SHARP XLHP550E
Service Manual

XL-HP550E

SAFETY PRECAUTION FOR SERVICE MANUAL
Precaution to be taken when replacing and servicing the Laser Pickup. The AEL (Accessible Emission Level) of Laser Power Output for this model is specified to be lower than Class 1 Requirements. However, the following precautions must be observed during servicing to protect your eyes against exposure to the Laser beam. (1) When the cabinet has been removed, the power is turned on without a compact disc, and the Pickup is on a position outer than the lead-in position, the Laser will light for several seconds to detect a disc. Do not look into the Pickup Lens. (2) The Laser Power Output of the Pickup inside the unit and replacement service parts have already been adjusted prior to shipping. (3) No adjustment to the Laser Power should be attempted when replacing or servicing the Pickup. (4) Under no circumstances look directly into the Pickup Lens at any time. (5) CAUTION - Use of controls or adjustments, or performance of procedures other than those specified herein may result in hazardous radiation exposure.
Laser Diode Properties Material: GaAIAs Wavelength: 780 nm Emission Duration: continuous Laser Output: max. 0.6 mW

IMPORTANT SERVICE NOTES
Before returning the unit to the customer after completion of a repair or adjustment it is necessary for the following withstand voltage test to be applied to ensure the unit is safe for the customer to use. Setting of Withstanding Voltage Tester and set.
Set name Withstanding Voltage Tester Test voltage Set time Set current (Cutoff current) Unit Judgment OK: The �GOOD� lamp lights. NG: The �NG� lamp lights and the buzzer sounds. set value 4,240 VPEAK 3,000 VRMS 6 secs 4 mA
SHORT-CIRCUIT AC POWER SUPPLY CORD CONNECT THE PROBE TO GND OF CHASSIS SCREW AC OUT UNIT WITHSTANDING VOLTAGE TESTER PROBE

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