Sony MDS-NT1 service manual Precautions For Checking Laser Diode Emission

MDS-NT1

5-2. PRECAUTIONS FOR CHECKING LASER DIODE EMISSION

To check the emission of the laser diode during adjustments, never view directly from the top as this may lose your eye-sight.

5-3. PRECAUTIONS FOR USE OF OPTICAL PICK- UP (KMS-262A/262E)

As the laser diode in the optical pick-up is easily damaged by static electricity, solder the laser tap of the flexible board when using it. Before disconnecting the connector, desolder first. Before con- necting the connector, be careful not to remove the solder. Also take adequate measures to prevent damage by static electricity. Handle the flexible board with care as it breaks easily.

pick-up flexible board

laser tap

Optical pick-up flexible board

5-4. HOW TO IDENTIFY OPTICAL PICK-UP KMS- 262A/KMS-262E

This set uses optical pick-up KMS-262E in the production, but for the repair, only the KMS-262A is supplied. As a result, two types of optical pick-ups are used for this set, and the specified values for the check and adjustment of the laser power vary depending on the type. Therefore, in performing the check and adjustment of the laser power, first make sure the type of optical pick-up. The type of optical pick-up can be identified as follows.

– KMS-262A	–	– KMS-262E –
[Top view]	[Side view]	[Top view] [Side view]

TYPE2 VR (small) TYPE3 VR (large)

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