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CDX-4000RV AEP Model UK Model SERVICE MANUAL SUPPLEMENT-2 File this supplement with the service manual. Subject : Change of Main, Sub (CD) and Key Boards (ECN-CSA01521/CSA02901) TABLE OF CONTENTS 1. CHANGE OF MAIN, SUB (CD) AND KEY BOARDS 1-1. Discrimination ... 2 1-2. Diagrams · Printed Wiring Board ­Main Section­ ... 4 · Schematic Diagram ­Main Section (1/3)­ ... 6 · Schematic Diagram ­Main Section (2/3)­ ... 7 · Schematic Diagram ­Main Section (3/3)­ ... 8 · Schematic Diagram ­Sub (CD) Section­ ... 9 · Printed Wiring Board ­Sub (CD) Section­ ... 10 · Printed Wiring Board ­Key Section­ ... 11 · Schematic Diagram ­Key Section­ ... 12 1-3. ELECTRICAL PARTS LIST ... 13 1 1. Change of Main, Sub (CD) and Key Boards When performing service and inspection, check the part number of the main, sub (CD) and key boards. 1-1. Discrimination -MAIN BOARD (COMPONENT SIDE)- Main board part No. Former:1-677-055-11 New :1-677-055-12 -SUB(CD) BOARD (COMPONENT SIDE)- Sub(CD) board part No. Former:1-677-056-11 New :1-677-056-12 -KEY BOARD (COMPONENT SIDE)- Key board part No. Former:1-676-602-12 New :1-676-602-13 2 CDX-4000RV 1-2. Diagrams THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS. (In addition to this, the necessary note is printed in each block.) · Refer to page. ( ) : Refer to page of supplement-2. < > : Refer to page of service manual. for schematic diagram: · All capacitors are in µF unless otherwise noted. pF: µµF 50 WV or less are not indicated except for electrolytics and tantalums. · All resistors are in and 1/4 W or less unless otherwise specified. · % : indicates tolerance. f · : internal component. · C : panel designation. · U : B+ Line. · Power voltage is dc 14.4V and fed with regulated dc power supply from ACC and BATT cords. · Voltages are taken with a VOM (Input impedance 10 M). Voltage variations may be noted due to normal production tolerances. · Waveforms are taken with a oscilloscope. Voltage variations may be noted due to normal production tolerances. · Circled numbers refer to waveforms. · Signal path. F : FM f : MW J : CD for printed wiring boards: · X : parts extracted from the component side. · Y : parts extracted from the conductor side. a : Through hole. · · b : Pattern from the side which enables seeing. (The other layer's patterns are not indicated.) Caution: Pattern face side: (Side B) Parts face side: (Side A) Parts on the pattern face side seen from the pattern face are indicated. Parts on the parts face side seen from the parts face are indicated. 3 3 CDX-4000RV · PRINTED WIRING BOARD -- MAIN SECTION -- · Semiconductor Location (Side A) Ref.