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WCS-999 SERVICE MANUAL US Model Canadian Model Ver 1.0 1999. 09 Receiver Transmitter SPECIFICATIONS WIRELESS MICROPHONE SYSTEM MICROFILM...
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TABLE OF CONTENTS Notes on chip component replacement • Never reuse a disconnected chip component. • Notice that the minus side of a tantalum capacitor may be dam- GENERAL ............aged by heat. DISASSEMBLY ............4 ELECTRICAL ADJUSTMENTS TX Section ..............6 RX Section ..............
SECTION 2 DISASSEMBLY Note: Follow the disassembly procedure in the numerical order given. TX BOARD 1 two screws (P2 × 6) 4 TX board 3 case (upper) 3 case (lower) 2 two claws ANTENNA SETTING TX board case (upper) cushion (lower), switch antenna case (upper) rear view –...
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RX BOARD 1 two screws (P2 × 6) 4 RX board 3 case (upper) 3 case (lower) 2 two claws ANTENNA SETTING RX board antenna case (upper) cushion (lower), switch case (upper) rear view – 5 –...
Specified value: 70 mA to 80 mA 2. TX Frequency Confirmation Setting: The WCS-999 is a wireless microphone system operating in the 900 frequency counter TX BASE MHz. This system comprises the transmitter unit and the receiver unit.
WCS-999 4-2. BLOCK DIAGRAM – RX Section – FILTER (REC OUT) LF51 10.7MHz POWER AMP IC1 (2/2) VREF FM DISCRI ANT2 LEAD FM FRONT-END, IF AMP, DET ANTENNA FRONT-END BLOCK DISCRIMI- IC1 (1/2) EXPANDER NATOR FM RF FM/AM FM IF...
WCS-999 4-4. SCHEMATIC DIAGRAM – TX Section – • • See page 21 for Waveforms. See page 22 for IC Block Diagrams. Note on Schematic Diagram: • All capacitors are in µF unless otherwise noted. pF: µµF 50 WV or less are not indicated except for electrolytics and tantalums.
SECTION 5 EXPLODED VIEWS (2) RX SECTION • IC Block Diagrams NOTE: – TX BASE Board – • -XX and -X mean standardized parts, so they • Items marked “*” are not stocked since they – RX BASE Board – may have some difference from the original are seldom required for routine service.
SECTION 6 RX BASE ELECTRICAL PARTS LIST NOTE: • Due to standardization, replacements in the • Items marked “*” are not stocked since they When indicating parts by reference are seldom required for routine service. parts list may be different from the parts speci- number, please include the board.
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RX BASE Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark <TRIMMER> 1-162-924-11 CERAMIC CHIP 56PF 1-162-996-11 CERAMIC CHIP 0.5PF 1-141-327-11 CAP, CHIP TYPE TRIMMER 10PF 1-107-686-11 TANTALUM CHIP 4.7uF 1-141-327-11 CAP, CHIP TYPE TRIMMER 10PF 1-162-910-11 CERAMIC CHIP 0.25PF 50V 1-141-327-11 CAP, CHIP TYPE TRIMMER 10PF 1-162-910-11 CERAMIC CHIP...
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RX BASE TX BASE Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1-216-812-11 METAL CHIP 1/16W 1-164-346-11 CERAMIC CHIP 1-216-821-11 METAL CHIP 1/16W 1-162-970-11 CERAMIC CHIP 0.01uF 1-216-835-11 METAL CHIP 1/16W 1-216-837-11 METAL CHIP 1/16W 1-107-520-11 TANTALUM CHIP 33uF 2.5V 1-162-970-11 CERAMIC CHIP 0.01uF...
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TX BASE Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark < JACK > R103 1-216-839-11 METAL CHIP 1/16W 1-764-624-11 JACK (MIC) R104 1-216-825-11 METAL CHIP 2.2K 1/16W R105 1-218-285-11 RES, CHIP 1/16W < RESISTOR > R106 1-216-849-11 METAL CHIP 220K 1/16W...
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WCS-999 Sony Corporation 99I0519-1 9-927-161-11 Personal Audio Company Printed in Japan C 1999. 9 – 30 – Published by General Engineering Dept.