650 manual pioneer sx

After finding missing parts around the world and a full recap and cleaning, I've a brilliant sounding hi-fi receiver except FM. At first FM didn't work.

Some fine adjustment later, FM started work as good as a new unit. I like this wooden case receivers of 70's. They are very well made and vintage look is so beatiful. There is no visible plastic parts on unit. You can just see metal and wood. If you can replace or recondition some parts on pcb's like electolytic caps , veneer on wooden case and some rust on metals, this unit nearly sound forever. Reviewed Jul 12th, by anderscastle.

If you see one. Buy it! Had the bigger ones , and they Sound good, but this sounds just a little bit better. The bigger ones in order for them to Sound good you have to have the volume up a bit and with massive amount of power it get some what tiresome after a while. The rated at 35 rms is not that 'powerfull' but dont get me wrong it carries plenty of punch but the sound is so balanced and you can still make it sound good and still have a conversation without yelling.

But the showstopper in this which i find far superiour than the other receivers is the fm tuner, which is really really good. So if you find one buy it! Reviewed Jun 16th, by tutor turtle. My girlfriend now wife bought this Pioneer SX new in Positioned in the lower-middle of Pioneers late 70's lineup, it was a very good value for the money.

Clear, clean with plenty of power, it seems underrated at 35 watts, sounding closer to Smart cut aluminum faceplate and machined knobs makes an impressive statement. Only available in vinyl clad MDF, it can easily be veneered in real wood, which I did in walnut after recapping it this year Now it looks as good as it sounds. Reviewed Jan 04th, by rsps. I recently acquired my SX from a third party. After all these years, it still is in amazing condition and the sound of a true HiFi Receiver is just completely different from modern digital equipment.

I would highly recommend this unit. Very well built and the warmth of sound is excellent. Reviewed Sep 13th, by leemitchener. Wow, it was freakin' great. Two tape loops, rare in receivers under 50wpc, one way dubbing but that was OK.

My SX was just right for my Bay Ridge studio apartment. Near lease breaking levels were possible with enough output to impress, if not annoy the neighbors.

Man, that 35wpc sounded great. Had a very crisp tuner as I recall, made a lotta great tapes off the radio WNEW-FM , had a nice sleek look, though the high filter could've had a better slope. All controls sounded and felt positive.

Alas, I eventually sold it. The SX, and were Pioneers bread and butter in those days. Not cheap on ebay either. If anyone out there could help me I'm trying to find out what's wrong with my sx pioneer. The amp works great on every channel except for phono! No sound!

It's not the record player I hooked it up to a different amp and it works fine. I have no idea what to do but would love some advice. I know this thread is very old but did you ever get it fixed? There were two drawbacks to the SX that I'm aware of:. The "wooden" case tends to peel 2. The back panel where all the connectors tend to rust if kept in a humid area. If yes: bad cable or phono cartridge. Then try contact cleaner Deoxit is best.

Unplug everything, remove covers, do this in a place where the dirty cleaner can drain away without staining tables or carpets. Rotate controls while spraying. Follow up with compressed air, no more that 60 psi or so, canned air is the safest bet.

Rotate controls while blowing dry. If it still doesn't work you need a technician, it is a very simple circuit, 4 or 6 transistors, a dozen caps and resistors, not complicated at all.

Both the left and right channels sound OK however the audio level is higher on the left channel versus the right with the balance control at mid-range. On occasion I have heard noise on the right channel. I have to set the balance control at about the 3 o-clock position to compensate. Also, the tuning dial does not accurately indicate the the actual station frequency for example AM is at and If someone could point me in the right direction I would be grateful in my effort to restore it to peak performance.

Dirty contacts are the most common cause of noise and attenuation. Use "Deoxit" contact cleaner in safe place away from delicate surfaces do this on a work bench blow dry with compressed air. Limit the air flow to 60 psi or canned air to avoid damaging other components. The second most common failure in this series is the speaker protection relay having corroded contacts. You could take the relay apart and burnish the contacts, or buy a new one.

The pin-out is a common one, the coil is rated at 12volts, again very common. Pioneer used the same relay in many of their models of the same year. Check the part number to cross-reference, or call Pioneer themselves, they had stock last time I needed one. Tuning accuracy is as simple as moving the set point on the needle where it is glued on the string Do this only if the FM and AM are off by a similar amount and in the same direction.

If one band is "on station" and the other band is "off station" it is capacitor drift. Recapping may help, it may need to be re-alined after. This job is best left to a technician with the proper equipment. I hope this helps. Relay is 24V, not Clean the contacts which are gold plated by using a piece of ordinary printer paper soaked in isopropyl; trap the strip between the contacts by holding the relay closed with your finger, then slide the paper out.

Repeat a few times until the contacts look clean. King Leonardo sends greetings. Remember; be what you is, not what you is not.

New Caps throughout the entire receiver electrolytics and the tuning string has probably migrated. You can remove the cover and carefully move the pointer to the indicated position. I currently have a Pioneer SX that needs to have the tuning string replaced. I weakened it when I was soldering and it broke. Shouldn't be too hard to replace with some 40 pound Braided Nylon Fishing line.

It's experiencing hum when turned on, the left speaker channel shorts out and the light bulb, of course, is burned out; incredibly it still sounds great! I'm grateful to have found this manual though before I take her to the shop I'll know a little bit more about this dependable receiver that I hope to own for a few more decades.

It's so good to have copies of this information again. My wife and I bought an SX in and it's still going strong, currently powering a 4 speaker system in our garage it's nice to have music or a ball game when working outside or relaxing in the driveway.

Since the garage is built into the lower level of the house with a bedroom over it, it makes a great listening enclosure for the entire system. I have owned a SX for many years. I bought it from our loacal recycle centre - YES someone had dumped it! Silly man. However the lights for the Dial had died years ago as they are only little bulbs I have replaced them with super bright Blue LEDs with the 7.

The result is smooth, brilliant blue light, instead of dull light as before! Thankyou for the scematic it helped find the voltage used on the lamp stage. Also would likr copy of owners manuel. I just picked this receiver up without the owners manual. You are assured of faithful. The protection circuit and power relay are designed to instantaneously open the output circuit in the event of a short in the speaker leads or current surges which may occur without warning. This feature prevents, damage to speakers or transistors, and also prevents click noises, from the speakers during operation of the poiner switch.

Two Tape Monitor Switches permit selective recording from one tape to another when two tape decks are con- nected to the receiver at the same time. It is thus possible to record onto a cassette from an open reel tape deck, or vice versa. The large tuning scale provides greater readability and hence more precise tuning of the desired frequency. The front panel has been designed for improved operating con- venience. Used in combination with separately purchased speakers and, if you desire, other program sources such as turntable or tape deck, you can create a.

An outdoor FM antenna should be used for FM reception. Close dust cover whenever possible. Recording tape should not be lai't unused for long periods of time. Avoid placing in proximity to ma-. Absorbs Right and left speakersI Vibration from speak- position is slightly have an effect on sound sound.

Also effec- should have approximately ers should not be to the rear of an quality. Bass will be accentuated if the rear of the speaker comes into direct contact with the wall.

Bookshelf type speakers should be placed on stands or concrete blocks. To insure trouble free operation, the following conditions should be avoided when choosing a suitable. Pioneer sx owners manual This is the 9 pages manual for pioneer sx owners manual.