Sony HCD-HPR90 Service Manual - Page 4

HCD-HPR90/HPR99XM Ver. 1.1 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. MODEL IDENTIFICATION - Rear Panel - 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. 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 viscou-s (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 ANTITHEFT LOCK The disc table lock function for the antitheft of an demonstration disc in the store is equipped. Releasing Procedure : 1. Press the I/1 button to turn the power on. 2. While pressing the x button, press the Z button until "UNLOCKED" displayed on the fluorescent indicator tube (around 5 seconds). Note: When "LOCKED" is displayed, the antitheft lock is not released by turning power on/off with the I/1 button. PART No. MODEL HPR90: US HPR90: CND HPR90: E HPR90: MX HPR90: E51 HPR90: AR HPR90: SP HPR90: AUS HPR99XM: US HPR99XM: CND PART No. 2-670-257-0[] 2-670-257-1[] 2-670-257-2[] 2-670-257-3[] 2-670-257-4[] 2-670-257-5[] 2-670-257-6[] 2-670-257-7[] 2-670-258-0[] 2-670-258-1[] • Abbreviation AR : Argentina model AUS : Australian model CND : Canadian model E51 : Chilean and Peruvian models MX : Mexican model SP : Singapore model 4