Toshiba NTDVT006BK - Manual (Page 10)

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
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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