Sansui AU alpha 707MR - Hot?

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Hi. The new trimpots arrived and I'll start the replacement.

I'm afraid to damage the patterns, so I wanna ask you some help, please. For the job, I even bought a soldering station, YIHUA 937BD+.

1) Which temperature should I choose to work safely and not damage the PCB tracks?

2) Which kind of desoldering wire is recommended for this kind of job? Regular, unfluxed or no clean?

3) Any other tips?

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