Seeburg lpc-480 service manual free pdf download

Certain parts of this may, or may not, apply to your model phonograph--see the model specific guides. Typical lubrication points PDF for the Seeburg mechanism KD - lift lid, lift keyboard forward, lift keyboard again to get past stop so it lays down completely forward, then lift one of the three wires the same as for the above no plastic tubing on these wires : If your Seeburg is repeating same selection without advancing to the next record, skipping past selections or reacting too slowly to go into play then chances are your pivot in the clutch tower has seized up and needs to be taken apart.

Seeburg Lpc Service Manual Pdf Here you can see the replacement capacitors and the recommended upgrade replacing the driver transistor resistors with R 1W Flameproof ones. Here we have the rear of the same PCB showing where the added jumpers are soldered after cleaning off the solder resist from four traces near the card edge connector Here you can see the added jumpers - these are essential mods to reduce the risk of amp burnout And here you can see rest of the replaced capacitors - note the double caps are to replace non-polarized high value caps.

Capacitors divide in series and add value in parallel. When done correctlyALL selections should be set and the machine should play every song. If the machine does not select and play at least two songs then let it scan and stop, do the battery test again, but do not start the mechanism. Schematic PDF showing normal voltages for a typical tube Tormat system.

Jukebox trouble shooting Two problems common to virtually all Seeburg vertical play record mechanisms are independent of the selection system used in the jukebox. There is another problem common to all mechanisms using the Tormat Memory Unit. I'll give pointers to fixes for all three below. Please note that while I have checked and rechecked to insure that the below information is correct, I take no responsibility for any difficulties incurred as a result of performing any operations listed.

Seeburg Lpc Service Manual Download Symptoms When a selection is made, the mechanism scans, picks up a record, plays it, starts to put it back into the magazine, plays it again, etc.

When a selection is made, the mechanism scans, picks up the record, immediately rejects it, moves on to the next selection, picks it up, immediately rejects it, etc. When a selection is made, the mechanism scans twice, picks up nothing, and stops. The third may not be caused by the specific selection system used in the jukebox. After all, the selection system is only responsible for selection Write-In, one third of the entire process. The Safety Plunger is mounted at the rear of the carriage, on the side facing the record magazine.

When the record is in the process of being transferred back into the magazine, the Safety Plunger is released to move into the area formerly occupied by the record.

A warped record will prevent this from happening, so the clutch cannot shift back into scan, resulting in the record being transferred into play again. This will repeat until the obstruction is removed or the power is turned off. Years of inattention, no cleaning and no lubrication will result in what lubrication is left turning into a sticky mass which prevents free movement of the Safety Plunger, duplicating the action of a warped record. The mechanism Operation and Adjustments manual for your jukebox does a very good job of detailing which adjustments affect others, and which adjustments must be correct before making another.

Before attempting to clean up your mechanism, get a copy of this manual. It's available from: Always Jukin' or Victory Glass Before cleaning the mechanism, remove the motor, trip solenoid, cartridge, trip switch, and memory unit.

Use a water-based degreaser followed by plenty of fresh water, and make sure it dries completely before doing anything else. The mechanism trip solenoid is used to trip from scan into play and from play into scan. Thus there are two circuit paths to energize the solenoid, one for Select Trip and the other for reject or Mute Trip. There are wiring differences between mechanisms used in the various jukeboxes, so I'll refer you again to the manual for yours.

Generally, mechanism switch 3M12 is closed in play to complete the record reject path from the amplifier's Mute Trip Relay.

Another switch, 3M11, is closed in Scan and Transfer to energize the Mute Trip Relay, which mutes the amplifier so that all the clicks and pops of record transfer are not heard. If either switch is misadjusted so that both are closed at the beginning of record play, the record will reject as soon as the tonearm sets down.

Switch S is the switch mounted to one side of the tonearm Cradle Frame. It closes when the tone arm reaches the lead-out groove of the record, to begin the transfer cycle to put the record back into the magazine.

To check for this, turn the power off and manually put the mechanism in play with a record on the turntable. Turn the motor coupling until the tonearm just sets down, and rotate the coupling a few turns more to insure that the mechanism is completely in play.

Use your ohmmeter set for continuity to check between the non-grounded end of S and ground. If there is continuity, either a switch is misadjusted, or a switch or the wiring is shorted. If the short goes away, the problem is in the amplifier, volume control, or PRVC a likely candidate.

Otherwise the problem is in the mechanism. We must eliminate two of the three possibilities, to determine which circuit has the problem. First, check the Write-In voltage usually labeled 'Write-In Source' on the control center or selection receiver test terminal strip.

For the tube-type machines, this voltage will be VDC. The Techie Stuff section of this website talks about how the Tormat works, so you should check it out before proceeding. If this does not occur, the problem is in the Read-Out or Trip Circuits.

