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+,7$&+, SERVICE MANUAL NTSC NA8 CHASSIS PA No. 0139 27UX01B-501 27UX01B-511 R/C: CLU-432UG CAUTION: Before servicing this chassis, it is important that the service technician read the "Safety Precaution" and "Product Safety Notices" in this Service Manual. This television will display television Closed Captioning ( CC or ) in accordance with paragraph 15.119 of the FCC rules. CONTENTS SAFETY PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 PRODUCT SAFETY NOTICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 POWER SOURCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 SERVICE NOTES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 CIRCUITS AND BLOCK DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . 34 PARTS IDENTIFICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT SOLID STATE COLOR TELEVISION JUNE 2000 HHEA-MANUFACTURING DIVISION SAFETY PRECAUTIONS NOTICE: Comply with all cautions and safety-related notes located on or inside the cabinet and on the chasis or picture tube. WARNING: Since the chasis of this receiver is connected to one side of the AC power supply during operation, whenever the receiver is plugged in, service should not be attempted by anyone unfamiliar with the precautions necessary when working on this type of receiver. The following precautions should be observed: 1. Do not install, remove, or handle the picture tube in any manner unless shatterproof goggles are worn. People not so equipped should be kept away from the picture tube while handling. 2. When service is required, an isolation transformer should be inserted between power line and the receiver before any service is performed on a "HOT" chassis receiver. 3. When replacing a chassis in the receiver, all protective devices must be put back in place, such as barriers, nonmetallic knobs, adjustment and compartment covershields, isolation resistors, capacitors, etc. 4. When service is required, observe the original lead dress in the high voltage circuitry area. 5. Always use the manufacturer's replacement components. Critical components as indicated on the circuit diagram should not be replaced by another manufacturer's. Furthermore, where a short circuit has occurred, replace those components that indicate evidence of overheating. 6. Before returning a serviced receiver to the customer, the service technician must thoroughly