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Pioneer SX-727 brackets

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Gregg Tilles

New Member
So I just did a lamp replacement on a SX-727, when I removed the panel I found these two brackets loose inside the chassis, I didn't hear them drop but for the life of me I can't figure out where they were. AI gave me some ideas but I was hoping someone could show me with a picture where they go. Thanks!

sx727.JPG
 
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Gregg Tilles said:
So I just did a lamp replacement on a SX-727, when I removed the panel I found these two brackets loose inside the chassis, I didn't hear them drop but for the life of me I can't figure out where they were. AI gave me some ideas but I was hoping someone could show me with a picture where they go. Thanks!

View attachment 3849524
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Those are transistor heatsinks.

Left pic shows them in place with the brittle plastic screws. Right side shows them replaced.

IMG_20260112_141935240.jpg
 
Bottom side, see towards the middle.
Your pic shows the mica insulators so be sure to use them or else the heatsinks will be charged and if they touch something
nearby they will short causing you more problems.

Using metal screws is fine, but you'll need a shoulder washer on each one to isolate the screw from the transistor.

Screenshot (1439).png


IMG_20220712_085021456.jpg
 
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Thanks,
That makes total sense, I had recognized the mica insulators but since I hadn't removed any heatsinks I thought it was some weird Pioneer spacer or something that fell out after I removed the faceplate, even AI was telling me some crazy stuff about what it thought it was...and with confidence! Thanks again, I'm off to put them back on!
 
Gregg Tilles said:
Thanks,
That makes total sense, I had recognized the mica insulators but since I hadn't removed any heatsinks I thought it was some weird Pioneer spacer or something that fell out after I removed the faceplate, even AI was telling me some crazy stuff about what it thought it was...and with confidence! Thanks again, I'm off to put them back on!
Click to expand...
I avoid AI because it is wrong way too often. Best to ask here. There are many people willing to help.

Good luck with your project.
 
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The second I saw those I recognized them, I have had the exact same issue with the SX-727 and 828. Glad we got it sorted out.
 
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