Sony cdx gt 120 service manual

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3 CDX-GT22W/GT120/GT220 -UNLEADED SOLDER Boards requiring use of unleaded solder are printed with the lead- free mark (LF) indicating the solder contains no lead. (Caution: Some printed circuit boards may not come printed withthe lead free mark due to their particular size.) : LEAD FREE MARK Unleaded solder has the following characteristics. - Unleaded solder melts at a temperature about 40°C higher than ordinary solder. Ordinary soldering irons can be used but the iron tip has to be applied to the solder joint for a slightly longer time. Soldering irons using a temperature regulator should be set to about 350°C. Caution: The printed pattern (copper foil) may peel away if the heated tip is applied for too long, so be careful! - Strong viscosity Unleaded solder is more viscous (sticky, less prone to flow) than ordinary solder so use caution not to let solder bridges occur such as on IC pins, etc. - Usable with ordinary solder It is best to use only unleaded solder but unleaded solder may also be added to ordinary solder. - CD Playback You can play CD-DA (also containing CD TEXT) and CD-R/ CD-RW (MP3/WMA files). T ype of discs Label on the disc CD-DA MP3 * WMA * *CDX-GT22W/GT220 only TABLE OF CONTENTS 1. SERVICE NOTE ........................................................ 4 2. GENERAL Location of Controls ........................................................ 5 Connections ..................................................................... 5 3. DISASSEMBLY 3-1. Sub Panel Assy ................................................................ 8 3 -2. CD Mechanism Block ..................................................... 8 3-3. Main Board ...................................................................... 9 3-4. Servo Board ..................................................................... 9 3-5. Chassis (T) Sub Assy ....................................................... 10 3 -6. Roller Arm Assy .............................................................. 10 3-7. Chassis (OP) Assy ........................................................... 11 3-8. Chucking Arm Sub Assy ................................................. 11 3-9. Sled Motor Assy .............................................................. 12 3-10. Optical Pick-up Section ................................................... 13 3-11. Optical Pick-up ................................................................ 13 4. DIAGNOSIS FUNCTION ........................................ 14 5. DIAGRAMS 5-1. Block Diagram –Main Section– ...................................... 17 5-2. Block Diagram –Display Section– .................................. 18 5-3. Printed Wiring Board –Main Section– ............................ 19 5-4. Schematic Diagram –Main Section (1/4)– ...................... 20 5-5. Schematic Diagram –Main Section (2/4)– ...................... 21 5-6. Schematic Diagram –Main Section (3/4)– ...................... 22 5-7. Schematic Diagram –Main Section (4/4)– ...................... 23 5-8. Printed Wiring Board –Key Section– .............................. 24 5-9. Schematic Diagram –Key Section– ................................. 25 6. EXPLODED VIEWS 6-1. Main Section .................................................................... 29 6-2. Front Panel Section ......................................................... 30 6 -3. CD Mechanism Section (MG-101TC-188//C) ................ 31 7. ELECTRICAL PARTS LIST .................................. 32