Seeburg Photos and Repair Journals
Retro Electronics and Audio Lab, Midland, TX.
We will work to get individual pages for these machines soon!
Quick Navigate: APFEAI Discotheque LPC-1B M100-B LS-2Equipment Photos Retro Electronics Home Page
1965 Seeburg APFEAI
2005) Mechanism was stalled out when first plugged in. We replaced all
capacitors in the autospeed generator and were able to get the mech to
start up. At first it was ejecting the record immediately after loading
it, but cleaning the mechanism and lubricating with LPS-2 and S'OK!
penetrating oil helped restore proper mech function. There was a lot of
rumble and a wavering sound as the record played, so we ordered new
rubber motor mounts and a motor coupling and installed them. It was
necessary to cut the old motor mount metal mounting rings off the motor
with a cutting wheel on the Dremel tool as they were on very tight.
However, the new mount discs were loose on the motor. A strip of metal
tape around the motor end bells tightened it up.
It was also difficult to get the motor
coupler on. We had to deburr the worm gear drive shaft with some fine
sandpaper to get it to go on. We then found that there was still some
rumble in the sound so we removed the turntable to replace the grommets
that isolate the turntable from the drive pins. The special grommets
had deteriorated so we replaced them with similar sized regular rubber
grommets. 2 grommets were inserted down each hole in the turntable
casting and adding another half of a grommet to both ends shimmed out
the turntable to the proper dimensions. We used a magnetic screwdriver
to hold the backing nuts connecting the turntable to the bearing while
the screws were installed.
The new motor mounts, coupling, and grommets got rid of the flutter and rumble.
We installed a new power cord and found that the fluorescent ballasts looked overheated. We tried replacing one of the ballasts with a single-coil type ballast but this appeared to be incompatible with the larger 30-watt bulbs as they would only flicker. Then we tried re-wiring the system for rapid-start 30 watt ballasts. We removed the starters and connected new leads to each of the lamp sockets., and installed 3 new rapid start 30 watt ballasts. Ground leads were attached to each of the ballasts and washers were placed under the ballasts on the mounting screws to provide air space behind the ballasts for better cooling. We installed a new power cord and 1 1/2 amp fuse for the ballasts.
We replaced all electrolytic and paper
capacitors in the control center and installed a new fuse holder and 5
amp fuse. There was a 15-amp fuse installed which would give very
little protection in case of an overloaded transformer.
. The "A" prefix before the model number denotes an "Album" player system which reads the toroids for both the A and B sides simultaneously. If both the A and B sides of a record are selected, the A side will play first, then the B immediately after. This machine only reads out and plays records on the left-to-right scan of the machine, requiring the use of a reversing relay to play the B sides of records.. It is almost identical in function to the LPC-1 only the APFEA1 uses a solid state control center rather than the tube type of the LPC -1.
Another problem was noted: If both the A and B sides of the same record were selected, the A side would reject after being loaded, but then the B side would play OK. We adjusted the contacts at the bottom of the switch stack under the actuating lever to allow the A side to stay playing but found that the mech trip solenoid was staying on. We then needed to adjust the horizontal switch contacts activated by the clutch lever and the system then worked fine.
We re-wired the keyboard button release
switch so it is now normally open. Someone had modified the credit unit
in the past to never run out of credits, however this led to the
keyboard solenoid being on continuously. To prevent the solenoid from
overheating, the release switch is now pressed to activate the solenoid
while making selections and then released when done.
Photos: Chad with the autospeed generator, starting repairs Replacing capacitors in the autospeed generator.Mechanism Cabinet open view. Completed autospeed unit Amp, Autospeed Generator, and Control Center
Maker's Plate Front view, cabinet closed Motor and motor coupling disassembled. Rewiring the power cord.Testing the new ballast. New ballasts installed. New capacitors in control center. Control center chassis.
Then, we needed to replace the 6X4 tube in the control center to get it to where it would play selections entered from the keyboard. All capacitors were replaced in the control center and pulse amps and a new power cord added. The machine would not play the "B" side of the record, though. This machine operates differently from most Seeburg machines in that records are only loaded as the player scans from left to right. In most other Seeburg mechanisms, when a "B" side of a record is chosen, it is loaded when the player is scanning in the reverse direction (from right to left). Since the mechanism is running in reverse, the tonearm shifts to the right and the record is turning in the proper direction to play the "B" side.
On the LPC-1, though, since records are only loaded in the "forward" direction, a reversing relay is used to reverse the motor when the control center detects that a "B" side has been selected. We found that there were 2 contacts on the bottom of the switch stack activated by the clutch lever that were not making contact, leading to the reversing relay not activating.
We replaced electrolytic capacitors in the amp and a Mylar cap that was thermally intermittant, also replaced some transistors in the phono preamp that were exhibiting some thermal problems. A new power cord, fuseholder, and power switch were installed.
Originally we had set up a
microswitch to be activated by the coin reject button to give credits
without coins (the coin mechanism works fine on this unit). However
when we got the jukebox on the location the fuse was blowing in the
credit unit due to the microswitch staying on inadvertantly because the
mounting bracket we had set up just wasn't working right.. We replaced
the microswitch with a momentary contact switch in parallel with a coin
switch contact mounted in a small junction box on the back of the
jukebox. This is pressed to add credits without needing coins.
Seeburg LPC-1 photos: Front of LPC
with lid open. LPC mechanism. Amp, Autospeed Unit, and Control Center
the LPC-1 amp, LPC-1 with
Chad and owner Sylver Galvan
Seeburg M100-B photos: Seeburg M-100 B, operating, Seeburg M-100 B on Tommy Lift with John, Mechanism
M100B (another view), Chad
with Seeburg M100B, Seeburg
M100B amp/selection and credit unit
Seeburg LS-2 #1 photo.
1968 Seeburg LS-2. This is the second of our 2 LS-2's. It was connected to speakers in the garage and an outdoor horn speaker to provide music throughout the shop. New phono needles really improved its performance.
It now resides at the West Building. We had to completely disassemble it to carry it upstairs then re-assemble it. New capacitors were installed in the amp and control center, plus a new ballast.
Seeburg LS-2 (#2) photos: Seeburg LS-2 #2 lighted view, Seeburg LS-2 #2, dark view
Seeburg LS-2 Parts in the truck, going to the West Building (August, 2007)