Uher 4000 Report Monitor Manual
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(Our use of cookies has not changed, however we are now legally obliged to inform you of their use and gain your consent). Vintage Tape (Audio), Cassette, Wire and Magnetic Disc Recorders and Players Open-reel tape recorders, cassette recorders, 8-track players etc. Hello Everyone. My first time posting, but I've been into reel to reel for a while. My latest acquisition is a nice ex-BBC Uher 4000 Report Monitor. While it was cheap, it came without power cable, User Manual or any other accessories so I'm hoping that someone might be able to give me a little advice. I've searched previous threads on the Uher and it looks like the link given previously for User Manual downloads is no longer working.
Softie chrysalis expedition. clicking on the download link for the Uher 4000 series gives a page not found error. Does anyone know of any other source for a Manual? Even simple thing like what all the sockets on the front do, is difficult to decipher without this! I assume that the far right one is power?
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Does anyone know where power cables can be found? Also, the speed change switch knob is missing.
I know the BBC were in the habit of removing them to avoid recordings at anything other than 7 1/2ips. Ideally I'd like to get hold of a replacement so I can easily use the other speeds. The switch shaft appears to have been shortened but not by much so hopefully its still serviceable.
It also looks like the pause mechanism has got stuck in transit, but I hope to be able to free this up today with some careful poking. Other than this it seems to be in nice condition, powers up, ffwds, rwds, was said to be working by the person I got it from, and seems worth some investment to get it back to it's original glory. I was surprised at how small it was, compared with my Nagra IV-S TC. It looks like a really fun little machine Many thanks for any thoughts or comments!
These are gorgeous little machines! I have one (and one of its older sister, the 4000 Report L). Both mine have fully-operational speed changers. The mechanism is the same, however, on the later machine the 'gear lever' arrangement has been replaced with a pair of cams and a single rotary knob.
The '19.0 only' modification should be reversible; but note that it takes a lot of torque to move those cams, which is why the original knob had wings. You will need a regulated power supply of 6 volts, applied to the accessory socket (6 pin DIN, marked with a triangle): pin 3 is positive, 6 is negative. I found a PSU from Maplin, part number L06BR, that did the job. (Interestingly, the power input on my 4000L appears to have been rewired; I was lucky not to cook it.) If you have a lot of old tapes recorded at 9.5 (the most common speed) then you can play them into a computer at 19.0 and slow them down in software (Audacity).
Remember, though, that you will lose top end doing it that way: you are taking only 44100 samples from each 19cm. Of tape, but that is 2 seconds' worth, so the effective sampling rate is only 22050Hz. That's before you take into account the effect of the width of the gap in the playback head on the bandwidth. EDIT: On the 4000L, the pause key simply lifts up to release. On the 4000 Monitor, it's a push-push action.
Thank you for that! I had a look at the machine today and it looks like the Pause button may be OK. It doesn't seem to do any 'heavy lifting' as I thought it might, it just engages and disengages a microswitch and lifts the pinch-roller slightly. It seems to operate as you describe the 4000L - lift to release, which doesn't seem intuitive but works I guess. On investigation it seems like my problem may be more profound.
When I turn the spools manually I get sound out, and it sounds fine when I turn at something approximating 7 1/12 ips. Pause 'on' makes this easy. But when I press 'start' nothing happens, at least when spools are loaded. Run it without spools and the right platter spins happily.
There does seem to be a problem with the belt in the left side of the machine (I'm attaching a couple of pictures). This seems to jump off the motor when going from ffwd to stop. The belts themselves all look in good order.
I wondered if somehow the root of my problems is that something that should have slid back in place, which would tension that belt, hasn't done so. So far I've not tried forcing anything as it strikes me that would cause more harm than good! Does anyone know what this section of the mechanics does, and what might be up.? It could be a simple fix, or it could be one for a professional. Thank you very much for the tip about the power supply.
I'd be happy to rig something up with bits from Maplin! As for the speed switch it turns OK with pliers so mechanically seems to be working. I guess it may need a new shaft to get that torque going easily which is a bit of a fiddly job. I've attached another picture if anyone's interested! Thank you for that!
