Pioneer PD-X99M Service Manual page 34

PD-xXSSM
NOTE:
1) The following adjustment should be performed in the Test Mode.
Refer to page 35 to set the player in Test Mode.
2) The following adjustment except [1. LD OUTPUT POWER VERIFICATION] should be performed with a
Test Disc (YEDS-7).
Place the Test Disc recorded side up in a magazine and load the magazine in the player.
3) The description of the following adjustments starts from "STOP".
LD (LASER DIODE) OUTPUT POWER VERIFICATION
NOTE:
This item can be skipped under normal service. It should be verified only when the laser power seems
to be weak or the laser diode seems to be defective.
To verify the laser output power, the pickup has to be
removed from Mechanism Chassis in the following proce-
dure.
¢ Turn power switch off.
Unbelt belt A.
Remove guide bar retainer.
Unhook drive screw.
Slowly lift pickup assembly upside down keeping flat
cable connected. Be careful not to short the P.C. board
on the pickup to chassis.
Set the player to test mode.
Place the sensor of Laser Power Meter (LPM-8000)
above the objective lens.
Press TRACK REV key to turn the laser on.
0.26mW + 0.02mW Verify that the laser output power is within the speci-
fied range (0.26+0.02mW).
if not, adjust VR1 on the pickup to satisfy the specifi-
Cation.
Turn power switch off.
Reassemble the parts.
VR2 OV +10mV * Connect Oscilloscope or Volt meter to CN101 pin9
(TR.OF) TR.RT (Tracking Return). Adjust VR2 TR.OF (Tracking
Offset) so that the voltage at CN101 pin9 becomes
OV + 10mV.
VR6 Connect Oscilloscope or Volt meter to CN101 pin3
(FO.OF) FO.ER (Focus Error).
Adjust VR6 FO.OF (Focus Offset } so that the voltage
at CN101 pin3 becomes OV + 10mV.
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