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PA3004 Pin 4 question

You've probably seen this from the service manual? It doesn't give component values, which is what you're probably referring to?

View attachment 1270551

Yes, that is correct. I find their pictures and 'explanation' of the bridge operation confusing because they flip the bridge picture over between examples. It is a 'service manual generic' example and explanation with different component designations than the actual circuit in question.
 
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