I had a look at the machine today and it looks like the Pause button may be OK. It doesn't seem to do any 'heavy lifting' as I thought it might, it just engages and disengages a microswitch and lifts the pinch-roller slightly. It seems to operate as you describe the 4000L - lift to release, which doesn't seem intuitive but works I guess. Your picture is a little different to mine: my machine has the speed-changer marked only in cm/s, so perhaps mine is a slighly later example than yours (still pre-1990, though, as it says 'Made in West Germany' underneath) with a different action on the pause key. On investigation it seems like my problem may be more profound.
When I turn the spools manually I get sound out, and it sounds fine when I turn at something approximating 7 1/12 ips. Pause 'on' makes this easy. But when I press 'start' nothing happens, at least when spools are loaded. Run it without spools and the right platter spins happily. What happens if you leave off the take-up spool?
(Let the tape drop over the edge into a plastic bucket or similar; it shouldn't tangle if the container is not disturbed.) There is a roller guide just below the supply spool which operates a brake acting on the spool carrier. When the tape is pulled taut, the roller moves inwards and the brake is released, allowing tape to be paid out. If the tape then becomes slack, the brake is applied again. This maintains a constant tension, holding the tape in contact with the erase and record heads. The play head, however, is in a straight line with the record head and capstan and so needs a pressure pad to hold the tape against it. If the machine is mis-threaded, then the supply spool brake will be applied full-on continuously.
There does seem to be a problem with the belt in the left side of the machine (I'm attaching a couple of pictures). This seems to jump off the motor when going from ffwd to stop. The belts themselves all look in good order. I wondered if somehow the root of my problems is that something that should have slid back in place, which would tension that belt, hasn't done so. So far I've not tried forcing anything as it strikes me that would cause more harm than good! Does anyone know what this section of the mechanics does, and what might be up.?
It could be a simple fix, or it could be one for a professional. The long belt drives a stepped cone which bears on the capstan flywheel. The short belt drives a rocking bar which bears against the supply spool carrier in rewind, hard against the takeup spool carrier in fast-forward or gently against the takeup spool clutch in play. (There is a third belt which drives the tape counter, but that almost never fails and anyway isn't vital.) Your pictures show the long belt having jumped off the motor pulley, which could indicate that it has stretched. Don't worry if it has; compatible replacements are still available. Clean all the friction drive surfaces with meths or isopropanol. Thank you very much for the tip about the power supply.
I'd be happy to rig something up with bits from Maplin! As for the speed switch it turns OK with pliers so mechanically seems to be working. I guess it may need a new shaft to get that torque going easily which is a bit of a fiddly job. I've attached another picture if anyone's interested! Note that the BBC's modification did not just disable the speed selector. On a normal, unmodified 4000-series machine, the motor runs continuously whenever the speed selector is 'in gear'.
But the BBC mod also prevents setting it to 'neutral'; so they rearranged the connections on the leaf switches, so that the motor runs - and the amplifier is powered - only when play / ff / rewind is selected. This means that you cannot go straight from stop to record, but must go via pause; otherwise, the first second or so of your recording will be spoilt. I haven't got a schematic for the machine, but it's fairly easy to see how the switches operate and make sure with an AVO. Oh, and if you want to connect a microphone to the machine, it should be wired with screen to pin 2 and signal to pin 3 (not 1 as you might expect). On the 'radio/phono' socket, pin 1 is a low-impedance, low-level input and pin 3 is high-impedance, high-level. On the 'monitor' socket, pins 3 and 5 are both output (pin 2 is screen, of course). Quote: What happens if you leave off the take-up spool?
(Let the tape drop over the edge into a plastic bucket or similar; it shouldn't tangle if the container is not disturbed.) If I leave off the take up and thread tape from the supply spool, nothing happens. Well something seems to engage but no tape movement from left to right. My Pioneer and Nagra machines would pull the tape past the head (the capstan pressing against the freewheeling rubber wheel) so I'm guessing it's the captan that's not working. Does this sound like it would be the cause of my woes? Quote: The long belt drives a stepped cone which bears on the capstan flywheel.
The short belt drives a rocking bar which bears against the supply spool carrier in rewind, hard against the takeup spool carrier in fast-forward or gently against the takeup spool clutch in play. (There is a third belt which drives the tape counter, but that almost never fails and anyway isn't vital.) Your pictures show the long belt having jumped off the motor pulley, which could indicate that it has stretched. Don't worry if it has; compatible replacements are still available. The long belt has definitely lost it's get up and go.
