Pioneer sx 727 resto? Help!

Pioneer SX King · 17th May 2011, 11:19 PM

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?
Thanks!

singa · 18th May 2011, 02:34 AM

Hi, Clean off the dust on the pcb and check soldering for breaks and bad joints.Resolder if you have to.

sregor · 18th May 2011, 03:45 AM

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 audiokarma.org - they have a separate pioneer forum. Good luck with it.

c2cthomas · 18th May 2011, 04:09 AM

Quote:

Originally Posted by sregor

Find a manual

This should help......... Pioneer SX-727 | Owners Manual, Service Manual, Schematics, Free Download | HiFi Engine

Pioneer SX King · 20th May 2011, 08:01 PM

Thanks very much everyone!

17th May 2011, 11:19 PM	#1
Pioneer SX King diyAudio Member Join Date: May 2011	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? Thanks!

18th May 2011, 03:45 AM	#3
sregor diyAudio Member Join Date: Jan 2006 Location: massachusetts	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 audiokarma.org - they have a separate pioneer forum. Good luck with it. __________________ Steve

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Pioneer SX-1280	Pure_Brew	Solid State	8	22nd November 2010 10:21 PM
Pioneer Sx-1980 Help	jleaman	Solid State	7	10th May 2010 12:04 PM
Pioneer SX 828	vex	Solid State	0	27th April 2010 09:12 PM
Pioneer SX-1980	trace59	Swap Meet	7	9th January 2008 07:06 PM
Pioneer SX-780	aaronlubelski	Solid State	8	25th May 2005 06:24 AM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

18th May 2011, 02:34 AM	#2
singa diyAudio Member Join Date: Apr 2004 Location: near	Hi, Clean off the dust on the pcb and check soldering for breaks and bad joints.Resolder if you have to.

20th May 2011, 08:01 PM	#5
Pioneer SX King diyAudio Member Join Date: May 2011	Thanks very much everyone!

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)