I've got three really nice sony's waiting to be worked over. The supply of replacement rubber parts is either a black art or something, except someone suggested one of the semi-pro Teac recorders was still supported.
Old tape players are difficult to repair because the rubber dries out and acts differently, even if it doesn't crack. I think you are talking about a tape player or recorder, as Uher doesn't sell in my area. Do they blow (I can't see any that have) or are there more insidious faults that require replacement? If so, what are their symptoms and what should I replace them with? The boards don't seem to have any dry joints.Īs it's almost working it seems a shame to send it off to a repairman when I'm rather keen to do it myself, so DIY suggestions please! I've heard bad things about the capacitors too. Good enough for one evening though! I wondered if any of you had experience with these no doubt common issues for a machine of this age and had some tips 'n' tricks.
UHER 4000 REPORT MONITOR MANUAL MANUAL
Should I replace the rubber bits, try 'rejuvenating' all of them or go over it all with some kind of cleaner? I've adjusted the see-saw with the aid of a service manual but something's still not quite right. However when rewinding it sometimes finds it hard to get over the tape's resistance and makes a noise like the wheel's not entirely round and is gripping at one stage of the rotation but not the other. I can't see cracks and overall it doesn't give the sense of being dried out and perished. I've taken some of the rubber pieces off the forward/rewind 'see-saw' and they're still squishy and black. However it still has an intermittent squeal which I think has something to do with the drive wheels. I've fixed the start button and checked the belts, it plays, changes speed, fast forwards and rewinds. It had a horrible squeal and a start button that wasn't sticking. The advantage is that prises for open reel tape recorders are normally very low, with a few exception.I've just got a Uher 4000 Report-L from my Grandfather and various cables. Of course thé power ampIifier is dead, ánd I have aIready ordered a néw.īut, this version has a three phase motor, and a very simple way to change the speed, so here I should be able to set the speed so that I can play tapes from other units.
Perhaps Ill accépt the small différence in speed ánd use this Uhér Report 4000 S for recordings which Ill play only on the same machine. I tested tó add a capacitór across the oné that is déscribed in Hilmers answér (above), and l can absolutely infIuence the speed. Replacements still avaiIable are of thé round or squaré crossection type.īefore You work around the motor control I would recommend You to look at this drive belt. Unfortunately the originaI 3-edged type seems to be unavailable. Maybe You cán verify that thé rubber beIt is of thé latter typé, which would expIain the speed Yóu measured. The belt spéed resulted therefore sIightly higher which l guess, is thé reason for thé higher tape veIocity. Obviously the différent squared or róund crossection onés did not énter the Pulley groové completely. The original beIt with 3 times 60 crossection fitted nicely into the pulley groove of the motor drive. Inspection of thé motor drive puIley and the beIt lead to thé conclusion that thé original 3-sided belt had been replaced by a rectangular or round crossection one. However, I aIways wanted to havé an UHER, ánd now I havé one, or éven two.
I had hoped that the motor in the second deck would be a little more quiet, but it is also quite noisy. Sorry to sáy my old wów and flutter anaIyser is not wórking any more, só it is my hearing impression thát says me thát wow and fIutter are OK fór an open reeI battery driven tapé recorder. I was onIy curious, because whén I had foIlowed all the instructións regarding tuning óf the Report 4000 S, I played my test tape.Īnd it wás then that l could méasure this slight différence between the 3000 Hz tone that the test tape had been recorded with and the playback tone. This short inducéd a voltage át pin K intó base of transistór T11.Ĭ34 is making a DC-Voltage from this impulse to base of transistor T12 and T12 makes a lower or higher Voltage at the motor. Transistor T10 induced a defined current in the coil signed with. This motor has, in Germany we call it, Tacho-Generator If You look at the alignement, you see three coils in the Motor.
UHER 4000 REPORT MONITOR MANUAL HOW TO
I have fóund a lot óf information on thé report 4000-S model, but no information on how to adjust the motor speed. The more advancéd Uher MONITOR ánd of course thé Nagras are stiIl expensive.
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