How To Change Belts On Uher 4000 Report Monitor
It looks OK, but has lost it's elasticity, and does appear to have stretched. I was told that the machine was working before I bought it though. Looks like I need to replace that one. The short belt and the counter belt seem fine. Quote: Note that the BBC's modification did not just disable the speed selector. The BBC mod also prevents setting it to 'neutral'; so they rearranged the connections on the leaf switches, so that the motor runs - and the amplifier is powered.
I haven't got a schematic for the machine, but it's fairly easy to see how the switches operate and make sure with an AVO. That is exactly how mine is working. TBH it doesn't bother me much, though it's possibly a job for further down the line. Your comments help narrow down where to look when I get to that. Quote: Oh, and if you want to connect a microphone to the machine, it should be wired with screen to pin 2 and signal to pin 3 (not 1 as you might expect).
On the 'radio/phono' socket, pin 1 is a low-impedance, low-level input and pin 3 is high-impedance, high-level. On the 'monitor' socket, pins 3 and 5 are both output (pin 2 is screen, of course). Thanks for the tips. I'm more than likely going to rig up a phono in at some point. I did find a schematic somewhere I think but your notes really help see the wood for the trees (I'm a willing amateur, not a hardcore electronics person) Thanks again.
If I leave off the take up and thread tape from the supply spool, nothing happens. Well something seems to engage but no tape movement from left to right. My Pioneer and Nagra machines would pull the tape past the head (the capstan pressing against the freewheeling rubber wheel) so I'm guessing it's the captan that's not working. Does this sound like it would be the cause of my woes? Yes, it could well be the capstan not moving. Try propping the machine up on its back, so you can swing the motherboard out of the way (1 screw to undo) and watch the mechanism to see exactly what is happening. You may need an assistant to operate the keys for you.
Watch to see that the play/record switch lines up correctly with its actuator as you lower the board back into position. The long belt has definitely lost it's get up and go.
It looks OK, but has lost it's elasticity, and does appear to have stretched. I was told that the machine was working before I bought it though. Looks like I need to replace that one. The short belt and the counter belt seem fine. It certainly sounds like it - the long belt is the one that drives the capstan, and if it is not transmitting drive properly (because it has stretched, or jumped out of the pulley groove) then the tape will not move.
Now that you've explained it it seems completely obvious The motor is spinning, but the flywheel, which controls the capstan, is still. The flywheel is driven by the belt which has no tension whatsoever et voila.
Uher 4000 Report Monitor
Sounds like it could be a reasonably simple fix. I've emailed a chap who stocks Uher 4000 RM belts to see about getting a replacement so we'll see how that goes. I'm told elsewhere that he may be able to sort out the speed switch knob too, so fingers crossed. Thanks for your help - Nick // Beechwoods. A quick update - my spares arrived today. A set of new belts, a speed changer switch, and the knob for the speed changer switch.
I've done the easy bit and swapped out the old belts for the new ones. I'm pleased to say that the machine now works fine in all modes. Very pleased! The switch looks like a reasonably simple job, but I'm going to leave it til I have more time to take my time. I also need a fine nib to my soldering iron; there are about 7 or 8 wires to the switch and I've not got the steadiest soldering hand!
One thing I would find immensely helpful is if someone could confirm the wiring to the switch on their 4000 RM: the wiring for mine is as per the attached picture. I just wonder if the wiring on mine is standard or if the 'BBC wiring' mentioned by ajsderby can be corrected when I install the new switch. Many thanks for your help! Well job's done. And it all works, I'm pleased to say. The 'BBC wiring' which means the machine is always on, rather than switchable, is down to a spring-clip being removed on the first of the three switch elements.
Uher 4000 Report L
My replacement switch had the spring intact, so full functionality is now restored. My only grumble is that the headless screw used to retain the new speed knob was missing or I lost it along the way. So I'm going to have to find one of those. Probably 2mm dia x 8mm (maybe 0.08 inch x 0.3 inch) based on the screw holding the ALC knob.
I don't suppose anyone could confirm? Hopefully Maplin will be able to assist.
UHER 4000 REPORT MONITOR Service Manual This service manual contains complete information included in original factory repair manual We guarantee that our manual contains circuit diagrams. Service manuals usually include printed circuit boards, block diagrams, exploded views, assembly instructions and parts catalog. It's invaluable source of information for everyone looking to repair their unit. If You just want to know how to use Your tv, video, mp3 player etc.
You should look for Owner's Manual. After placing order we'll send You download instructions on Your email address. The manual has 12 pages and is available in French, English, German.