Sony HCD-SLK1i Service Manual - Page 4
Hcd-slk1i/slk2i, Servicing, Notes
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HCD-SLK1i/SLK2i SECTION 1 SERVICING NOTES NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT The laser diode in the optical pick-up block may suffer electrostatic break-down because of the potential difference generated by the charged electrostatic load, etc. on clothing and the human body. During repair, pay attention to electrostatic break-down and also use the procedure in the printed matter which is included in the repair parts. The flexible board is easily damaged and should be handled with care. NOTES ON LASER DIODE EMISSION CHECK The laser beam on this model is concentrated so as to be focused on the disc reflective surface by the objective lens in the optical pickup block. Therefore, when checking the laser diode emission, observe from more than 30 cm away from the objective lens. NOTE FOR REPLACEMENT OF THE MS-214 BOARD When the MS-214 board is defective, exchange the entire MD (AU) ASSY. NOTE FOR REPLACEMENT OF THE TOUCH PANEL BOARD When the TOUCH PANEL board is defective, exchange the entire mounted board. MODEL IDENTIFICATION - Bottom view - Model Number Label UNLEADED SOLDER Boards requiring use of unleaded solder are printed with the leadfree mark (LF) indicating the solder contains no lead. (Caution: Some printed circuit boards may not come printed with the lead free mark due to their particular size) : LEAD FREE MARK Unleaded solder has the following characteristics. • Unleaded solder melts at a temperature about 40 °C higher than ordinary solder. Ordinary soldering irons can be used but the iron tip has to be applied to the solder joint for a slightly longer time. Soldering irons using a temperature regulator should be set to about 350 °C. Caution: The printed pattern (copper foil) may peel away if the heated tip is applied for too long, so be careful! • Strong viscosity Unleaded solder is more viscous (sticky, less prone to flow) than ordinary solder so use caution not to let solder bridges occur such as on IC pins, etc. • Usable with ordinary solder It is best to use only unleaded solder but unleaded solder may also be added to ordinary solder. RELEASING THE DISC SLOT LOCK The disc slot lock function for the antitheft of an demonstration disc in the store is equipped. Releasing Procedure: 1. Press the [?/1] button to turn on the system. 2. Touch the [HOME] sensor. 3. Touch the [M], [m], [