Seeburg lpc-480 service manual free pdf download

Seeburg lpc-480 service manual free pdf download

Seeburg Lpc 480 Service Manual,Jukebox trouble shooting

Seeburg LPC Manuals. Manuals and Guides for Seeburg LPC Free Download. Seeburg LPC Note: Many of the manuals for the Seeburg LPC are also applicable to Sony Sound Forge Free Full Version Torrent Seeburg LPC, LPCR () Manual & Brochure. Service Manual, Parts Catalog With Deluxe Troubleshooting Guide. Seeburg SS SEEBURG acoustic line Downloads: Product-Guide Anwenderpreise Flightcases etc The secondary problem were the write trigger contacts in the Pricing Unit. Seeburg Lpc Service Manual' title='Seeburg Lpc Service Manual' />Free Pdf Repair Manuals Adobe Cs6 For Mac Free Download Full Version Colour Printers For Mac Install Sublime Text For Mac Mac Lipstick D For Danger Руководство Excel For Mac Flash Drive For Mac Os X ... read more

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. 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 first two symptoms pertain to any jukebox between the MA and the SMC3. 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. If this switch is shorted, or the cabling between it, the reject switch in the Volume Control Assembly, optional PRVC, or the Mute Trip Relay in the Amplifier is grounded this can occur.

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. Given the symptom, it is probably reasonable to assume that the other supplies are functioning properly, but it doesn't hurt to check them, too. There should be test terminals for these supplies on the same terminal strip. Disconnect the RCA plug sense loop connector from control center or selection receiver. Connect the negative side of a C or D cell battery to the center pin of the plug, while grounding the positive side of the battery to set all toroids to the selected state. Note that if you use this procedure on a tube-type jukebox, you must reverse the battery connections.

Plug the sense loop connector back in and manually scan the mechanism. It should now trip at each record, transfer, and play it. Upon reject, the mechanism will move to the next record, and repeat the cycle. 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. Note that some models most notably, LPC1 and LPC only perform Read-Out while traveling in one direction. 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. They include: Magazine - Horizontal Position, Transfer Arm 1, Tormat Memory Unit Position, Read-Out Contact Block 1, 3, and Detent Switch. 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. Re-apply power and manually place the mechanism into scan. It should now trip at each record, play it, go back into scan, trip at the next record, etc. If this does not occur, the problem is in the Select trip Relay, Trip Solenoid, mechanism switches 2M11, 3M1, or the associated wiring. A very good possibility to check is the sense loop RCA connector, especially the ground contact between this connector and the PC board. If your machine uses the Pulse Amplifier, check the resistors and capacitors inside for changed values due to aging.

Another possibility is a broken wire in the sense loop. For the solid state machines, check the resistors and capacitor in the SCS gate circuit for correct values. For the solid state machines, check for a bad ground connection between the RCA jack and the control center chassis, and also check continuity between this jack and the trip circuitry on the control center PC board. Check for continuity between the RCA plug center pin and shield. This should measure no more than a few ohms. If you do not get continuity, the plug itself is the most likely culprit. The Tormat has no moving parts inside, so theoretically nothing should go wrong. It is possible, however, that some of the wires may have gotten frayed over the years. If so, the most likely place is where the cables exit the Tormat.

To gain access, remove the four screws holding the cover to the ends of the Tormat. The black plastic contact rivet memory block at the end opposite the cable exit is screwed to the metal baseplate using two screws. After you remove these and the screws holding the cover, you can gently remove the memory block, followed by the cover itself. Be careful that you do not snag any wires when removing or replacing the cover. Obviously, the warranty is no longer in effect. Write-In Circuit Problems Here's how to determine if you have a problem in the Write-In circuit. If your machine uses a remote control stepper and it can be bypassed, do so by disconnecting the Tormat cables from the stepper and connecting them together. 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. Given the symptom, it is probably reasonable to assume that the other supplies are functioning properly, but it doesn't hurt to check them, too. There should be test terminals for these supplies on the same terminal strip. Disconnect the RCA plug sense loop connector from control center or selection receiver.

