Sony mdx c 7900 service manual

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-� 2 -� TABLE OF CONTENTS 1. SERVICE NOTE ....................................................... 3 2. GENERAL Location of Controls (MDX-C7900) .............................. 4 Location of Controls (MDX-C7900R) ........................... 5 Resetting the Unit ........................................................... 6 Detaching the Front Panel ............................................... 6 Preparing the Rotary Commander .................................. 6 Setting the Clock ............................................................. 6 Installation (US, Canadian) ............................................ 7 Installation (AEP, UK, E) ............................................... 8 Connections ..................................................................... 10 3. DISASSEMBLY ......................................................... 13 4. ELECTRICAL ADJUSTMENTS Test Mode ........................................................................ 18 MD Section ..................................................................... 18 Tuner Section .................................................................. 18 5. DIAGRAMS 5-1. Block Diagram -� SERVO Section -� ............................... 21 5-2. Block Diagram -� MAIN Section -� ................................. 23 5-3. Block Diagram -� DISPLAY/KEY CONTROL Section -� ........................ 25 5-4. Block Diagram -� BUS CONTROL/POWER SUPPLY Section -� ........... 27 5-5. Printed Wiring Boards -� MECHANISM DECK Section -� ................................. 29 5-6. Schematic Diagram -� MECHANISM DECK Section -� ................................. 31 5-7. Schematic Diagram -� MAIN Section -� .......................... 35 5-8. Printed Wiring Board -� MAIN Section -� ....................... 39 5-9. Printed Wiring Board -� PANEL Section -� ..................... 43 5-10. Schematic Diagram -� PANEL Section -� ........................ 45 5-11. IC Pin Function Description ........................................... 55 6. EXPLODED VIEWS ................................................ 64 7. ELECTRICAL PARTS LIST ............................... 68 Ver 1.1

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Ð 3 Ð Flexible Circuit Board Repairing ¥ Keep the temperature of the soldering iron around 270 ûC dur- ing repairing. ¥ Do not touch the soldering iron on the same conductor of the circuit board (within 3 times). ¥ Be careful not to apply force on the conductor when soldering or unsoldering. Notes on chip component replacement ¥ Never reuse a disconnected chip component. ¥ Notice that the minus side of a tantalum capacitor may be dam- aged by heat. ATTENTION AU COMPOSANT AYANT RAPPORT Ë LA SƒCURITƒ! LES COMPOSANTS IDENTIFIƒS PAR UNE MARQUE ! SUR LES DIAGRAMMES SCHƒMATIQUES ET LA LISTE DES PIéCES SONT CRITIQUES POUR LA SƒCURITƒ DE FONCTIONNEMENT. NE REMPLACER CES COM- POSANTS QUE PAR DES PIéCES SONY DONT LES NUMƒROS SONT DONNƒS DANS CE MANUEL OU DANS LES SUPPLƒMENTS PUBLIƒS PAR SONY.SAFETY-RELATED COMPONENT WARNING!! COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE WITH MARK ! ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB- LISHED BY SONY. CAUTION Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous ra- diation exposure. SECTION 1 SERVICE NOTE ¥ Type A/B Discrimination [MAIN BOARD] (Component Side) IC700 MB90574PFV-G-113-BND (C7900R: Type A) MB90574PFV-G-114-BND (C7900: Type A) MB90F574PFV-G-113 (C7900R: Type B) MB90F574PFV-G-114 (C7900: Type B)