Mitsubishi LT-20 - Service Manual

ate MITSUBISHI
AUDIO SYSTEMS
SERVICE MANUAL
LINEAR
TRACKING
TURNTABLE
MODEL
LT-20
CONTENTS
IDENTIFICATION AND OPERATION 1.0.2.0... 0000 cece eet ee ees 2
SCHEMATIC REPRESENTATION OF LT-20 AUTOMATIC FUNCTIONS ........0. 0.20000. cece eee 2
SPECIRIGATIONS: 2k ee tt MRR oe Ee eee EN eras Pass BRN We Pee GotlGehe ae Rinses honk od 3
DISASSEMBLY INSTRUCTIONS ........... BS eh city gd een Ruben Anions Sghear thd Miele ten caetyis etree ee 3
ADJUSTMENTS: «£8 awd Goce iiwk ewes MaalhG 8 Sabausd OD Sao eo REM aaa bE Ree AE eS SSS 4
INTERNAL DIAGRAMS AND PINOUT OF INTEGRATED CIRCUITS ................- Bok uaa ate 8
INFORMATION ON LOGIC IC (MSM-5831RS) 20... eee ee eee 10
WIRING: DIAGRAM sake <i i bao bes d ae eae Sees Wade oc Ame Ts pases Taaels et uewes Gee Es 11
PRINTED CIRCUIT BOARDS ........ 000. c cece eee eee eee ee eee 13
SCHEMATIC DIAGRAM: 3.5 cote aan aedacad ese pee tow domes bt panei rensaw he Pe ROR eT O Rees 15
EXPLODED: VIEW cusona oh uwer wed GAas £44 BENE ELEN habe be ys Oh Re awe ed halal. 17
PARTS MISH. -scce-c-amred i es. Pe ershed eles Sei biestd stein abel frida Dhuuph eos ba Gehuet oS oeliphankde to Marae he ohana 18
PACKING INST RUETIONS «4 5k watee eu ada a daa ake Saeed bs ade edd gabe ea eee RAS 20
MITSUBISHI ELECTRIC SALES AMERICA, INC.
3030 East Victoria Street Compton, California 90221

Summary

IDENTIFICATION AND OPERATION

SCHEMATIC REPRESENTATION OF LT-20 AUTOMATIC FUNCTIONS

Illustrates automatic operational sequences of the turntable.

DISASSEMBLY INSTRUCTIONS

REMOVAL OF FRONT PANEL

REMOVAL OF TONEARM ASSY

Steps for detaching and removing the tonearm assembly.

ADJUSTMENTS

TRACKING FORCE ADJUSTMENT

Guide on setting the correct tracking force for the stylus.

TONEARM HEIGHT ADJUSTMENT

Procedure for adjusting the vertical height of the tonearm.

STYLUS HEIGHT ADJUSTMENT

Steps to set the optimal stylus height relative to the record.

ADJUSTMENT OF LEAD-IN POSITION

Procedure for setting the correct starting point for the tonearm.

HORIZONTAL TRACKING ANGLE ADJUSTMENT

TRACKING SERVO AMPLIFIER ADJUSTMENT

Procedure for calibrating the tracking servo amplifier.

BA6109 VERTICAL DRIVE I.C.

INFORMATION ON LOGIC IC (MSM-5831 RS)

CIRCUIT CONSTRUCTION

PIN AND FUNCTION

Detailed explanation of each pin and its function on the IC.

WIRING DIAGRAM

SCHEMATIC DIAGRAM

EXPLODED VIEW

Mitsubishi LT-20 Specifications

General

Brand	Mitsubishi
Model	LT-20
Category	Turntable
Language	English