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Ballast pin-out differences
There is a dfference in pin-outs for different models of this set. The TS-B,C,D,E,F,G,H and (Early model) J have a connection to all eight pins. The TS4 J (Late model) only uses pins 1-2-3-4-6 and 7. Reference Wallaces Telaides Motorola Schematic Diagrams Chassis TS 4B thru TS 501A. Are you using an incorrect ballast for this chassis?
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