SONY SRF-M55 free download

File name SRF-M55.pdf

SRF-M55 SERVICE MANUAL Ver 1.0 1999.09 AEP Model E Model Chinese Model SPECIFICATIONS FM STEREO PLL SYNTHESIZED RADIO MICROFILM TABLE OF CONTENTS Specifications ... 1 1. GENERAL Location and Function of Controls ... 2 Flexible Circuit Board Repairing · Keep the temperature of the soldering iron around 270°C during 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 damaged by heat. 2. DISASSEMBLY 2-1. "Cabinet ASSY, Front", "Cabinet ASSY, Rear" ... 2-2. Main Board ... 2-3. LCD201 ... 2-4. Microcomputer Board ... 3 3 4 4 3. ADJUSTMENTS ... 5 4. DIAGRAMS 4-1. Explanation of IC Terminals ... 6 4-2. Block Diagrams ... 7 4-3. Printed Wiring Boards ... 10 4-4. Schematic Diagram ... 13 5. EXPLODED VIEW ... 17 6. ELECTRICAL PARTS LIST ... 18 SECTION 1 GENERAL LOCATION AND FUNCTION OF CONTROLS ­2­ SECTION 2 DISASSEMBLY r The equipment can be removed using the following procedure. Cabinet ASSY, Front Set Cabinet ASSY, Rear Main board LCD201 Microcomputer board Note : Follow the disassembly procedure in the numerical order given. 2-1. "CABINET ASSY, FRONT", "CABINET ASSY, REAR" Cabinet ASSY, front 2 Claws 5 LCD flexible board (13 core) 2 Claw 3 4 Flexible board (10 core) 2 Claws Cabinet ASSY, rear 1 Screws (B1.7x8) 2-2. MAIN BOARD Button (power) 2 Main board 4 Lid, battery case 3 Claw 1 Cabinet ASSY, front 3 Claw ­3­ 2-3. LCD201 LCD201 2 Cabinet ASSY, front 1 Claws 2-4. MICROCOMPUTER BOARD 1 Screws (1.4) Microcomputer board 5 4 Claw 4 Claws Cover, side 3 Cabinet ASSY, rear 2 Claws ­4­ SECTION 3 ADJUSTMENTS FM Section Setting : FM RF signal generator 0.01µF TP (ANT) 22.5kHz frequency deviation by 400Hz signal. Output level : as low as possible level meter 16 set 0 dB=1µV FM STEREO (19kHz) Adjustment Setting : FM RF signal generator 0.01µF TP (ANT) Carrier frequency : 98MHz Modulation : 1kHz, 22.5kHz deviation Output level : 1mV (more than 60dB) Procedure : 1. Connect the frequency counter to TP (19kHz). 2. Turn the set to 98MHz. 3. Adjust RV1 for 19kHz reading frequency counter. Standard Value : 18.9 ­19.1kHz Connection: frequency counter TP