User's Manual

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THE SERVICE MANUAL

SK-1123-SPQ

TABLE OF CONTENTS

CIRCUIT

BLOCK DIAGRAM

THE DESCRIPTION

THE PCB LAYOUTS – Top & Bottom Sides

THE SILK SCREENS – Top & Bottom Sides

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Summary of content (3 pages)

PAGE 1
THE SERVICE MANUAL SK-1123-SPQ TABLE OF CONTENTS CIRCUIT ····················································································································································· 3 BLOCK DIAGRAM ····································································································································· 4 THE DESCRIPTION ······························································································································ 5-6 THE P
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THE DESCRIPTION POWER SUPPLY SWITCHING POWER SUPPLY The XL1509 is a 150 KHz fixed frequency PWM buck (step-down) DC/DC converter, capable of driving a 2A load with high efficiency, low ripple and excellent line and load regulation. Referring to schematic diagram figure 1, input voltage range from DC12V to DC24V step down to DC9V , then output to RELAY unit and 78M05 regulator. 5V VOLTAGE REGULATOR 78M05 provide a stable voltage (DC5V) to MCU unit. BACK-LIT JUMPER Terminals No.
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FCC STATEMENT 1. This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) This device must accept any interference received, including interference that may cause undesired operation. 2. Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.