Connect the negative side of a C or D cell battery to the center pin of the plug, while grounding the positive side of the battery to set all toroids to the selected state. Note that if you use this procedure on a tube-type jukebox, you must reverse the battery connections. Plug the sense loop connector back in and manually scan the mechanism. It should now trip at each record, transfer, and play it. Upon reject, the mechanism will move to the next record, and repeat the cycle. 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. Note that some models most notably, LPC1 and LPC only perform Read-Out while traveling in one direction. 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. They include: Magazine - Horizontal Position, Transfer Arm 1, Tormat Memory Unit Position, Read-Out Contact Block 1, 3, and Detent Switch. 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. Re-apply power and manually place the mechanism into scan. It should now trip at each record, play it, go back into scan, trip at the next record, etc. If this does not occur, the problem is in the Select trip Relay, Trip Solenoid, mechanism switches 2M11, 3M1, or the associated wiring.

A very good possibility to check is the sense loop RCA connector, especially the ground contact between this connector and the PC board. If your machine uses the Pulse Amplifier, check the resistors and capacitors inside for changed values due to aging. Another possibility is a broken wire in the sense loop. For the solid state machines, check the resistors and capacitor in the SCS gate circuit for correct values. For the solid state machines, check for a bad ground connection between the RCA jack and the control center chassis, and also check continuity between this jack and the trip circuitry on the control center PC board. Check for continuity between the RCA plug center pin and shield. This should measure no more than a few ohms. If you do not get continuity, the plug itself is the most likely culprit. The Tormat has no moving parts inside, so theoretically nothing should go wrong. It is possible, however, that some of the wires may have gotten frayed over the years.

If so, the most likely place is where the cables exit the Tormat. To gain access, remove the four screws holding the cover to the ends of the Tormat. The black plastic contact rivet memory block at the end opposite the cable exit is screwed to the metal baseplate using two screws. After you remove these and the screws holding the cover, you can gently remove the memory block, followed by the cover itself. Be careful that you do not snag any wires when removing or replacing the cover. Obviously, the warranty is no longer in effect. Write-In Circuit Problems Here's how to determine if you have a problem in the Write-In circuit. If your machine uses a remote control stepper and it can be bypassed, do so by disconnecting the Tormat cables from the stepper and connecting them together.

Connect your analog voltmeter to the control center or selection receiver test terminal marked 'Write-In source' and ground, being sure to observe the proper polarity for your machine. Establish credit and make a selection. You should see the voltage at this point momentarily dip as the write-in capacitor is discharged through the Write-In triggering device and the selected Tormat Write-In loops, followed by the voltage slowly building up again as this capacitor charges. If the measured steady-state voltage is significantly lower than the expected voltage discussed above, the problem is in the control center or selection receiver power supply circuitry, a leaky Write-In capacitor, etc. If the low voltage still remains, the problem is in the power supply. Otherwise the problem is in the Pricing Unit or selection circuitry. If the Write-In triggering device is shorted or some other current path to ground exists, or there is a problem in the stepper if your machine uses one and you cannot bypass it the Write-In voltage will go to some lower value once the connections are re-established.

Won't make any selections If the Write-In voltage is correct but doesn't dip for any selection, the problem is in the triggering device, pulse-forming network, or the Tormat ground return. For the tube and non-digital solid-state machines, the triggering device is the segmented switch located in the Pricing Unit. This switch is closed as the subtract solenoid energizes. The red box machines use a Write-In relay, located in the Phono Power Center. If the voltage never dips, this means that the Write-In circuit has not been completed to ground. Check the triggering device first, followed by the pulse-forming network. All machines use a network to shape the Write-In pulse. This circuit consists of several inductors, capacitors, resistors, and a voltage clamping device. The voltage clamping device will be either a diode or a zener diode, which clamps the Write-In pulse so that its amplitude cannot exceed one-half the Write-In supply.

