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Old 17th May 2011, 11:19 PM   #1
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Default Pioneer sx 727 resto? Help!

Hi I recently bought an sx 727 off ebay. Its a bit of a dog and needs a bit of TLC!
The deffinate problems are as follows
A few bulbs are out ( i can get the bulbs and fit them fine)
The signal meter isnt working at all
The signal strength meter was working the first time i tried it, but then i couldnt get any singal on the amp all thother an hour later!
The left channel has popping and crackling which is getting louder! assuming this could be the caps? it started off non existant during the hour i had it on, then got louder and louder.
all the pots seem dodgy too, just some cleaner would benefit these!
What would anyone recomend I should do as a bare minimum?
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Old 18th May 2011, 02:34 AM   #2
singa is offline singa  Singapore
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Hi, Clean off the dust on the pcb and check soldering for breaks and bad joints.Resolder if you have to.
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Old 18th May 2011, 03:45 AM   #3
sregor is offline sregor  United States
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Find a manual - check voltages on power supply. Change the little white sanyo electrolytics in the tone controls and other places. Clean it. You may want to change some of the electrolytics - especially if they look "bloated" overheated (plastic sheathing shrunk) or leaky. Static is usually caused by bad silicon not bad caps, but can be cracked or broken solder connections or even cracked components. Look for flaky transistors - especially input transistors and first gain transistors in amplifier circuits. Can probably find more info on repairs at - they have a separate pioneer forum. Good luck with it.
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Old 18th May 2011, 04:09 AM   #4
49 - for the 19th time!!!
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Originally Posted by sregor View Post
Find a manual
This should help......... Pioneer SX-727 | Owners Manual, Service Manual, Schematics, Free Download | HiFi Engine
DIY audio can be expensive but getting to see things go up in smoke - that's priceless!!!! ..... "whatever - call it brainfart of Mighty ZM"
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Old 20th May 2011, 08:01 PM   #5
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Thanks very much everyone!
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