Mitsubishi lt 22 service en

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A MITSUBISHI

AUDIO SYSTEMS

SERVICE MANUAL

LINEAR TRACKING TURNTABLE
MODEL LT-22

CONTENTS
IDENTIFICATION AND OPERATION ..................................................... 2
SCHEMATIC REPRESENTATION 0F LT-22 AUTOMATIC FUNCTIONS. . . . . . . . . . . . . . . . . ; ........... 2
SPECIFICATIONS ............................................................ _ ........ 3
DISASSEMBLY INSTRUCTIONS ......................................................... 3
ADJUSTMENTS ..................................................................... 4
INTERNAL DIAGRAMS AND PINOUT OF INTEGRATED CIRCUITS .............................. 8
INFORMATION ON LOGIC IC (MSM-5831RS) .............................................. 10
WIRING DIAGRAM ................................................................. 11
PRINTED CIRCUIT BOARDS .......................................................... 13
SCHEMATIC DIAGRAM .............................................................. 15
EXPLODED VIEW .............................. V .................................... 17
PARTS LIST ...................................................................... 18
PACKING INSTRUCTIONS ............................................................. 20
NOMENCLATURE OF SCREWS, WASHERS AND NUTS ......................................... 21

MITSUBISHI ELECTRIC SALES AMERICA, INC.

3030 East Victoria Street Rancho Dominguez, California 90221

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IDENTIFICATION AND OPERATION:

Prism

Light emitter (M07137605) Main weight (M07527635)

Q

Ornament (M07670225)

Tracking force adjustment weight
Tone arm (M07543600)

Arm rest/POWER switch
Head shell (M07543616)

Platter mat (M07543622)

KNOB (MD7670201)
PANEL-ASSY (M07670100)

QUARTZ (Quartz lock indicator)

SPEED (Speed reset button)
REPEAT (Repeat button)

START 4 (Start button)

SCHEMATIC REPRESENTATION OF LT-20 AUTOMATIC FUNCTIONS

STOP D (Stop button)
LIFT/CUE AV (Arm lift/cue button)

Power nn: turn the locking arm of the
arm rest in a counterclockwise direction.
Tonearm becomes free.

=9»?

Stylus-lift priority: press (AVI to
reverse stylus descentt Stylus ascent
cannot be reversed beiure completions

Auto had-in: press the start (4 ) button
once to commence audition

Fr-a travel: press (d) and (D) buttons
to move the tone arm in either direction,
then in l to lower it.

iol
E

Auto return: the tone arm returns
automatically at the end of the disc.

Return: it, while pressing ( ) the tone
arm moves over the edge of the disc, it
will return rapidly to rest,

Auto cut: press the step (b) button
once to interrupt and end disc auditian

Quick response: any movement except
Iiit/cue of the stylus can be interrupted
by a new comment

Free access lead-In: continue to press the
start (4) button and the tone arm will
travel on over the disc until pressure is
released. Press the lift/cue button (4,»)
to lower it

Stylus protection: when there is no disc
on the platter, the stylus will not
descend, and the tone arm will return to
TESL

Repeat: pressing the repeat button turns
the repeat function alternately on and
aft When on, the indicator lights.

Manual lead-in: first switch on the
platter motor, then lift the slvius over to
the lead-in groovet

Lift-up and cueing: pressing the lift/cue
(AV) button alternately lowers and
raises the tone arm,

Manual loadAout: lift the stylus and
return the tune arm to the rest position.
The platter will stop automatically.