ELECTRIC ADJUSTMENT
All the MD blocks are adjusted and checked in the test mode.
If ONo Adjust� is displayed, perform the adjustments of 1 to 3.
1. Temperature Compensation Adjustment
*Normally, do not perform the temperature compensation adjustment.
If the adjustment value is extensively different, perform the adjustment as given below in a suitable environment for measuring
the correct temperature near the unit.
YTest point: Check the test point on the display.
YTool: Thermometer
1) After the MD test mode starts up, press the STOP button to display OALL SV OFF�.
2) Press the DISPLAY button to display OTEMP = $**�.
3) Press the PAUSE button to display OT + **C: + 00�.
4) Put the thermometer near the MD mechanism to measure the room temperature.
5) Check the value of the thermometer and press the B.SKIP button and F.SKIP button to adjust until the value is the same as ** on
the display. Then press the ENTER button to store the value.
6) After adjustment, press the STOP button to return the display to OALL SV OFF�.
If ONo Adjust� appears, perform 1) to 3) and press the ENTER button without changing the adjustment value with the B/F.SKIP
buttons.
2. Laser Power Adjustment
YTest point: Check the test point on the display./Pickup laser output
YTool: Laser power meter (meters that can measure up to 10 mW)
2-1. Playback Laser Power Adjustment
1) Press the MD EDIT button in the OALL SV OFF� state to change the display to OLASER READ�.
2) Press the PAUSE button once to display OLASER = $**�.
3) Set it to OLASER = $11� using the B.SKIP and F.SKIP buttons, and press the ENTER button.
4) Measure the pickup laser output using the laser power meter and adjust it using the B.SKIP button and F.SKIP button so that it is
around 0.68 mW.
5) After adjustment, press the STOP button to change the display to OALL SV OFF�.
2-2. Recording Laser Power Adjustment
1) Press the MD EDIT button three times in the OALL SV OFF� state to change the display to OLASER WRITE�.
2) Press the PAUSE button once to display OLASER = $**�.
3) Set it to OLASER = $9F� using the B.SKIP and F.SKIP buttons, and press the ENTER button.
4) Measure the pickup laser output using the laser power meter and adjust it so that it is around 0.68 mW.
5) After adjustment, press the STOP button to change the display to OALL SV OFF�.
Note:If the laser output exceeds 7.0 mW, the pickup may be damaged.
3. Automatic Sequence Adjustment (EFB/IVR/FOCUS AGC/TRACKING AGC adjustment)
YTest point: Check the test point on the display.
YTest disk: MDW-74, TGYS-1 or equivalent
3-1. Adjusting the MO Disk
1) Load the MDW-74.
2) Press the MD MODE button to display OSELECT GRV�.
3) Press the MD function button to display OAUTO ADJ�. After adjustment, ODONE� is displayed. (If the adjustment failed,
OFAILED� appears.)
4) Then, press the STOP button to return the display to OALL SV OFF�.
3-2. IVR, EFB, Focus/ Tracking/ Sled Gain Check of MO Disk
1) Move the pickup to the center of the disk using the B.SKIP button and F.SKIP button.
2) Press the PLAY button to display OFOCUS ON!�.
3) Press the ENTER button to display OALL SV ON�.
4) Press the STOP button and press the DISPLAY button twice.
Confirm that the values of OIV$**:EF$��� are within the range shown below. (hexadecimal)
IV$ O**� .......... 03 to 07
EF$ O��� ....... 09 to 12
IVREFB
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ACEC
