This first the first view of the job ahead. It is a "Before" view.The 'after' view you have already seen in the 1st post. Unlike other Pioneer models, most of the boards are pretty accessible, except for the tonearm control and motor drive boards. We will need to do a bit of extra disassembly to get at them...
Before you ask...Yes, my bench system consists of a TX-9500-II tuner, a SPEC-1 preamp, and a Spec-4 power amp. Imagine what my main rig is like
Rich P
My PL-630 had intermittent speed issues too - the problem was dirty 33/45 selection and auto/manual speed control switches. Try working the switches 20 or 30 times and then playing to see if the problem goes away and confirm they are the problem. Then you'll need to open up the table to get to the switches and clean them up with DeoxIT.
I have been reading Pustelniakr's excellent description of how to restore a Pioneer PL630. I am the second owner of mine, and have had this turntable since it was almost new. It all works except for motor runaway on the turntable. I am totally inexperienced with this sort of work although I am a very competent and life long mechanical engineer (top end motorcyle restoration was my work). I am considering carrying out some of the operations he describes. One of them is boot repair, and I was wondering what is RTV, and where I can get it.
JamesTE.
Switches are easy to check. Use an ohm meter and see if there is an issue. I doubt it is switches, but I suppose it could be. It is more likely motor control circuitry, or a broken wire.Hello, Rich P, and thanks for your comments about motor runaway on a Pioneer PL 630. I had taken some heart from the several postings that suggest switch problems could be the problem. Are you saying that motor runaway could not be from bad switches? I have noticed that sometimes when I have first switched on the deck the motor runs at a slow speed until I start trying the swithces.
I had taken this as an indication of an intermittent problem such as switches. I would have though an IC problem would not be intermittent - but I really have no knowledge to base this statement on! Would it be worth cleaning the switches to see if it solved the problem or is this a waste of time? Any advice appreciated.
Thanks for the guide to the manual. In fact I have already downloaded one and seen the page on motor runaway in troubleshooting.
Regards, James TE.
The lifter height is adjustable at the lifter arm, via setscrew.Hi, I have a pl630, i read your restorations. they were great. really appreciate the effort.
I have some problems with my pl630 currently. Everything works fine except for 2 things.
1. When the quartz is on, the motor starts spinning tremendously fast!!, and it's back to normal once i off the quartz. any idea what may cause this?
2. The tonearm lifter is not lifting the tonearm high enough, I suppose this has got to do with some adjustments i believe? Or should I take out the whole tonearm assembly and clean the lifter properly as well?
Thanks!