Sony xm 1252 gtr service manual

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2 TABLE OF CONTENTS 1. GENERAL Location and Function of Controls .......................................... 3 Connections ........................................................................\ ..... 4 2. DISASSEMBLY 2-1. Cover Assy ........................................................................\ .. 7 2-2. Top Plate Section ................................................................. 8 2-3. AMP Board Section ............................................................ 8 2-4. Front Panel ........................................................................\ .. 9 2-5. LED ILLUM Board, LED PROT Board ............................. 9 3. ELECTRICAL ADJUSTMENT .................................... 10 4. DIAGRAMS 4-1. Printed Wiring Boards ....................................................... 12 4-2. Schematic Diagram –AMP Section (1/2)– ........................ 13 4-3. Schematic Diagram –AMP Section (2/2)– ........................ 14 5. EXPLODED VIEWS 5-1. Heat Sink (Main) Section .................................................. 15 5-2. AMP Board Section .......................................................... 16 6. ELECTRICAL PARTS LIST ........................................ 17 Notes on Chip Component Replacement -N ever reuse a disconnected chip component. - Notice that the minus side of a tantalum capacitor may be dam- aged by heat. SAFETY-RELATED COMPONENT WARNING!! COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE P ART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY. ATTENTION AU COMPOSANT AYANT RAPPORT À LA SÉCURITÉ!! LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE 0 SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS QUE PAR DES PIÈCES SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY. XM-1252GTR Note for Replacement of FET Change the both channels of FETs at the output stage. If one or both parts in the following combination is broken, the service kit should be ordered. Service kit part No. Q108, 110 X-3381-586-1 Q208, 210 Q109, 111X-3381-587-1 Q209, 211 Confirming the Operation Please confirm the car audio unit works even if REM OUT is not connected when you connect this set with the car audio unit by the HIGH LEVEL input.