The tube-type machines use a diode connected to the junction of the OA2 regulators to clamp the voltage to VDC. The solid state machines use either a diode to the bottom capacitor of the voltage doubler, or a zener rated at one-half the Write-In voltage. The final suspect is the Tormat ground return, which is typically connected through a temperature compensating resistor, located in the Tormat. Note that only some of the Write-In loops common to this resistor. Using your ohmmeter, check for ohms earlier machines or 72 ohms later to ground through the pins of the Tormat connector which route the Write-In loops to the resistor. Here's where having the manual for the machine comes in handy.

There will usually be a simplified Write-In circuit diagram which will identify which loops common through the resistor. If you get this reading on none of the pins, the resistor or the connection is probably open. Not getting the reading on one pin implies that loop is open. Keep in mind that the ground return to the control center or selection receiver is sometimes made through this same cable, so make sure you check for continuity all the way back. Also remember that some machines have a shorting link in the control center or selection receiver which completes the ground return. Missing or additional selections Successfully making some selections but not others indicates a problem in the selection circuits themselves. All non-digital machines use a latched push-button selector in which the depressed push buttons each complete a current path through the Tormat.

Symptoms: Scans back and forth without picking up record. Location: Englewood, CO. Refer to the user manual for your particular Seeburg model to identify and locate the parts and components on your model. Cabinet Keys for Seeburg models A thru SMC. All of the Seeburg models listed below use an Illinois brand lock and should look like the lock below. Seeburg was the only jukebox manufacturer from that era to use an electronic means to save selections that a customer selected. All other manufacturers used mechanical pins or levers. There are about a dozen items in a chain that have to work properly for the jukebox to make a selection, find the record and play it. Tony Miller, a former Seeburg engineer who has written books about working on Seeburg jukeboxes, has written a general guide for determining which part of the chain the problem is located.

It simply uses a 1. In the LPC jukeboxes, there are two pulse amplifiers, one for each side of the record. I found two problems with this jukebox, one more critical than the other. This would normally be around volts. On TCC1 Tormat Control Center 1 this can be measured at TS2 pin 2 TS2 is a test connector facing the front of the jukebox on the TCC1. Since I was getting zero volts there, I went directly to the OA2 voltage regulator tube between the 27K and the K resistors and I was getting the full volts there. So the problem was either the K resistor or downstream from it. I unplugged the Album Pricing Unit to isolate the TCC1. The voltage was still zero. I checked the K resistor, and it was okay. The only thing left was the 0. It was probably leaking current to ground, causing a voltage drop across the K resistor.

I replaced it and the voltage came up to V which is good enough. The secondary problem were the write trigger contacts in the Pricing Unit. The contacts are shown in the left yellow shaded area of the schematic above and on the diagram below. One contact rests on an insulator and the other rests on a copper piece. When the cancel solenoid actuates, the disk rotates moving the copper under both contacts, making a connection. With age, dust and arcing this switch creates a volt pulse , these contacts often have carbon build-up on them. I cleaned the contacts with some grit polishing paper, followed by some alcohol remove any grimy residue. I rechecked and I got 0 ohms when I actuated the armature.

I put everything back together and made a selection and the mechanism stopped at the record and played it. All fixed! Great Seeburg resource guides! These were from a company called Hudsons Bay Wholesale which operated 's of Seeburg jukeboxes across Canada back in the the day the author was Karl Jones. Ron Rich says: 'The 'test lamp' consisted of a NE 51H, lamp, 'selected' to light at 6 volts dc, with a33 k resistor in series. I John use one of the two lead neon bulb test lamps you can still buy at hardware stores they work pretty well for doing the Seeburg tests. Ron Rich says edited by JR :To update either a 45 TASU-1, or -2 AUTO-SPEED to a code C unit add, if not there, a 1.

Also, add a short jumper wire between the speed control CASE, to the common grounds on the relay contacts black wires as there are schematics that show this ground on the wiper side --wrong-- that would short out the control! 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. The two pictures show the arm that must move freely when the tower is out of the machine, and the clip to remove to start the disassembly Servicing the SHP1Amplifier: This amplifier needs a couple of modifications done to ensure it will stay reliable, and - if a problem occurs - is less likely to have major transistor failures.

