Sony xr 4950 x service manual
This is the 36 pages manual for sony xr 4950 x service manual.
Read or download the pdf for free. If you want to contribute, please upload pdfs to audioservicemanuals.wetransfer.com.
Extracted text from sony xr 4950 x service manual (Ocr-read)
Page 1
2 XR-4950X TABLE OF CONTENTS 1. GENERAL Location of Controls ....................................................... 3 2. DISASSEMBLY 2-1. Disassembly Flow ........................................................... 7 2-2. Sub Panel Assy ................................................................ 7 2-3. Mechanism Deck (MG-25F-136) ................................... 8 2-4. MAIN Board ................................................................... 8 2-5. Heat Sink (2P) ................................................................. 9 3. ASSEMBLY OF MECHANISM DECK 3-1. Assembly Flow ................................................................ 10 3-2. Housing ........................................................................... 11 3-3. Arm (Suction) ................................................................. 11 3-4. Lever (LDG-A)/(LDG-B) ............................................... 12 3-5. Gear (LDG-FT) ............................................................... 12 3-6. Guide (C) ......................................................................... 13 3-7. Mounting Position of Capstan/Reel Motor (M901) ....... 13 4. MECHANICAL ADJUSTMENTS ....................... 14 5. ELECTRICAL ADJUSTMENTS Tape Deck Section .......................................................... 14 Tuner Section .................................................................. 14 6. DIAGRAMS 6-1. Note for Printed Wiring Boards and Schematic Diagrams ....................................................... 15 6-2. Printed Wiring Board – MAIN Board – ......................... 17 6-3. Schematic Diagram – MAIN Board (1/2) – ................... 18 6-4. Schematic Diagram – MAIN Board (2/2) – ................... 19 6-5. Printed Wiring Board – SUB Board – ............................ 20 6-6. Schematic Diagram – SUB Board – ............................... 20 6-7. Printed Wiring Board – KEY Board – ............................ 22 6-8. Schematic Diagram – KEY Board – .............................. 23 6-9. IC Pin Function Description ........................................... 24 7. EXPLODED VIEWS 7-1. General Section ............................................................... 26 7-2. Front Panel Section ......................................................... 27 7-3. Mechanism Deck Section (MG-25F-136) ...................... 28 8. ELECTRICAL PARTS LIST ............................... 29Notes 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. Flexible Circuit Board Repairing - Keep the temperature of the soldering iron around 270 ˚C 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.
Page 2
3 XR-4950X SECTION 1 GENERAL This section is extracted from instruction manual. 4 Location of controls Refer to the pages listed for details. 1MENU button 6, 8, 9, 10, 11, 14 2Volume control dial 3SOURCE (TUNER/TAPE) button 6, 7, 9, 10 4PRST +/– (cursor up/down) buttons 6, 8, 9, 10, 11, 14 During radio reception: Preset stations select 10 5MODE (o) button 7, 8, 9, 10 During tape playback: Playback direction change 7 During radio reception: BAND select 9, 10 6Display window 7 Z (eject) button (located on the front side of the unit behind the front panel) 7 8OPEN button 5, 7, 15 9D-BASS button 14 q;SOUND button 13 qaOFF button* 5, 6, 7qsReset button (located on the front side of the unit behind the front panel) 5 qdSEEK/AMS –/+ (cursor left/right) buttons 6, 7, 8, 9, 10, 11, 13, 14 Seek 10 Automatic Music Sensor 7 Manual search 10 qfENTER button 6, 8, 9, 10, 11, 14 qgNumber buttons During radio reception: Preset number select 9, 10 During tape playback: (1)REP 8 *Warning when installing in a car without ACC (accessory) position on the ignition key switch Be sure to press (OFF) on the unit for two seconds to turn off the clock display after turning off the engine. When you press (OFF) only momentarily, the clock display does not turn off and this causes battery wear. SOURCE MODE OFF ENTER MENU SOUND 1 2 3 4 56 -SEEK/AMS REP OPEN D-BASS XR-4950X