Pioneer deh-3900mp service manual

Module : Circuit Descriptions, Mech. Descriptions, Disassembly. A specially instructed person should do servicing operation of the apparatus. Transistors Q in PCB drive the laser diodes. When Q is shorted between their terminals, the laser diodes will radiate beam.

If the top cover is removed with no disc loaded while such short-circuit is continued,. During repair or tests, minimum distance of 13 cm from the focus lens must be kept. During repair or tests, do not view laser beam for 10 seconds or longer.

This service manual is intended for qualified service technicians; it is not meant for the casual do-it-yourselfer. Qualified technicians have the necessary test equipment and tools, and have been trained to properly and safely. Improperly performed repairs can adversely affect the safety and reliability of the product and may void the warranty. If you are not qualified to perform the repair of this product properly and safely, you should not risk trying to do so.

You should conform to the regulations governing. Before disassembling the unit, be sure to turn off. Unplugging and plugging the connectors. To protect the pickup unit from electrostatic discharge. And since these CDs hold so much data, you'll be happy to know that Pioneer MP3 headunits also include a random play mode.

You'll also be pleasantly surprised to find that our players support ID3 Tags and WMA text, which display artist, title, track and album information, just like your computer. Right from your headunit, you can adjust your High-Pass Filter, which will protect your front and rear speakers from power-robbing deep bass notes.

Now, use the Subwoofer adjustments to make sure your bass performance has the kick you like. In fact, you can just hit the Subwoofer Direct button to fine tune the settings at any time! It also means that your music will be cleaner at higher volumes because you're not pushing the limits of the amplification circuit.

For clean, efficient power that will rock your vehicle, you found the right CD Receiver. Satellite Radio Ready? Satellite Radio. Please be sure to confirm and follow these procedures. Product safety Please conform to product regulations such as safety and radiation regulations , and maintain a safe servicing environment by following the safety instructions described in this manual. Use genuine parts. Be sure to use important parts for safety. When you solder while repairing, please be sure that there are no cold solder and other debris.

Soldering should be finished with the proper quantity. Refer to the example 4 Make sure the screws are tightly fastened. Please be sure that all screws are fastened, and that there are no loose screws. Please be sure that all connectors are inserted, and that there are no imperfect insertion. Please replace the wiring and cables to the original state after repairs. In addition, be sure that there are no pinched wires, etc.

Please check that neither solder debris nor screws remain inside the product. Damaged power cords may lead to fire accidents, so please be sure that there are no damages. If you find a damaged power cord, please exchange it with a suitable one. When spark traces or similar marks are found on the power supply plug, please check the connection and advise on secure connections and suitable usage. Damaged power cords may lead to fire accidents, so please be sure that there are no damages.

When spark traces or similar marks are found on the power supply plug, please check the connection and advise on secure connections and suitable usage. Please exchange the power cord if necessary. When you perform repairs, please pay attention to static electricity, furniture, household articles, etc. To keep the original performance of the products, optimum adjustments and confirmation of characteristics within specification.

Make sure the proper amount is applied. For parts that require cleaning, such as optical pickups, tape deck heads, lenses and mirrors used in projection monitors, proper cleaning should be performed to restore their performances. To protect products from damages or failures during transit, the shipping mode should be set or the shipping screws should be installed before shipment.

Please be sure to follow this method especially if it is specified in this manual. In the case of no amount instructions,apply as you think it appropriate. RDS CK. VDD 3. Therefore, when replacing, be sure to use parts of identical designation. C CN A-a A-b. Decimal points for resistor.

NOTE : Symbol indicates a resistor. No differentiation is made between chip resistors and. Symbol indicates a capacitor. No differentiation is made between chip capacitors and discrete capacitors. Welcome to ManualMachine.