5
2 Precaution on handling of Optical pick-up (KMS-260B)
The laser diode in an optical pick-up is easy to be subject to electrostatic destruction. Therefore, solder-bridge the
laser tap on the flexible board when handling the optical pick-up.
When removing the flexible board from the connector, make a solder bridge in advance, then remove the board. Be
careful not to remove the solder bridge before inserting the connector. Moreover, take careful measures against
electrostatic destruction. The flexible board is cut easily. Handle the flexible board with care.
3 Precaution during adjustment
1) Perform the adjustment and confirmation marked with "O" in the order shown in the table when the parts below
are replaced.
BD board
Optical pick-up
IC6 D101 IC1,
IC2,
IC10
1.Temperature compensation offset adjustment
X
O
O
O
2. Laser power adjustment
O
O
X
O
3.Trtvense adjustment
O
O
X
O
4. Focus bias adjustment
O
O
X
O
5. Error rate confirmation
O
O
X
O
2) In the test mode, perform the adjustment. After adjustment is completed, chancel the test mode.
3) Perform the adjustment in the order described.
4) Use the following tools and measurement equipment.
CD test disc TGYS-1
Laser power meter
Oscilloscope (with bandwidth of more than 40 M Ohms)
(Calibrate the probe before measurement)
Digital voltmeter
Thermometer
5) Take care that VC and GND (ground) are not connected on the oscilloscope when two or more signals are moni-
tored on the oscilloscope. (VC and GND are short-circuited in this case,)
4 Creating the recordable continuous recording disc
This disc is used for focus bias adjustment and error rate confirmation. How to create the recordable continuous
recording disc is 5-5
5 Offset Adjustment
No. Kay
Display/Function
1
MULTI JOG
Select [TEMP ADJUST]
2
PLAY
[TEMP = xx (yy)]
(xx = compensation data, yy = setting temperature
3
MULTI JOG
Input "yy" with present temp.
4 PL AY
[TEMP=**SAVE]
[TEMP ADJUST] in writing data
Summary of Contents for MD110
Page 11: ...9 10 3 WIRING DIAGRAM ...
Page 12: ...4 BLOCK DIAGRAM 11 12 ...
Page 13: ...13 14 5 SCHEMATIC DIAGRAM ...
Page 16: ...19 20 FRONT BOARD Q302 Q303 Q306 Q300 Q301 Q307 ...
Page 18: ...22 IC2 KIC9459N PIN CONNECTION PIN DESCRIPTION ...