If operation is normal, the problem is in the Write-In circuits, to be covered later. Read-Out or Trip? If the problem is in Read-Out or Trip, we must continue to eliminate one or the other. First, verify that the Read-Out timing is correct. Turn the machine off and disconnect the mechanism plug from the control center or selection receiver. Move the carriage to one end of the magazine, remove the records at that end and also remove the mechanism carriage cover.

Set your ohmmeter for continuity and connect it between L and ground. This is the inductor that is mounted to the Detent Timing switch next to the motor. Either side of the inductor will do and any decent ground should do. Slowly rotate either the turntable or the motor coupling a small amount and note which way the carriage moves.

Now check the Contact Block Actuator slide or reversing switch depending on jukebox model to make sure that it is in the correct position for the direction of carriage travel you have chosen. For those models, make sure you are moving the carriage in the Read-Out direction. Slowly move the carriage until you get continuity, then stop. Now if you sight down between the metal record separators, you should see the Transfer Arm Head perfectly lined up with centered on the magazine record separator.

If so, the timing is correct for this direction of travel. If not, fix it. There are several inter-dependent mechanism adjustments which affect this timing. Any one not correct will make this timing incorrect. Perform this check at each end of the magazine and in each direction for those machines doing Read-Out in both directions. The other probe should be connected to ground. Plug the mechanism cable back in, apply power, and start the scan. You should see your meter dipping from the high voltage while the carriage is in the magazine area, and a steady high voltage which should be approximately equal to the Write-In voltage at the magazine ends while reversing direction.

The dip occurs each time a toroid is read out. While in the magazine area, you should get a voltage reading of between one-third and one-half the voltage read at the magazine ends, with the voltages equal while moving in both directions. Note that a digital voltmeter will not help here. If the voltage reading is constant, there is a broken connection between this test terminal, the mechanism Detent Timing switch, the contact block, the Tormat rivet connections, and ground.

If you measure zero or significantly less than the Write-In voltage, the problem is in the control center or selection receiver power supply or wiring. If the voltage reading is off in one direction but not the other, the problem is usually caused by a bent or pitted contact block contact, or a misaligned Tormat. If the voltage reading is low or high in both directions, re-adjusting the Detent Timing Switch should solve it, but keep in mind that dirt or pitting on these contacts could result in a valid voltage reading but not enough current to Read-Out the toroids.

If you are using a neon indicator connected in place of the shorting link between the 'Read Out Source' and Read Out Load' terminals of your control center, you can get a correct indication neon lamp flickering but no Read-out due to dirty or pitted contacts. If your box has the symptom that selects properly in one direction but not the other, and these readings are correct for the good direction and not the other, suspect a broken or mis-adjusted contact block contact for that direction.

It is also possible that the contact block is not making contact on one side of the Tormat due to worn carriage rollers.

If your readings are correct and there is still no trip, the problem is in the Trip circuit. Thanks and a tip of the hat to Ron Rich for contributing to this section. Trip Circuit Problems If you've gotten to this point, the problem is in the trip circuit. The next thing to do is to eliminate either the Select Trip Relay or the trip circuit, which may use either a thyratron or SCS as the active device.

Unplugging the RCA plug and plugging it back in while the mechanism is in scan will usually cause a trip to occur due to the noise induced as you disconnect and reconnect the RCA plug. You should be able to force a trip by connecting the positive end of a C or D cell to the gate of the Trip SCS, with the negative end of the battery grounded.

If this is the case, the Trip circuit is probably okay check the input components to make sure and the problem is most likely an open sense loop or intermittent RCA plug connection see below.

The control center or selection receiver should have a set of three adjacent screw terminals, marked 'Read-Out Source', 'Read-Out Load', and 'Trip Relay'. Note that several of the selection control centers do not have the 'Trip Relay' test point.

The first two should be connected by a shorting link. Turn off the power and loosen the screws securing the link. Rotate the link so that it now connects the 'Read-Out Load' and 'Trip Relay' terminals, and tighten both screws. Thanks for the link. I was able to get an items that are not in my manuals - the wiring diagram for the remote. Dr Galaga said:.

No NSM manuals Good luck since NSM support is poor for their equipment. Thanks for the heads up Ken.. I picked up 2 and got one working, but I lack the technical manual on the other to tell me why one of the lights on the main board is dark. As I see it, the guy is not achieving any pecuniary advantage by offering the facility of a "freebee" pdf download. I'd guess they've been available for a while on that site and if something was going to happen it would have happened already.

Worst case I guess, would be that the guy would be asked to stop, "Litigation" seems a pretty expensive and rather drastic step in the circumstances. ReSeT said:.

Oh Dear! The posting of the facility on another jukebox forum only prompted a response of "Thanks. I just got a nasty email from a guy selling copyrighted Rowe jukebox manuals on a cd rom. He stated in no uncertain terms you can't copyright a service manual. Evidently, Rowe International says you can because they Rowe have been copyrighting their service manuals for quite a while.

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