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File name 134A-1.pdf

Contents Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Servicing Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Electrostatically Sensitive (ES) Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Description of Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Adjustment Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Correction of Screen Tilt & Keystone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Replacing the Lamp. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Description of each Block Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Description of Micom . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Exploded View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 Exploded View Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 Replacement Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 Schematic Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -2- Safety Precautions 1. Before returning an instrument to the customer, always make a safety check High voltage is maintained within specified limits by close-tolerance safety- of the entire instrument, including, but not limited to, the following items: related components/adjustments in the high-voltage circuit. a. Be sure that no built-in protective devices are defective and/or have been If high voltage exceeds specified limits, check each component specified on defeated during servicing. (1) Protective shields are provided on this chas- the chassis schematic and take corrective action. sis to protect both the technician and the customer. Correctly replace all missing protective shields, including any removed for servicing conve- 2. Read and comply with all caution and safety-related notes on or inside the nience. (2) When reinstalling the chassis and/or other assemblies in the receiver cabinet, on the receiver chassis, or on the picture tube. cabinet, be sure to put back in place all protective devices, including, but not limi