Pioneer mjl 77 service manual

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MJ-L77 2 IMPORTANT THIS PIONEER APPARATUS CONTAINS LASER OF CLASS 1. SERVICING OPERATION OF THE APPARATUS SHOULD BE DONE BY A SPECIALLY INSTRUTED PERSON. LASER DIODE CHARACTERISTICS MAXIMUM OUTPUT POWER: 32 mW WAVELENGTH: 785 nm Control method of the current through a laser diode. The resistor R105 on the CORE MAIN UNIT ASSY (For MD mechanism assy) are for the limiting of current through a laser diode. Control method of the laser output power The laser pickup assy provide the photo-diodes and APC (Auto Power Control) circuit. The photo-diode detect output of the laser diode then IC104 control the APC circuit according to the signal voltage of the photo-diode via IC101. The Variable resistancer on the FPC in the Laser pickup assy can be adjusted the output level of Laser diode to fix the rated output level. Laser Interlock Switch The loading position detect switch S101 is set to Ò LOAD ON Ó (ON: low level, OFF: high level) position, IC104 get the Ò LOAD Ó signal, and hand the laser Ò LDON Ó signal to No. 9 terminal (LDON) of the Laser pickup assy. Then a laser diode can be lighted exept when the level of signal ÒLOAD Ó is low. Additional Laser Caution 1. SAFETY INFORMATION 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 repair complex products such as those covered by this manual. 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 and refer the repair to a qualified service technician. WARNING This product contains lead in solder and certain electrical parts contain chemicals which are known to the state of California to cause cancer, birth defects or other reproductive harm. Health & Safety Code Section 25249.6 Ð Proposition 65 * Refer to page 33. LABEL CHECK NVXK typeMYXK type (Printed on the Rear Panel)

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MJ-L77 3 2. EXPLODED VIEWS AND PARTS LIST NOTES : Parts marked by Ò NSP Ó are generally unavailable because they are not in our Master Spare Parts List. The mark found on some component parts indicates the importance of the safety factor of the part. Therefore, when replacing, be sure to use parts of identical designation. Screw adjacent to mark on the product are used for disassembly. 2.1 PACKING Mark MYXK type NVXK type (2) CONTRAST TABLE MJ-L77/MYXK and NVXK are constructed the same except for the following: 1 Power Cord ADG7010 ADG7009 3 Operating Instructions ARC7251 Not used (Swedish/Dutch/Portuguese/Spanish) 4 Operating Instructions ARE7222 Not used (French/English/Italian/German) 5 Operating Instructions (English) Not used ARB7196 9 Packing Case AHD7769 AHD7801 11 Sub Packing Not used AHD7770 12 Fuse (5A) Not used AEK7001 Part No. Remarks Symbol and Description No. 1 12 11 NVXK type only 3 4 513 10 9 8(1/2) 2 8(2/2) 7(2/2) 7(1/2) MYXK type onlyMYXK type only MYXK type only NVXK type only6 1 Mark No. Description Part No. (1) PACKING PARTS LIST 1 Power Cord See Contrast table (2) NSP 2 Warranty Card ARY7022 3 Operating Instructions See Contrast table (2) 4 Operating Instructions See Contrast table (2) 5 Operating Instructions See Contrast table (2) 6 Optical Digital Cord (L= 0.5m) RKX1031 7 Pad Front AHA7260 8 Pad Rear AHA7261 9 Packing Case See Contrast table (2) 10 Sheet (750 ´ 600 ´ 0.5) Z23Ð007 11 Sub Packing See Contrast table (2) 12 Fuse (5A) See Contrast table (2) 13 Polyethylene Bag Z21Ð038 (0.03 ´ 230 ´ 340)