color bar pattern.
2.Place the player in pause and switch to the
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color difference outputs on the back of the player.
3.Connect channel 1 of the scope to the lumi- nance output on pin 1 of CN302.
4.Connect channel 2 of the scope to the Cr signal output on pin 3, and ensure it is in sync with the luminance signal and the proper peak to peak voltage.
5.Connect channel 2 of the scope to the Cb signal output on pin 5, and ensure it is in sync with the luminance signal and the proper peak to peak voltage.
6.If the player won’t switch video modes, monitor pin 7 while moving the switch. The pin is high in the composite video mode, and low in the component video mode.
Summary
1.If the problem is isolated to the main board or the laser slide assembly, replace the board or the slide assembly.
2.Some parts on the laser slide assembly are replaced. These include the feed motor, the feed motor drive gears, and the hall switches.
3.If the problem is isolated to any of the other boards, repair them to the component level.
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