Read this PDF coming soon First you MUST replace all the Electrolytic Capacitors found in the amplifier - the ones on the circuit boards and the ones on the underside of the amplifier chassis. For the LPC, which uses two Tormat Amplifers, you can use a Dual Trace Oscilloscope - connect the inputs to the capacitor going to the tube s and remove the tubes. Now make any selection you have pulled the s I hope and IF the amplifiers are both working correctly you should see something like this Certain parts of this may, or may not, apply to your model phonograph--see the model specific guides. Seeburg Lpc Service Manual Posted on by admin. Location: Englewood, CO Seeburg Lpc Service Manual Download Seeburg Lpc Service Manual Pdf Seeburg Lpc Service Manuals Pdf Seeburg Lpc Service Manual Refer to the user manual for your particular Seeburg model to identify and locate the parts and components on your model.

Updated as of March 2, Great Seeburg resource guides! Typical lubrication points PDF for the Seeburg mechanism Seeburg Lpc Service Manual Download 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 : Seeburg Lpc Service Manual Pdf 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.

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. Seeburg Lpc Service Manuals Pdf Servicing the Seeburg tube style Tormat readout under construction Seeburg Tormat Readout Testing This is a Seeburg LPC series control center - the battery test using an AA 1. 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 Seeburg Lpc Service Manual 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. 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 first two symptoms pertain to any jukebox between the MA and the SMC3. 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. If this switch is shorted, or the cabling between it, the reject switch in the Volume Control Assembly, optional PRVC, or the Mute Trip Relay in the Amplifier is grounded this can occur. 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. Given the symptom, it is probably reasonable to assume that the other supplies are functioning properly, but it doesn't hurt to check them, too.

There should be test terminals for these supplies on the same terminal strip.

Seeburg Lpc 480 Service Manual,Jukebox trouble shooting

Seeburg LPC Manuals. Manuals and Guides for Seeburg LPC Free Download. Seeburg LPC Note: Many of the manuals for the Seeburg LPC are also applicable to Seeburg Models LPC, LPCR, LPCD and LPCDR Installation & Operation All Supplements Master Service Manual, Parts Catalog Troubleshooting Guide $ Buy Now Seeburg LPC Manuals. Manuals and Guides for Seeburg LPC Free Download. Seeburg LPC Note: Many of the manuals for the Seeburg LPC are also applicable to SEEBURG acoustic line Downloads: Product-Guide Anwenderpreise Flightcases etc The secondary problem were the write trigger contacts in the Pricing Unit. Seeburg Lpc Service Manual' title='Seeburg Lpc Service Manual' />Free Pdf Repair Manuals The secondary problem were the write trigger contacts in the Pricing Unit. Seeburg Lpc Service Manual' title='Seeburg Lpc Service Manual' />Free Pdf Repair Manuals ... read more

If the short goes away, the problem is in the amplifier, volume control, or PRVC a likely candidate. Updated as of March 2, Great Seeburg resource guides! Not getting the reading on one pin implies that loop is open. If you get this reading on none of the pins, the resistor or the connection is probably open. The voltage clamping device will be either a diode or a zener diode, which clamps the Write-In pulse so that its amplitude cannot exceed one-half the Write-In supply.

They are located in the gray or red boxes, depending on type of machine. They include: Magazine - Horizontal Position, Transfer Arm 1, seeburg lpc-480 service manual free pdf download, Tormat Memory Unit Position, Read-Out Contact Seeburg lpc-480 service manual free pdf download 1, 3, and Detent Switch. Jukebox trouble shooting Seeburg Lpc Service Manual Two problems common to virtually all Seeburg vertical play record mechanisms are independent of the selection system used in the jukebox. 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. This is the inductor that is mounted to the Detent Timing switch next to the motor. Also remember that some machines have a shorting link in the control center or selection receiver which completes the ground return.