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Service Manual KEH-P7800R/X1N/EW ORDER NO. CRT2305 MULTI-CD CONTROL HIGH POWER CASSETTE PLAYER WITH RDS TUNER KEH-P7800R KEH-P6800R NOTE: - See the separate manual CX-631(CRT1640) for the cassette mechanism description. - The cassette mechanism assy employed in this model is one of 2L series. X1N/EW X1N/EW - Dolby noise reduction manufactured under license from Dolby Laboratories Licensing Corporation. "Dolby" and the double-D symbol are trademarks of Dolby Laboratories Licensing Corporation. CONTENTS 1. 2. 3. 4. 5. 6. SAFETY INFORMATION ...2 EXPLODED VIEWS AND PARTS LIST...2 SCHEMATIC DIAGRAM ...14 PCB CONNECTION DIAGRAM ...26 ELECTRICAL PARTS LIST ...36 ADJUSTMENT ...46 7. GENERAL INFORMATION ...48 7.1 PARTS...48 7.1.1 IC ...48 7.1.2 DISPLAY ...53 7.2 DIAGNOSIS...54 7.2.1 DISASSEMBLY ...54 7.2.2 TEST MODE ...55 7.3 BLOCK DIAGRAM...58 8. OPERATIONS AND SPECIFICATIONS ...59 PIONEER ELECTRONIC CORPORATION 4-1, Meguro 1-Chome, Meguro-ku, Tokyo 153-8654, Japan PIONEER ELECTRONICS SERVICE INC. P.O.Box 1760, Long Beach, CA 90801-1760 U.S.A. PIONEER ELECTRONIC [EUROPE] N.V. Haven 1087 Keetberglaan 1, 9120 Melsele, Belgium PIONEER ELECTRONICS ASIACENTRE PTE.LTD. 253 Alexandra Road, #04-01, Singapore 159936 C PIONEER ELECTRONIC CORPORATION 1998 K-ZZS. NOV. 1998 Printed in Japan KEH-P7800R,P6800R 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. 2. EXPLODED VIEWS AND PARTS LIST 2.1 PACKING - KEH-P7800R/X1N/EW 2 3 6 5 4 9 12 24 14 15 1 7 8 13 11 10 2 KEH-P7800R,P6800R 15 20 22 21 19 17 16 18 23 NOTE: - Parts marked by "*" are generally unavailable because they are not in our Master Spare Parts List. - Screws adjacent to mark on the product are used for disassembly. - PACKING SECTION PARTS LIST Mark No. Description 1 2 3 4 5 * 6 7 8-1 8-2 8-3 8-4 8-5 8-6 8-7 8-8 Cord Assy Accesso