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30 A video test pattern is generated by the digital convergence to aid in converging the set. There are customer menu adjustments and service adjustments. The use of Chipper Check will speed up the alignment process in the event of major component failure.
Digital Generator Module (DGM)
The CTC211 uses a Digital Generator Module (DGM) for convergence correction and auto convergence. Inside the DGM are five EEPROMS, Convergence Micro and a Digicon IC. U502 is the convergence micro. The purpose of U502 is calculating convergence correction based on information from the optical sensors. The convergence micro controls the Digicon and the EEPROMs. U501 (Digicon) generates the convergence correction signals that are fed out to the convergence amplifiers. Data stored in the EEPROMs is used for alignment information for the different scan modes. U510, 11, 12, and 13 are mode EEPROMs. U509 is the factory reference EEPROM. Two buffer ICs (U503 and 504) buffer the output from the Digicon IC to the output amplifiers.