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You should see a long tube shaped coil (will not see the actual wires) about 1/2 inch wide and about 6" long. That is the delay line. Look for small coils attached to both sides of that, and check it as well. With an ohm meter all those should be very low resistance, prob all less than a few ohms. Its under the chassis in about the middle under the chroma module.
You could also check the 3rd video amp transistor if it's socketed. they can be checked with a simple diode test. Let me know if you can find it (mounted on the top of the chassis, not part of a module).
If those things all check out,then I am out of sugestions, other than just going thru and checking resistors coils some of which can not be tested in circuit.
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