Akai DV-P4799KDMC Service Manual

Text of Akai DV-P4799KDMC User Guide:

• Akai DV-P4799KDMC, 1. General Section 1.1 Cautions/Warnings 1.1.1 Product Safety Notice Parts marked with the symbol in the schematic diagram have critical char- acteristics. Use ONLY replacement pares recommended by the manufacturer. It is recommended that the unit be operated from a suitable DC supply or batter- ies during initial check out procedures. 1.1.2 Leakage Current Check/Resistance Check Before returning the unit to the customer, make sure you make either (1) a leakage current chec

• Akai DV-P4799KDMC, 1.2.2 Laser Caution CAUTION Adjusting the knobs, switches, and controls , ect. Or taking actions not specified herein may result in a harmful emission of laser beams. This CD Changer must be adjusted and repaired only by qualified serv ice personnel. THIS IS COMPACT DISC PLAYER IS CLASSIFIED AS A CLASS LASER PRODUCT. THE LASS 1 LASER PRODUCT LABEL IS LOCATED ON THE REAR EX- TERIOR. 1.3. Precautions 1.3.1. ESD Precautions in Repairing 1.3.1.1 Do not apply excessive pressure on the mechanical parts (movi-

• Akai DV-P4799KDMC, 1.3.2. DVD Loading Unit Precautions When handing the Mechanism Block 1.3.2.1 Do not loosen any screws in the Pickup Block. 1.3.2.2 Do not adjust any screws in the Mechanism Block except for Tilt Adjust Screws , as they are adjusted precisely at the factory. 1.3.2.3 Replacement of the Pickup Block is impossible. Always repl- ace the Traverse Ass s when the Pickup Block needed to be replace . Do not touch the lens or lens holder

• Akai DV-P4799KDMC, Press 1 key , Show Message on TV UPGRADE FILE DETECTED UPGRADE ? File Copy The tray is automatic to open, take disc away. UPGRADE FILE DETECTED UPGRADE ? Upgrading At this time, please wait a few minutes, DVD is downloading code to flash, After Logo will be show on TV again, the update process finish. Notice: During upgrading , don s turn off power. Displaying the software Version Number After opening the tray, press the following keys on the remote control , DISPLAY (Up) (Down) (Left) (Right) then the software version number appears

• Akai DV-P4799KDMC, 3.2. Read Disc Trouble Service Flow Chart Read disc problem in a DVD player is a very complicated issue that may involve complex issues. This problem is not only relation to the electronic circuit, but also very much relation to the operation environment. DVD loading unit is a very complicate part that contains big number of ESD com- ponents , which require specific equipment, tools and technique to repair; In ge- neral, service technician is not suggested to disassemble the DVD loading unit. It is suggest proving the trouble and replacing the complete DVD loading unit, in- stead of repairing the

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