Seeburg LS1 Select-O-Matic Phonograph Service Manual PDF

Description

Seeburg LS1 Select-O-Matic Phonograph Service Manual PDF DOWNLOAD

Description

This is the original Seeburg LS1 Select-O-Matic Phonograph Service Manual, issued by Seeburg Corporation, Chicago, Illinois, USA. It is the factory reference used by Seeburg technicians for installation, service, adjustment, and troubleshooting of the LS1 model jukebox and its associated solid-state electronics and coin/credit systems.

The manual covers everything from basic specifications and wiring harnesses to Tormat selection memory operation, credit/pricing logic, and mechanism adjustments for the Type 1605T17 Select-O-Matic mechanism. It is essential for restoring or maintaining a Seeburg LS1 jukebox to proper operating condition.

🔧 Main Sections & Coverage

1. General Description & Table of Contents

• Overview of the Select-O-Matic Phonograph, Model LS1

• Section index for:

  • General description & cabinet cabling (10-22)

  • Select-O-Matic mechanism, Type 1605T17 (20-22)

  • Tormat Electrical Selector, Type TES1613-56

  • Solid State Stereo Amplifier, Type T5A6

  • Solid State Control Center, Type SCC7

  • Solid State Auto-Speed, Type SAS1

  • Universal Dual Pricing Unit, Type UDPU6

  • Coin equipment & Recording Income Totalizer

  • Solid State Stepper Unit, Type SSU4

  • Auxiliary Power Supply, Type RP58K-56

  • Powered Remote Volume Control, Type PRVC3

  • Remote stereo speakers

2. Specifications – Model LS1

• Power Requirements: 120 V, 60 Hz

  • Standby: approx. 110 W / 1.4 A

  • Operating: approx. 190 W / 2.0 A

• Record Type: 7″ records, 33-1/3 & 45 rpm

• Record Capacity: 80 records / 160 selections

• Pickup: High-compliance, mu-metal shielded stereophonic magnetic pickup with dual diamond styli

• Speakers (internal):

  • Two 12″ low frequency speakers

  • Two 6″ x 9″ high frequency speakers

• Cabinet Lighting:

  • One 30 W, 36″ cool white fluorescent (FS4 starter)

  • One 19 W, 30″ cool white fluorescent (FS25 starter)

• Cabinet Finish: High pressure laminate, wood stain, aluminum and chrome trim, blue anodized aluminum grille

• Key Number: F-205

• Album Display: Type AD2

• Main Mechanism: Select-O-Matic mechanism Type 1605T17 with Tormat Memory Unit Type 160TMS

3. Major Electronic Units

• Solid State Stereo Amplifier: Type T5A6

• Solid State Control Center (SCC7):

  • Power distribution

  • Timing and trip circuits

  • +40 VDC supplies, fusing, control logic

• Solid State Auto-Speed Unit: Type SAS1

  • 33-1/3 vs 45 rpm speed switching

  • 44 Hz converter for 33-1/3 rpm power

• Tormat Electrical Selector: Type TES1613-56

  • Tormat write-in matrix and selection input

• Universal Dual Pricing Unit: Type UDPU6

  • Credit accumulation

  • Single vs album credit lamps

  • Subtract logic, latch and shift solenoids

• Solid State Stepper Unit: Type SSU4

• Auxiliary Power Supply: Type RP58K-56

• Powered Remote Volume Control: Type PRVC3

• Remote Stereo Speakers & Accessories: TS1-8, TRI-8, RTRI-8, EBWC2-12, consolettes, recording income totalizer kits, dollar bill validator and pre-select kits, etc.

4. Cabinet Cabling, Fuses & Parts Lists

• Full cabinet cabling diagram for LS1

• Detailed parts list for:

  • Line cord & switch assemblies

  • Fluorescent cable assemblies

  • Counters (50 / 60 Hz)

  • Speaker cables

  • Transformers, fuse holders, fuse ratings

  • Connectors, pin housings, sockets, jumpers

• Fuse ratings for:

  • Solid State Control Center

  • Select-O-Matic mechanism

  • Stereo amplifier

  • Auto-speed unit

  • Pricing unit

  • Stepper unit

  • Power junction unit

5. Operation & Credit System

The manual includes simplified schematics and narrative descriptions of the LS1’s full credit and play control system:

• Credit System Add Circuit

  • Coin switch wiring and solenoids (dime, quarter, half-dollar)

  • Add-hold magnet and timing (approx. 80 ms hold)

  • Service switch credit add function

• Latch Solenoid & Credit Lamps

  • Single (10¢) and album (25¢) credit lamp logic

  • Latch bar solenoid enabling selection buttons

• Subtract Circuit (Single & Album)

  • Subtract and shift solenoids

  • Pricing treadle bar and credit ratchet wheel

• Timing Relay Circuit

  • Controls sequence: subtract → scan start → write-in pulse → counter impulse

  • Protects against key held down / insufficient credit / coin timing issues

• Play Control and Counter Assembly

  • Add solenoid for scan control

  • Play control subtract switch on mechanism (ramp actuated)

  • Manual credit / subtract functions via service switch assembly

6. Tormat Selection System (Core Memory)

A full explanation of the Tormat memory core system:

• Toroidal Magnetic Cores (Toroids):

  • 160 toroids (one per side of 80 records) arranged in two rows of 80

  • Write-in, readout, and sense windings for each core

• Write-In Circuit:

  • Matrix of letter and number rows (e.g. toroid B-2, etc.)

  • Pulses routed through letter + number line so only one toroid sees “double strength” field and toggles to “selected” state

• Readout Circuit:

  • Opposite-phase pulse returns toroid to zero state and generates a small sense pulse if selection was stored

• Sensing & Trip Relay Circuit:

  • Sense loop pulse triggers silicon controlled switch (SCS), energizing the trip relay

  • Trip relay drives the trip solenoid on the 1605T17 mechanism at the precise record position

• Mechanism Motor Power Circuit:

  • 120 V AC direct drive for scan and 45 rpm

  • 44 Hz converter via SAS1 for 33-1/3 rpm operation

7. Select-O-Matic Mechanism Type 1605T17 (Section 20-22)

A large portion of the manual is devoted to mechanism adjustments:

• Preface & Basic Concepts

  • Definitions of SCAN, TRANSFER, PLAY cycles

  • Right / left record side, clockwise / counterclockwise flywheel rotation conventions

• Turntable, Shaft & Gear Installation

  • Thrust washers, end play (.003″–.015″)

  • Worm gear and helical gear alignment

  • Lubrication with Seeburg Special Purpose Oil

    235602372-Seeburg-LS1-ServiceMa…

• Clutch & Housing Assembly

  • “Clutch 1–4” adjustments:

    • Clutch lifting travel

    • Sprocket clearance & detenting

    • Detent locking

    • Clutch play position (1/64″ clearance to worm pin)

• Trip Solenoid & Safety Lever

  • Trip solenoid position and plunger clearance

  • Safety lever setting and safety plunger movement to protect records during mis-transfer

• Guide Rollers

  • Carriage guide roller limit screws for front–back play (.003″–.020″)

• Clamp & Transfer Arms

  • Installation and washer selection to set end play (.003″–.007″)

  • Arm alignment with transfer slots and contact arm

• Cam Assembly & Detent Arm

  • Installation, washers selection, and end play

• Additional Items

  • Cam switch, clutch switch, clamp arm switch

  • Popularity meter reset lever switch

  • Reversing switches, rubber bumpers

  • Tormat memory unit position and wiring diagram

📁 File Details