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SERVICE MANUAL Service Manual Additionally required Service Manuals for the Complete Service: Service Manual Safety Sach-Nr./Part No. Sach-Nr./Part No. 72010-019.80 72010-800.00 CUC 400 T20 - 6210/8 T20 - 6210/8 text T51 - 721/5 T51 - 721/5 text T21 - 6210/4 T21 - 6210/4 text T21 - 6210/6 T21 - 6210/6 text T21 - 6210/8 T21 - 6210/8 text (9.21509-0275 / G.CD 3775) (9.21509-0475 / G.CE 2375) (9.21510-0375 / G.CD 4175) P14 - 6210/4 P14 - 6210/4 text P14 - 6210/6 P14 - 6210/6 text P14 - 6210/8 P14 - 6210/8 text T20 - 6210/4 T20 - 6210/4 text T20 - 6210/6 T20 - 6210/6 text (9.21508-0302 / G.CD 3902) (9.21508-0202 / G.CD 3602) (9.21508-2202 / G.CE 0502) (9.21509-0375 / G.CD 4075) (9.21510-0275 / G.CD 3875) TP 711 (29642-062.01) Subject to alteration VK 221 / 0797 Service Manual Part No. 72010-019.80A General Section CUC 400 Table of Contents Page General Section ... 1-2...1-7 Safety Advice ... Circuit Diagram Symbols ... Technical Data ... Operating Instructions ... 1-2 1-2 1-3 1-4 25Hz 25Hz interlace signal Volume Tint Brightness Contrast Colour contrast Alignments ... 2-1 Layout of the PCBs and Circuit Diagrams ... 3-1...3-7 Oscillograms Chassis Board ... General Circuit Diagram ... Chassis Board PCB ... CTR Panel PCB ... 3-1 3-2 3-5 3-7 AGC AUDIO Automatic gain control Audio signal Audio signal input Audio signal output Blue signal Baseband Coincidence CCVS signal Green signal Horizontal synchronizing pulse Intermediate frequency Red signal Beam current limiting I2C-Bus Clock I2C-Bus data Sound intermediate frequency Vertical synchronizing pulse Video signal Video signal input Video signal output Switching voltage AV Switching voltage data mode AUDIO IN AUDIO OUT Spare Parts List ... 4-1...4-5 B General Section BB COIN FBAS G HOR. SYNC1 The regulations and safety instructions shall be valid as provided by the "Safety" Service Manual, part number 72010-800.00, as well as the respective national deviations. IF R SB SCL Safety Advice The X-radiation developing in the sets conforms to the X-radiation Regulations (January 8, 1987), issued by the Physikalisch-Technische Bundesanstalt (federal physiotechnical institution). The high tension for the picture tube and thus the developing Xradiation depends on the precise adjustment of the +A power supply. After every repair of t