Leslie 925 service manual

Page 2

CONTENTS

INTRODUCTION
The LESLIE Speaker Model 925 ............ 1
Specifications ............................. 2
Guarantee ............................... 2
OPERATION
Preparing Speaker for Use ................. 2
Volume Control Adjustment ................ 2
Controls ................................. 3
Auxiliary Control Circuit ................... 3
Speaker Cable 021600 ...................... 3
Multiple Speaker Installation ............... 3
SERVICE
Line Voltage ............................. 3
Ordering Parts ........................... 3

ELECTRONIC SERVICING

Amplifier ................................ 4
Circuit Board Trouble Shooting ............. 4
Voltage Checks ........................... 4
Preamp-Crossover Network Voltages -

Parts List - Parts Side ............... 5
Treble/ Auxiliary Amplifier Voltages -

Parts List - Parts Side ............... 6
Bass Amplifier Voltages - Parts List -

Parts Side ............................ 7
Power Supply ............................. 8

Circuit Board Maintenance ................. 8
Motor and Brake Control Circuits ........... 8
Power Supply Parts List and Parts Side ...... 9
234/250 Volt Conversions .................. 10

MECHANICAL SERVICING

Two Speed Motor Assembly ................ 10
Motor Lubrication & Cleaning .............. 10
Small Motor Shaft Operation & Adjustment .(11
Motor Noises ............................. 11
Drive Belts .............................. 11
Treble Drive Belt ......................... 11
Bass Drive Belt ........................... 11
Speaker Replacement ...................... 12
Treble Speaker ........................... 12
Bass Speaker ............................. 12
Auxiliary Speakers (6 x 9s) .............. 12
Bass Rotor ............................... 12
Bass Rotor Replacement .................. 12

Bass Rotor, Upper Bearing Replacement .12
Bass Rotor, Lower Bearing Replacement . . . .12
Treble Horn Lubrication/ Spindle Removal . . . .13

Horn Reflector Replacement ................ 13
Mechanical Assy. Parts List ............... 14
Mechanical Assy. Exploded View ........... 15
Model 925 Schematic ...................... 16
Schematic: 234/250 Volt Power Supply ...... 17

Model 925 Plugs & Sockets ................ 17